Specification of Level 2 Products
This section describes the product name convention and the product classification.
Product Name Convention
According to [AD-13], Swarm product names consist of 10 digits, which are subdivided into two sub-fields as follows: TTTTTTTTTT = FFFFDDDDDD, where FFFF = File Category and DDDDDD = Semantic Descriptor.
For L2 products FFFF = FFFx, where FFF describes the product type (e.g. MCO - Magnetic Core Field) and for the single satelitte x = A, B or C for Swarm A, Swarm B, or Swarm C, respectively. If the product is derived from (available for) the satellite constellation (e.g. A and C) x = _.
The Semantic Descriptor DDDDDD = DDDy2z. DDD provides a description which is specific for each product, for example TMS for time series or SHA for spherical harmonics and y = _.
The last two digits describe the product level [AD-13]. Therefore digit 9 is always 2, identifying the product as a L2 product. The last digit z indicates the origin or the purpose of the product. This applies especially when different chains lead to the same science product. This last digit z can be:
C | derived from Comprehensive Inversion |
D | derived from dedicated chain |
F | Fast Track product |
E | Extended, only applied for extended lithospheric field maps (MLI_SHA_2E) |
_ | Only one chain has been identified to lead to this product type |
a | Product derived from candidate chain a (only applied for mantle conductivity products - derived in the frequency domain) |
b | Product derived from candidate chain b (only applied for mantle conductivity products - derived in the time domain) |
Product Classification
L2 product Categories (Cat) have been defined in [AD-12]. Each L2 product is attributed to one of these categories.
Cat-1: Complex algorithms contributing to the generation of a L2 product of the various sources of the Earth's magnetic field, of thermospheric products, and for Precise Orbit determination. The generation of Cat-1 products require interaction with experienced scientists. The products will be processed by SCARF, and will be distributed by ESA.
Cat-2: Algorithms leading to a L2 product with minimum delay with respect to the generation of the corresponding Level 1b data. The generation of Cat-2 products is designed to run automatically. The Cat-2 products will be generated and distributed by ESA.
Fast Track products: The validation is performed by means of an internal quality check in the algorithms of each of these products, and the quality of the product is provided, e.g., by a quality flag. Fast Track products are released without a validation report. The Cat-1 magnetic products, e.g. core field model and magnetospheric model, will be derived on Fast Track. All Cat-2 products are Fast Track products. For all Fast Track products, the last letter of the product name is F (see Product Name Convention).
Validation Reports: For non-Fast Track products a validation report is required. Validation reports are provided for each product chain (see L2 Product Overview Table). The inter-comparison between products of two chains in one product family (e.g. MCO_SHA_2D and MCO_SHA_2C) will be released in one validation report (e.g MCO_VAL_2_). Validation report products exist for following product families (e.g.): core field models, lithospheric field models, ionospheric models, magnetosphere models, 1D-mantle conductivity (mantle conductivity model and C-response), 3D-mantle conductivity (mantle conductivity model and C-response maps), precise orbit determination, and thermospheric winds and density.
Level 2 Product Overview
Complete information about the Swarm Level 2 products can be found in the following document: "Product specification for L2 Products and Auxiliary Products".
More information about Science Objectives can be found on the Mission Overview web page.
Science Objective | Product Name | Description | Format | Extension |
Core Field | MCO_SHA_2C | Cat-1: Spherical harmonic model of the main (core) field and its temporal variation | ASCII listing (SHC) | .shc |
MCO_SHA_2D | Cat-1: Spherical harmonic model of the main (core) field and its temporal variation | ASCII listing (SHC) | .shc | |
MCO_VAL_2C | Cat-1: Validation report on core magnetic field | |||
MCO_VAL_2D | Cat-1: Validation report on core magnetic field | |||
MCO_VAL_2_ | Cat-1: Validation report on core magnetic field | |||
MCO_SHA_2F | Cat-1: Spherical harmonic model of the main (core) field and its temporal variation | ASCII listing (SHC) | .shc | |
MCO_SHA_2X | Cat-1: Spherical harmonic model of the main (core) field and its temporal variation | ASCII listing (SHC) | .shc | |
Lithospheric Field | MLI_SHA_2C | Cat-1: Spherical harmonic model of the lithospheric field | ASCII listing (SHC) | .shc |
MLI_SHA_2D | Cat-1: Spherical harmonic model of the lithospheric field | ASCII listing (SHC) | .shc | |
MLI_VAL_2C | Cat-1: Validation report on lithospheric field | |||
MLI_VAL_2D | Cat-1: Validation report on lithospheric field | |||
MLI_VAL_2_ | Cat-1: Validation report on lithospheric field | |||
Mantle Conductivity | MIN_1DM_2_ | Cat-1: 1D model of mantle conductivity | ASCII listing | .txt |
MCR_1DM_2_ | Cat-1: 1D C-response maps | ASCII listing | .txt | |
MI1_VAL_2_ | Cat-1: Validation report on 1D mantle conductivity | |||
MC1_VAL_2_ | Cat-1: Validation report on 1D C-response | |||
External Current Systems | MMA_SHA_2C | Cat-1: Spherical harmonic model of the large-scale magnetospheric field and its Earth-induced counterpart | CDF | .cdf |
MMA_VAL_2C | Cat-1: Validation report magnetospheric magnetic model | |||
MMA_SHA_2F | Cat-1: Spherical harmonic model of the large-scale magnetospheric field and its Earth-induced counterpart | CDF | .cdf | |
MIO_SHA_2C | Cat-1: Spherical harmonic model of the daily geomagnetic variation at middle latitudes (Sq) and low latitudes (EEJ) | ASCII listing | .txt | |
MIO_SHA_2D | Cat-1: Spherical harmonic model of the daily geomagnetic variation at middle latitudes (Sq) and low latitudes (EEJ) | ASCII listing | .txt | |
MIO_VAL_2C | Cat-1: Validation report on ionospheric magnetic model | |||
MIO_VAL_2D | Cat-1: Validation report on ionospheric magnetic model | |||
MIO_VAL_2_ | Cat-1: Validation report on ionospheric magnetic model | |||
IBIxTMS_2F | Cat-2: Ionospheric bubble index | CDF | .cdf | |
TECxTMS_2F | Cat-2: Time series of the ionospheric total electron content | CDF | .cdf | |
FAC_TMS_2F |
Cat-2: Time series of field-aligned currents (FAC-dual) |
CDF | .cdf | |
FACxTMS_2F |
Cat-2: Time series of field-aligned currents (FAC-single) |
CDF | .cdf | |
EEFxTMS_2F | Cat-2: Equatorial Electric Field | CDF | .cdf | |
Precise Orbit Determination | SP3xCOM_2_ | Cat-1: time series of position and velocity of the center of mass of each satellite (reduced-dynamic POD) | ASCII listing (SP3) | .sp3 |
SP3xKIN_2_ | Cat-1: time series of position of the center of mass of each satellite (kinematic POD) | ASCII listing (SP3) | .sp3 | |
SP3xVAL_2_ | Cat-1: Validation report for SP3xCOM_2_ | |||
ACCxPOD_2_ | Cat-1: Time series of non-gravitational accelerations estimated by POD | CDF | .cdf | |
Accelerometry | ACCxCAL_2_ | Cat-1: Corrected and calibrated accelerometer observations | CDF | .cdf |
ACCxVAL_2_ | Cat-1: Validation report for ACCxCAL_2_ | |||
Magnetic Forcing of the Upper Atmosphere | ACCx_AE_2_ | Cat-1: Time series of calibrated and pre-processed accelerometer observations and of aerodynamic accelerations | CDF | .cdf |
DNSxPOD_2_ | Cat-1: time series of neutral thermospheric density from precise orbit determination data only | CDF | .cdf | |
DNSxACC_2_ | Cat-1: time series of neutral thermospheric density | CDF | .cdf | |
Swarm DISC Products | IPDxIRR_2F | Time series of characteristics of the plasma density and plasma irregularities along the orbit from single satellite measurements | CDF | .cdf |
Level 2 Products
Core Field
⇒ L2 Cat-1: MCO_SHA_2C
Product identifier | MCO_SHA_2C |
Definition | Spherical harmonic model of the main (core) field and its temporal variation |
Input Data | MCO_SHAi2C, MCO_VAL_2_ |
Input Time Span | All available quiet time observations from the mission |
Spatial representation | Spherical Harmonics up to degree 18 |
Time representation | Snapshot models, based on order 5 splines with 6 months knots spacing |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refer to quality report |
Quality indicator | Statistics of data misfit provided in validation report |
Data volume | ~10 kB |
Data format | ASCII table (SHC) [AD-15] |
Output Data | Gauss coefficients |
Output time span | As input time span but with some extrapolations |
Update rate | First after 1 year, updated every year |
Latency | 1.5 months |
Notes |
⇒ L2 Cat-1: MCO_SHA_2D
Product identifier | MCO_SHA_2D |
Definition | Spherical harmonic model of the main (core) field and its temporal variation |
Input Data | MCO_SHAi2D, MCO_VAL_2_ |
Input Time Span | Nominal minimum of 1 year up to the full Swarm data span |
Spatial representation | Spherical Harmonics up to degree 18 |
Time representation | Snapshot models (corresponding to 1/2 year knot separation and order 6 splines) |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refer to quality report |
Quality indicator | Statistics of data misfit, power spectra etc. provided in validation report |
Data volume | ~10 kB |
Data format | ASCII table (SHC) [AD-15] |
Output Data | Gauss coefficients |
Output time span | Time span same as for input |
Update rate | 1 per year |
Latency | 6 weeks |
Notes | The model accuracy strongly depends on the LT offset between the A and C satellite pair and the satellite B |
⇒ L2 Cat-1: MCO_VAL_2C
Product identifier | MCO_VAL_2C |
Definition | Validation report for core field model from CI chain |
Input Data | MCO_SHAiC, MCO_VALi2C, AUX_OBS_2_, AUX_IGR_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | First after 1 year, updated every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MCO_VAL_2D
Product identifier | MCO_VAL_2D |
Definition | Validation report for core field model from dedicated chain |
Input Data | MCO_SHAi2D, MCO_VALi2D, AUX_OBS_2_, AUX_IGR_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | 1 per year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MCO_VAL_2_
Product identifier | MCO_VAL_2_ |
Definition | Comparative validation report for core field models |
Input Data | MCO_SHA_2C, MCO_SHA_2D, MCO_VAL_2C, MCO_VAL_2D, AUX_OBS_2_, AUX_IGR_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | Each time both, MCO_SHA_2C and MCO_SHA_2D have been released |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MCO_SHA_2F
Product identifier | MCO_SHA_2F |
Definition | Spherical harmonic model of the main (core) field and its temporal variation |
Input Data | MAGx_LR_1B, AUX_IGR_2_, AUX_COR_2_, AUX_LIT_2_, AUX_DST_2_, AUX_KP__2_, AUX_IMF_2_. Optional: MMA_SHAi2C, MMA_SHA_2F, MIN_1DMi2_ |
Input Time Span | Minimum of 4 months |
Spatial representation | Spherical Harmonics up to degree 18 |
Time representation | Snapshot models |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refere to quality report |
Quality indicator | Statistics of data misfit, power spectra etc. provided in validation report |
Data volume | ~10 kB |
Data format | ASCII table [AD-15] |
Output Data | Gauss coefficients |
Output time span and resolution |
Time span: Minimum 4 months Time resolution: corresponding to 3 month knots separation and order 2 splines |
Update rate | First after 4 month, afterwards update is three months (if granted by data quality). |
Latency | 1 week |
Notes | Assumed updated rate is three month |
⇒ L2 Cat-1: MCO_SHA_2X
Product identifier | MCO_SHA_2X |
Definition | Spherical harmonic model of the main (core) field and its temporal variation |
Input Data | MAGx_LR_1B, AUX_DST_2_, AUX_KP__2_, AUX_IMF_2_, AUX_OBS_2_ |
Input Time Span | Minimum of 4 months |
Spatial representation | Spherical Harmonics up to degree 18 |
Time representation | Snapshot models |
Units | nT |
Resolution | 1 pT |
Uncertainty | |
Quality indicator | |
Data volume | ~10 kB |
Data format | ASCII table [AD-15] |
Output Data | Gauss coefficients |
Output time span and resolution |
Time span: Minimum 4 months Time resolution: corresponding to 3 month knots separation and order 2 splines |
Update rate | First after 4 month, afterwards update is three months (if granted by data quality). |
Latency | 1 week |
Notes |
Assumed updated rate is three month
More information can be found at |
Lithospheric Field
⇒ L2 Cat-1: MLI_SHA_2C
Product identifier | MLI_SHA_2C |
Definition | Spherical harmonic model of the lithospheric field |
Input Data | MLI_SHAi2C, MLI_VAL_2_ |
Input Time Span | All available quiet time observations from the mission |
Spatial representation | Spherical Harmonics from degree 16 to 150 |
Time representation | Snapshot |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refer to product quality report |
Quality indicator | Statistics of data misfits provided in validation report |
Data volume | ~0.5 MB |
Data format | ASCII table (SHC) [AD-15] |
Output Data | Gauss coefficients |
Output time span | N/A (lithospheric field is considered constant over the analysed time range) |
Update rate | First after 1 year, updated every year |
Latency | 1.5 months |
Notes |
⇒ L2 Cat-1: MLI_SHA_2D
Product identifier | MLI_SHA_2D |
Definition | Spherical harmonic model of the lithospheric field |
Input Data | MLI_SHAi2D, MLI_VAL_2_ |
Input Time Span | One to four years of full Swarm data set |
Spatial representation | Spherical Harmonics from degree 16 to 150 |
Time representation | Snapshot |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refer to product quality report |
Quality indicator | Statistics of data misfits provided in validation report |
Data volume | ~0.5 MB |
Data format | ASCII table (SHC) [AD-15] |
Output Data | Gauss coefficients |
Output time span | N/A (lithospheric field is considered constant over the analysed time range) |
Update rate | One model every year |
Latency | One month |
Notes |
⇒ L2 Cat-1: MLI_VAL_2C
Product identifier | MLI_VAL_2C |
Definition | Validation report for lithospheric field model from CI chain |
Input Data | MLI_SHAi2C, MLI_VALi2C, AUX_LIT_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | First after 1 year, updated every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MLI_VAL_2D
Product identifier | MLI_VAL_2 |
Definition | Validation report for lithospheric field model from dedicated |
Input Data | MLI_SHAi2D, MLI_VALi2D, AUX_LIT_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | One model every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MLI_VAL_2_
Product identifier | MLI_VAL_2_ |
Definition | Comparison validation report for lithospheric field model |
Input Data | MLI_SHA_2C, MLI_SHA_2D, MLI_SHA_2E, MLI_VAL_2C, MLI_VAL_2D, MLI_VAL_2E, AUX_LIT_2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | Each time both, MLI_SHA_2C , MLI_SHA_2D and MLI_SHA_2D have been released |
Latency | 1 month |
Notes |
Mantle Conductivity
⇒ L2 Cat-1: MIN_1DM_2_
Product identifier | MIN_1DM_2_ |
Definition | 1-D model of mantle conductivity |
Input Data | MIN_1DMi2_, MC1_VAL_2_ |
Input Time Span | 2 years |
Spatial representation | Conductivity distribution with respect to depth (1-D layered model of the Earth) |
Time representation | N/A |
Units | Kilometers (for layer radii), Siemens per meter (for conductivities) |
Resolution | N/A |
Uncertainty | Refer to product quality report |
Quality indicator | N/A |
Data volume | A few Kb |
Data format | ASCII listing [AD-15] |
Output Data | Conductivities within the layer, and radii of the top of the layer |
Output time span | N/A |
Update rate | First version after 2 years, update every year |
Latency | 1 month |
Notes | This 1-D model is foreseen as the output of the 1-D frequency domain inversion |
⇒ L2 Cat-1: MCR_1DM_2_
Product identifier | MCR_1DM_2_ |
Definition | Global 1D C-responses |
Input Data | MCR_1DMi2_, MC1_VAL_2_ |
Input Time Span | 2 years |
Spatial representation | N/A |
Time representation | N/A |
Units | km |
Resolution | N/A |
Uncertainty | Refer to product quality report |
Quality indicator | Uncertainties and squared coherencies coming from signal processing |
Data volume | A few Kb |
Data format | ASCII listing [AD-15] |
Output Data | C-responses (real and imaginary parts), their uncertainties and squared coherences on a set of periods |
Output time span and resolution | N/A |
Update rate | First version after 2 years, update every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MI1_VAL_2_
Product identifier | MI1_VAL_2_ |
Definition | Validation report for 1D mantle conductivity |
Input Data | MIN_1DMi2_, MI1_VALi2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | First version after 2 years, update every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MC1_VAL_2_
Product identifier | MC1_VAL_2_ |
Definition | Validation report for 1D C-response |
Input Data | MCR_1DMi2_, MC1_VALi2_ |
Data volume | < 1 Mb per day |
Data format | |
Output Data | PDF file |
Update rate | First version after 2 years, update every year |
Latency | 1 month |
Notes |
External Current Systems
⇒ L2 Cat-1: MMA_SHA_2C
Product identifier | MMA_SHA_2C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Spherical harmonic representation of the large scale magnetospheric field and of its induced counterpart | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | MMA_SHAi2C, MMA_VAL_2_ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | All available quiet time observations from the mission | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Spherical Harmonics of degree and order at least 1 for the external field and of degree and order at least 5 for its Earth induced counterpart | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | Time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | nT | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | ≤ 1 pT | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | Refer to product quality report | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator | Statistics of data misfit provided in the validation report | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data volume | ~2 MB/year | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF Various temporal resolutions may be employed for various external and internal coefficients, hence a number of CDF variable groups are used to store external (named "...qs_N") respectively internal (named "...gh_N") coefficients. Note: the temporal resolutions for the various groups of external and internal coefficients are usually not identical.
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Output data | Time series of external and induced SH coefficients in dipole coordinate frame; root-mean-square differences between (processed) input data and models; number of data from each satellite used for each model; quality flag | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | Time span as input | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | First after 1 year, updated every year | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 1.5 months | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
⇒ L2 Cat-1: MMA_VAL_2C
Product identifier | MMA_VAL_2C |
Definition | Validation report for magnetospheric field model from CI chain |
Input data | MMA_SHAi2C, MMA_SHA_2F, MMA_VALi2C |
Data volume | < 1 Mb per day |
Data format | |
Output data | PDF file |
Update rate | First after 1 year, updated every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MMA_SHA_2F
Product identifier | MMA_SHA_2F | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Spherical harmonic representation of the large scale magnetospheric field and its induced counterpart | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | MAGx_LR_1B, AUX_IGR_2_, AUX_COR_2_, MCO_SHA_2F, MCO_SHA_2C, MCO_SHA_2D, AUX_LIT_2_, MLI_SHA_2C, MIO_SHA_2C, AUX_F10_2_, AUX_IMF_2F, AUX_DST_2_, AUX_KP__2_, AUX_OBS_2_ | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | Full Swarm data set covering at least 30 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Degree 1 spherical Harmonics for the external and internally induced fields | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | Snapshot values 1.5 hours apart. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | See variable ‘Units' in ‘Data format', below. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | See variable ‘Type' in ‘Data format', below. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | Overall uncertainty will include contributions from uncertainties in the Input Data, which are not calculated here. Estimates of the uncertainty resulting from the modeling process after the Input Data has been processed can be obtained from the ‘rms' output variable. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator | Root-mean-square difference between model and (processed) input data; number of data used per model; quality flag. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data volume | ~5 MB/year | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
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Output data | Time series of external and induced SH coefficients in Solar Magnetic and Geographic coordinate frames; root-mean-square differences between (processed) input data and models; number of data from each satellite used for each model; quality flag. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1 day | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | Daily | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | < 1 day | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
⇒ L2 Cat-1: MIO_SHA_2C
Product identifier | MIO_SHA_2C |
Definition | Spherical harmonic representation of the daily geomagnetic variations at mid and low latitudes (Sq and EEJ) |
Input Data | MIO_SHAi2C, MIO_VAL_2_ |
Input time span | All available quiet time observations from the mission |
Spatial representation | Spherical Harmonics up to degree 60 and order 12 in dipole coordinates |
Time representation | Fourier Series, seasonal and daily periodicity |
Units | nT |
Resolution | 1 pT |
Uncertainty | Refer to product quality report |
Quality indicator | Statistics of data misfit provided in the validation report |
Data volume | ~130 kB |
Data format | ASCII listing [AD-15] |
Output data | Coefficients of SH model in dipole coordinates, with seasonal and diurnal periodicity |
Output time span | N/A |
Update rate | First after 1 year, updated every year |
Latency | 1.5 months |
Notes |
⇒ L2 Cat-1: MIO_SHA_2D
Product identifier | MIO_SHA_2D |
Definition | Spherical harmonic representation of the daily geomagnetic variations at mid and low latitudes (Sq and EEJ) |
Input data | MIO_SHAi2D, MIO_VAL_2_ |
Input time span | 3 months to 1 year, to be confirmed and aligned to update rate |
Spatial representation | Spherical Harmonics up to degree 60 and order 12 in dipole coordinates |
Time representation | Fourier Series, seasonal and daily periodicity |
Units | nT |
Resolution | 1 fT |
Uncertainty | Refer to product quality report |
Quality indicator | Statistics of data misfits provided in the validation report |
Data volume | ~ 3.5 Mo' |
Data format | ASCII listing [AD-15] |
Output data | Coefficients of SH model in dipole coordinates, with seasonal and diurnal periodicity |
Output time span | N/A |
Update rate | First after 6 months, 1 year, and update every year |
Latency | 1.5 months |
Notes |
⇒ L2 Cat-1: MIO_VAL_2C
Product identifier | MIO_VAL_2C |
Definition | Validation report for ionospheric field model from CI chain |
Input data | MIO_SHAi2C, MIO_VALi2C |
Data volume | < 1 Mb per day |
Data format | |
Output data | PDF file |
Update rate | First after 1 year, updated every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MIO_VAL_2D
Product identifier | MIO_VAL_2D |
Definition | Validation report for ionospheric field model from dedicated chain |
Input data | MIO_SHAi2D, MIO_VALi2D |
Data volume | < 1 Mb per day |
Data format | |
Output data | PDF file |
Update rate | First after 6 months, 1 year, and update every year |
Latency | 1 month |
Notes |
⇒ L2 Cat-1: MIO_VAL_2_
Product identifier | MIO_VAL_2_ |
Definition | Comparison validation report for ionospheric field model |
Input data | MIO_SHA_2C, MIO_SHA_2D, MIO_VAL_2C, MIO_VAL_2D |
Data volume | < 1 Mb per day |
Data format | |
Output data | PDF file |
Update rate | Each time when both, MIO_SHA_2C and MIO_SHA_2D are released. |
Latency | 1 month |
Notes |
⇒ L2 Cat-2: IBIxTMS_2F
Product identifier | IBIxTMS_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Ionospheric bubble index | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | MAGx_LR_1B, EFIx_PL_1B, Satellite positions, Time stamps (UTC), AUX_IGR_2F, AUX_COR_2F, AUX_LIT_2F, AUX_PMF_2F, AUX_F10_2F, AUX_DST_2F, AUX_IMF_2F, AUX_SWV_2F, AUX_PSM_2F, AUX_PGM_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 3 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | One index per data point (characterising whether the magnetic observation is affected by bubble or not.) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | 1s time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | N/A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | N/A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | N/A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator |
Flags_Bubble:
Flags_B, Flags_F and Flags_q provided in [AD-5]. |
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Data volume | ~4 MB/day/satellite | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1 day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 6 min | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 1 per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
⇒ L2 Cat-2: TECxTMS_2F
Product identifier | TECxTMS_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Time series of the ionospheric total electron content | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | GPS RINEX observation and navigation files (GPSX_RO_1B), Swarm satellite ephemeris (MODX_SC_1B) GPS and Swarm satellite ephemeris (AUX_GPSEPH) GPS transmitter biases(AUX_DCB_2F) Leap seconds (AUX_USLEAP) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 3 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Line representation of GPS –Swarm link | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | 10-s time series for TEC and 1 day for DCB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | TECU (1016 electrons/m2) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | 1E-8 TECU | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | 2 TECU | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator | Relative_STEC_RMS (RMS deviation between code and carrier phases) and DCB_Error | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data volume | ~4 MB / day / satellite | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1 day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 6 min | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 1 per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes | It is recommended to use absolute VTEC data with corresponding elevation angles of the GPS rays of at least 50°. |
⇒ L2 Cat-2: FAC_TMS_2F
Product identifier | FAC_TMS_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition |
Time series of field-aligned and radial current densities along the orbit using the dual-satellite method. Field-aligned current (FAC) density is derived by the multiplication of the radial current (IRC) density with the inclination angle of the geomagnetic field. The field-aligned current density can only be calculated at latitudes, where the magnetic field is well inclined, i.e. |I| > 30°. Near the magnetic equator for magnetic inclination angles |I| < 30° FAC values are set to NaN. The radial current density can be provided along the whole orbit, except for latitudes θ>86° (near poles), where both FAC and IRC values are set to NaN. Note that the magnetic field data used for the dual-satellite method is low-pass filtered with a 3-dB cutoff period of 20 s (corresponding to a wavelength of 150 km). This step is indispensable because the lateral distance between Swarm A and Swarm C has to be taken into account. |
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Input data | MAGA_LR_1B, MAGC_LR_1B, Time stamps (UTC), AUX_IGR_2F, AUX_COR_2F, AUX_LIT_2F, AUX_PMF_2F, AUX_F10_2F, AUX_DST_2F, AUX_IMF_2F, AUX_SWV_2F, AUX_PSM_2F, AUX_PGM_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 3 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Current density estimates along entire orbits at positions between SwA and SwC | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | Time series of current density, Δt=1sec | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | Current density: µA/m2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | Current density: 1E-6 µA/m2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | 50 nA/m2 for periods 10s to 90min on top of constant bias of <200nA/m2, for latitudes below 80°, gradually degrading between 80° to 86°, no values beyond 86° | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator |
Flags:
A table below presents the list of 10 individual and independent digits, characterizing the FAC-dual (FAC_TMS_2F) product quality. Digits from 1 to 8 report issues that may have been occurred at one or more of the measurement points used for the computation of a current density value. Digits 9 and 10 report whether the NaN values for the current density were used or not. Values N>0 mark the number of measurement points that were affected and value 0 marks not affected ones. For FAC-dual N can be equal to 1, 2, 3, or 4.
Flags_B, Flags_F and Flags_q are handed through from Level 1b processing [AD-5]. |
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Data volume | 5 MB per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1day | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 1 per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 10 min | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
⇒ L2 Cat-2: FACxTMS_2F
Product identifier | FACxTMS_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Time series of field-aligned and radial current densities along the orbit from single satellite measurements. Field-aligned current (FAC) density is derived by the multiplication of the radial current (IRC) density with the inclination angle of the geomagnetic field. The field-aligned current density can only be calculated at latitudes, where the magnetic field is well inclined, i.e. |I| > 30°. Near the magnetic equator for magnetic inclination angles |I| < 30° FAC values are set to NaN. The radial current density can be provided along the whole orbit. Scale size >7.5 km. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | MAGx_LR_1B, Satellite positions, Time stamps (UTC), AUX_IGR_2F, AUX_COR_2F, AUX_LIT_2F, AUX_PMF_2F, AUX_F10_2F, AUX_DST_2F, AUX_IMF_2F, AUX_SWV_2F, AUX_PSM_2F, AUX_PGM_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 3 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Current density estimates along entire orbits at positions of SwA, SwB, and SwC. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | Time series of current density, Δt=1sec | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | Current density: µA/m2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | Current density: 1E-6 µA/m2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | less than FAC_TMS_2F, 70 nA/m2 on top of constant bias of <200nA/m2, for latitudes below 80°, gradually degrading between 80° to 86°, no values beyond 86° | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator |
Flags:
A table below presents the list of 10 individual and independent digits, characterizing the FAC-single (FACxTMS_2F) product quality. Digits from 1 to 8 report issues that may have been occurred at one or more of the measurement points used for the computation of a current density value. Digits 9 and 10 report whether the NaN values for the current density were used or not. Values N>0 mark the number of measurement points that were affected and value 0 marks not affected ones. For FAC-single N can be equal to 1 or 2.
Flags_B, Flags_F and Flags_q are handed through from Level 1b processing [AD-5]. |
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Data volume | 5MB per day, per satellite | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1day | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 10 min | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 1 per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
⇒ L2 Cat-2: EEFxTMS_2F
Product identifier | EEFxTMS_2F | ||||||||||||||||||||||||||||||||||||||
Definition | Dayside equatorial electric field | ||||||||||||||||||||||||||||||||||||||
Input data | MAGx_LR_1B, AUX_DST_2F, AUX_KP__2F , AUX_F10_2F, AUX_IGR_2F, AUX_COR_2F, AUX_LIT_2F, AUX_PMF_2F, AUX_PSM_2F, AUX_PGM_2F, AUX_IRZ_2F | ||||||||||||||||||||||||||||||||||||||
Input time span | Every dayside equator crossing ±20 minutes | ||||||||||||||||||||||||||||||||||||||
Spatial representation | One longitude/latitude pair (on the magnetic equator ) for each output value | ||||||||||||||||||||||||||||||||||||||
Time representation | Single values at time of dayside equator crossing | ||||||||||||||||||||||||||||||||||||||
Units | V/m | ||||||||||||||||||||||||||||||||||||||
Resolution | 0.1 mV/m | ||||||||||||||||||||||||||||||||||||||
Uncertainty | 0.1 mV/m | ||||||||||||||||||||||||||||||||||||||
Quality indicator | Relative error between modeled and observed current profile | ||||||||||||||||||||||||||||||||||||||
Data volume | < 2 kB | ||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data |
CDF file with time series |
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Output time span | Continuous for entire mission. One value for each day-side equator crossing (90 minute sampling for day-night local time orbits, 45 minutes for dawn-dusk orbits) | ||||||||||||||||||||||||||||||||||||||
Update rate | One output file per day | ||||||||||||||||||||||||||||||||||||||
Latency | 20 minutes | ||||||||||||||||||||||||||||||||||||||
Notes |
Precise Orbit Determination
⇒ L2 Cat-1: SP3xCOM_2_
Product identifier | SP3xCOM_2_ |
Definition | Time series of dynamic position and velocity of the center of mass of each satellite in the ITRF (Earth-fixed) frame |
Input Data | GPSA_RO_1B, GPSB_RO_1B, GPSC_RO_1B, STRAATT_1B, STRBATT_1B, STRCATT_1B, MODA_SC_1B, MODB_SC_1B, MODC_SC_1B, External data from IGS, IERS, CODE |
Input Time Span | 30 hr (daily batches with overlap) |
Spatial representation | N/A |
Time representation | GPS time (seconds – s), time step = 10 s |
Units | km for position, dm/s for velocity |
Resolution | 1 ps for time, mm for position, 0.1 μm/s for velocity |
Uncertainty | 10 cm 3D for position |
Quality indicator | Validation report SP3xVAL_2_ |
Data volume | < 2 Megabyte (MB) per satellite per day |
Data format | SP3c [AD-15] |
Output Data | SP3c file |
Output time span | 24 hr |
Update rate | Daily |
Latency | 21 days |
Notes |
Central 24 hr of input time span will be selected for SP3 product Quality report will be provided as separate Level 2 product |
⇒ L2 Cat-1: SP3xKIN_2_
Product identifier | SP3xKIN_2_ |
Definition | Time series of kinematic position of the center of mass of each satellite in the ITRF (Earth-fixed) frame |
Input Data | GPSA_RO_1B, GPSB_RO_1B, GPSC_RO_1B, STRAATT_1B, STRBATT_1B, STRCATT_1B, MODA_SC_1B, MODB_SC_1B, MODC_SC_1B, External data from IGS, IERS, CODE |
Input Time Span | 30 hr (daily batches with overlap) |
Spatial representation | N/A |
Time representation | GPS time (seconds – s), observation epochs |
Units | km for position, dm/s for velocity |
Resolution | 1 ps for time, mm for position, 0.1 μm/s for velocity |
Uncertainty | 10 cm 3D for position |
Quality indicator | Validation report SP3xVAL_2_ |
Data volume | < 15 Megabyte (MB) per satellite per day |
Data format | SP3c [AD-15] |
Output Data | SP3c file |
Output time span | 24 hr |
Update rate | Daily |
Latency | 21 days |
Notes |
Central 24 hr of input time span will be selected for SP3 product Quality report will be provided as separate Level 2 product |
⇒ L2 Cat-1: SP3xVAL_2_
Product identifier | SP3xVAL_2_ |
Definition | Validation report for precise orbit solutions SP3xCOM_2_ and SP3xKIN_2_ |
Input Data |
SP3xCOM_2_, SP3xKIN_2_, ILRS Swarm tracking data, Diagnostic and statistical output from orbit determination process
|
Input Time Span | 30 hr |
Data volume | < 20 Mb per satellite per day |
Data format | |
Output Data | PDF file |
Output time span | 24 hr |
Update rate | 1 day |
Latency | 21 per day |
Notes | 30 hr time input time span includes overlaps between consecutive orbit solutions |
⇒ L2 Cat-1: ACCxPOD_2_
Product identifier | ACCxPOD_2_ | |||||||||||||||
Definition | Time series of non-gravitational accelerations obtained by POD | |||||||||||||||
Input data | SP3xCOM_2_, GPSx_RO_1B, STRxATT_1B, ACCx_PR_1B, External data from CODE | |||||||||||||||
Input time span | 30 hr (daily batches with overlap) | |||||||||||||||
Spatial representation | N/A | |||||||||||||||
Time representation | UTC (seconds – s), time step = 30 sec | |||||||||||||||
Units | m/s2 | |||||||||||||||
Resolution | 64 bit double precision floating point number format | |||||||||||||||
Uncertainty | 10-7 m/s2 variance for along-track and cross-track directions | |||||||||||||||
Quality indicator | Validation report DNSxVAL_2_ | |||||||||||||||
Data volume | < 10 Kb per satellite per day | |||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series of accelerations | |||||||||||||||
Output time span | 24 hr | |||||||||||||||
Update rate | 1 day | |||||||||||||||
Latency | 21 days | |||||||||||||||
Notes |
Version 0201 data is computed from GPS data using a Kalman filter approach. The reduced-dynamic orbit is used as a priori reference orbit. The level 1B accelerometer files are only used for spacecraft mass and CoG information |
Accelerometry
⇒ L2 Cat-1: ACCxCAL_2_
Product identifier | ACCxCAL_2_ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition | Time series of corrected and calibrated acceleration, including all corrections and calibration parameters | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input data | ACCx_PR_1B, ACCxPOD_2_, ACCxDISi2_ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 24 h | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Three-dimensional time series along satellite orbit | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | UTC | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | m/s2 for accelerometer biases, dimensionless for scale factors | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | 64 bit double precision floating point number format | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | 0.01 scale factor for flight direction, 10-7 m/s2 for along-track bias | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator |
Validation report ACCxVAL_2_ Global attribute "DAILY_QUALITY_INDEX" of Type CDF_REAL, which ranges from 1.0 (good data quality) to 5.0 (bad data quality) |
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Data volume | 15 MB per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with corrected and calibrated accelerations from the accelerometer, all corrections and calibration parameters, and flags; sampling rate is 1 Hz (accelerations are at original measurement epochs) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1 day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 3 months | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 1 month | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes |
All accelerations are provided in the CRF (x-direction is roughly along-track, y-direction is roughly cross-track, z-direction is roughly nadir)
Calibration was performed against non-gravitational accelerations from POD that are contained in product ACCxPOD_2_ Preliminary bias will be replaced by final bias in aerodynamic accelerations in product ACCx_AE_2_ |
⇒ L2 Cat-1: ACCxVAL_2_
Product identifier | ACCxVAL_2_ |
Definition | Validation report for measured, modeled and POD accelerations ACCxCAL_2_, ACCx_FMi2_ and ACCxPOD_2_ |
Input data | ACCxDISi2_, ACCxCAL_2_, ACCxPOD_2_, ACCx_FMi2_ |
Input time span | Variable |
Data volume | – 10 MB / day |
Output data | |
Output time span | Variable |
Update rate | 3 months |
Latency | 1 month |
Magnetic Forcing of the Upper Atmosphere
⇒ L2 Cat-1: ACCx_AE_2_
Product identifier | ACCx_AE_2_ | ||||||||||||||||||||
Definition | Time series of calibrated accelerometer data, pre-processed to represent external non-gravitational forces and aerodynamic accelerations | ||||||||||||||||||||
Input data | ACCx_PR_1B, STRxATT_1B, SP3xCOM_2_, ACCxCAL_2_, ACCxPOD_2_, AUX_F10_2_, AUX_KP__2_, External data from IERS | ||||||||||||||||||||
Input time span | 24 hr | ||||||||||||||||||||
Spatial representation | Time-series along satellite track, altitude (m), latitude (deg), longitude (deg) and local solar time (hours) available based on MODX_SC_1B | ||||||||||||||||||||
Time representation | UTC (seconds – s), nominally with 10 s time step | ||||||||||||||||||||
Units | nm/s2 for accelerations, s for time, m for altitude, degrees for latitude, longitude, hours for local solar time | ||||||||||||||||||||
Resolution | 64 bit double precision floating point number format | ||||||||||||||||||||
Uncertainty | N/A | ||||||||||||||||||||
Quality indicator | Validation report TDAxVAL_2_ | ||||||||||||||||||||
Data volume | < 10 Mbyte per satellite per day | ||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | ||||||||||||||||||||
Output time span | 24 hr | ||||||||||||||||||||
Update rate | 1 day | ||||||||||||||||||||
Latency | 21 days | ||||||||||||||||||||
Notes | The applied accelerometer bias and scale factors are available in the metadata. |
⇒ L2 Cat-1: DNSxPOD_2_
Product identifier | DNSxPOD_2_ | |||||||||||||||||||||||||||||||||||
Definition | Thermospheric density at the satellite location along with auxiliary parameters (altitude, latitude, longitude and local solar time). Derived from non-gravitational accelerations based on precise orbit determination data only (ACCxPOD_2_) | |||||||||||||||||||||||||||||||||||
Input data | MODx_SC_1B, STRxATT_1B, ACCx_PR_1B, ACCx_FMi2_, GPSx_RO_1B, ACCxPOD_2_ | |||||||||||||||||||||||||||||||||||
Input time span | 24 hr | |||||||||||||||||||||||||||||||||||
Spatial representation | Time-series along satellite track, altitude (m), latitude (deg), longitude (deg) and local solar time (hours) available based on MODx_SC_1B | |||||||||||||||||||||||||||||||||||
Time representation | UUTC (seconds – s), nominally with 30 s time step, as well as orbital averages | |||||||||||||||||||||||||||||||||||
Units | kg/m3 for density | |||||||||||||||||||||||||||||||||||
Resolution | 64 bit double precision floating point number format | |||||||||||||||||||||||||||||||||||
Uncertainty | 30% of variance from models for neutral density | |||||||||||||||||||||||||||||||||||
Quality indicator | Validation report DNSxVAL_2_ | |||||||||||||||||||||||||||||||||||
Data volume | < 160 Kbyte per satellite per day | |||||||||||||||||||||||||||||||||||
Data format |
CDF
|
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Output data | CDF file with time series | |||||||||||||||||||||||||||||||||||
Output time span | 24 hr | |||||||||||||||||||||||||||||||||||
Update rate | 1 day | |||||||||||||||||||||||||||||||||||
Latency | 21 days | |||||||||||||||||||||||||||||||||||
Notes |
The density data is derived from the ACCxPOD non-gravitational acceleration component along the spacecraft X-axis. The following processing steps have been performed: - Modelled radiation pressure accelerations have been subtracted from the full non-gravitational accelerations, to arrive at aerodynamic accelerations. Because the Kalman filter approach results in a smoothed representation of true accelerations, the radiation pressure model output has been smoothed as well, in order to avoid density jump artefacts at eclipse transitions. - The resulting aerodynamic accelerations are converted into densities, using an aerodynamic model based on a panelised representation of the satellite. The gas-surface interaction is based on diffuse reflection, and an energy accommodation coefficient of 0.93 is used. - The densities are multiplied by a factor of 1.32, to compensate for the observed difference in scale between the panelised aerodynamic model, and an aerodynamic model based on a more accurate representation of the geometry of the Swarm satellites. The more accurate model will be implemented in a future updated version of the data. - The density_orbitmean field contains the mean density, taken over one orbital period, for each time step.The orbital period in seconds is provided as metadata in the CDF file. At high altitude and low solar activity, the errors inherent in the radiation pressure model and acceleration determination using GPS data can become significant compared to the magnitude of the acceleration signal. This can result in large density errors and even negative densities. Users are advised to use the orbit mean densities in those conditions. |
⇒ L2 Cat-1: DNSxACC_2_
Product identifier | DNSxACC_2_ | |||||||||||||||||||||||||||||||||||
Definition | Thermospheric density at the satellite location | |||||||||||||||||||||||||||||||||||
Input data | STRxATT_1B, ACCx_PR_1B, ACCx_AE_2_, SP3_COM__2, AUX_IER_2_, AUX_AER_2_, AUX_F10_2_, AUX_KP__2_, External data from IERS | |||||||||||||||||||||||||||||||||||
Input time span | 24 hr | |||||||||||||||||||||||||||||||||||
Spatial representation | Time-series along satellite track, altitude (m), latitude (deg), longitude (deg) and local solar time (hours) available based on MODX_SC_1B | |||||||||||||||||||||||||||||||||||
Time representation | UTC (seconds – s), nominally with 10 s time step | |||||||||||||||||||||||||||||||||||
Units | kg/m3 for density, m/s for wind speed | |||||||||||||||||||||||||||||||||||
Resolution | 64 bit double precision floating point number format | |||||||||||||||||||||||||||||||||||
Uncertainty | 30% of variance from models for neutral density | |||||||||||||||||||||||||||||||||||
Quality indicator | Validation report TDAxVAL_2_ | |||||||||||||||||||||||||||||||||||
Data volume | < 15 Mbyte per satellite per day | |||||||||||||||||||||||||||||||||||
Data format |
CDF
|
|||||||||||||||||||||||||||||||||||
Output data | CDF file with time series | |||||||||||||||||||||||||||||||||||
Output time span | 24 hr | |||||||||||||||||||||||||||||||||||
Update rate | 1 day | |||||||||||||||||||||||||||||||||||
Latency | 21 days | |||||||||||||||||||||||||||||||||||
Notes |
Swarm DISC Products
⇒ L2: IPDxIRR_2F
Product identifier | IPD_IPR_2F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Definition |
Time series of characteristics of the plasma density and plasma irregularities along the orbit from single satellite measurements. Time series of local plasma conditions, including background density and total electron content. Data related to geomagnetic regions in the ionosphere. Indication of severity of plasma irregularities for ground-based users provided |
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Input data | EFI_LP_1B, TECxTMS_2F, AOBxFAC_2F, IBIxTMS_2F, PCP – Polar Cap Products | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Input time span | 3 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Spatial representation | Data provided along entire orbits at positions of SwA, SwB, and SwC | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Time representation | 1 second time series (the electron density data are downsampled to 1 second resolution; the timestamp of the electron density and TEC data are rounded to the nearest integer UTC seconds) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Units | See data format table | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Resolution | Temporal data resolution of 1 second, density variations estimated at 0.5 second resolution | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncertainty | N/A | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Quality indicator | Quality flags are handed through from Level 1b and Level 2 processing which is used as input data | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data volume | ca.10 MB per day, per satellite | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Data format | CDF | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output data |
CDF file with time series
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Output time span | 1 day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Update rate | 1 per day | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Latency | 10 min | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes | The meanings of the PCP_flag are as follows: 0 if the plasma density measurement occurred outside a polar cap patch. 1 if the plasma density measurement occurred at one of the edges of a polar cap patch (no plasma velocity measurements are available). 2 if the plasma density measurement occurred at the leading edge of a polar cap patch. 3 if the plasma density measurement occurred at the trailing edge of a polar cap patch. 4 if the plasma density measurement occurred inside a polar cap patch proper. When no ion drift data is available, the leading and trailing edges cannot be distinguished. In this case the polar cap patch flag is set to 4 throughout the patch proper and to 1 throughout both edges |
Processing Chains of Level 2 Products

Figure 1: L2 chain
Figure 2: L2 processing chains which result in magnetic L2 products
Figure 3: L2 processing chains that result in precise orbits and thermosphere L2 products
Figure 4: L2 processing chains related to the Earth environment and space weather (Cat-2 products)
Information on all periods of planned and unplanned unavailability of CryoSat SIRAL data is provided below.
Lists of the unavailability periods for each year of the mission (and the full mission) are available as downloadable files:
Year
|
PDF file
|
Excel file
|
2019
|
||
2018
|
||
2017
|
||
2016
|
||
2015
|
||
2014
|
||
2013
|
||
2012
|
||
2011
|
||
2010
|
||
Full mission
(2010 – present) |
The unavailability periods from the last 6 months are listed below:
Unavailability Start
Time (UTC) |
Unavailability Stop
Time (UTC) |
Planned/
Unplanned |
Reason
|
SIRAL Mode Affected
|
2019-02-14 09:05:09
|
2019-02-14 11:00:07
|
Planned
|
Orbit Manoeuvre
|
All
|
2019-01-24 11:57:43
|
2019-01-24 12:16:02
|
Planned
|
On-board Maintenance
|
All
|
2018-12-22 21:20:22
|
2018-12-23 00:28:10
|
Planned
|
Orbit Manoeuvre
|
All
|
2018-12-13 13:54:52
|
2018-12-13 14:14:48
|
Planned
|
On-board Maintenance
|
All
|
2018-12-13 07:09:56
|
2018-12-13 08:56:17
|
Planned
|
Orbit Manoeuvre
|
All
|
2018-11-15 08:33:44
|
2018-11-15 10:19:43
|
Planned
|
Orbit Manoeuvre
|
All
|
2018-11-08 07:54:29
|
2018-11-08 08:15:02
|
Planned
|
On-board Maintenance
|
All
|
2018-10-04 09:26:50
|
2018-10-04 11:10:13
|
Planned
|
On-board Maintenance
|
All
|
2018-08-01 18:43:44
|
2018-08-02 16:30:58
|
Unplanned
|
Platform Anomaly |
All
|
2018-07-29 11:37:24
|
2018-07-29 13:16:20
|
Unplanned
|
Ground Segment Anomaly |
SAR & SARIN
|
2018-07-29 04:55:48
|
2018-07-29 08:10:40
|
Unplanned
|
Ground Segment Anomaly |
SARIN
|
2018-07-20 00:04:55
|
2018-07-20 00:08:22
|
Unplanned
|
Ground Segment Anomaly |
SAR
|
2018-07-12 04:30:27
|
2018-07-12 07:55:51
|
Planned
|
Orbit Manoeuvre |
All
|
2018-07-09 02:54:30
|
2018-07-09 04:42:04
|
Planned
|
Orbit Manoeuvre |
All
|
2018-07-03 12:07:52
|
2018-07-03 14:03:02
|
Planned
|
Orbit Manoeuvre |
All
|
Back to Daily Performance Reports
The following performance reports are available:
January | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
February | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | - | - | - |
March | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
April | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
May | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
June | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
July | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
August | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
September | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
October | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
November | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | - |
December | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Back to Daily Performance Reports
The following performance reports are available:
Back to Daily Performance Reports
The following performance reports are available:
Back to Daily Performance Reports
The following performance reports are available:
Back to Daily Performance Reports
The following performance reports are available: