ESA Earth Home Missions Data Products Resources Applications
    24-Jul-2014
EO Data Access
How to Apply
How to Access
Index
MIPAS Data Formats Products
Records
2 MDSR per MDS 1 forward sweep 1 reverse sweep
2 MDSRs per MDS 1 forward sweep 1 reverse sweep
LOS calibration GADS
Spectral Lines MDS
P T Retrieval MW ADS
VMR Retrieval Parameters GADS
P t Retrieval GADS
Framework Parameters GADS
Processing Parameters GADS
Inverse LOS VCM matrices MDS
General GADS
Occupation matrices for vmr#1 retrieval MDS
MDS2 -- 1 mdsr forward sweep 1 mdsr reverse
Occupation matrices for p T retrieval MDS
General GADS
Priority of p T retrieval occupation matices
P T occupation matrices ADS
MIP_NLE_2P SPH
Summary Quality ADS
Instrument and Processing Parameters ADS
Microwindows occupation matrices for p T and trace gas retrievals
Scan information MDS
Level 2 product SPH
MDS1 -- 1 mdsr forward sweep 1 mdsr reverse sweep
H2O Target Species MDS
P T and Height Correction Profiles MDS
Continuum Contribution and Radiance Offset MDS
Structure ADS
Summary Quality ADS
Residual Spectra mean values and standard deviation data ADS
PCD Information of Individual Scans ADS
Instrument and Processing Parameters ADS
Microwindows Occupation Matrices ADS
Scan Information MDS
1 MDSR per MDS
Scan Geolocation ADS
Mipas Level 1B SPH
Calibrated Spectra MDS
Structure ADS
Summary Quality ADS
Offset Calibration ADS
Scan Information ADS
Geolocation ADS (LADS)
Gain Calibration ADS #2
Gain Calibration ADS #1
Level 0 SPH
DSD#1 for MDS containing VMR retrieval microwindows data
DSD for MDS containing p T retrieval microwindows data
VMR #1 retrieval microwindows ADS
P T retrieval microwindows ADS
1 MDSR per MDS
VMR profiles MDS (same format as for MIP_IG2_AX)
Temperature profiles MDS (same format as for MIP_IG2_AX)
Pressure profile MDS (same format as for MIP_IG2_AX)
P T continuum profiles MDS (same format as for MIP_IG2_AX)
GADS General (same format as for MIP_IG2_AX)
Level 0 MDSR
Values of unknown parameters MDS
Computed spectra MDS
Jacobian matrices MDS
General data
Data depending on occupation matrix location ADS
Microwindow grouping data ADS
LUTs for p T retrieval microwindows MDS
GADS General
P T retrieval microwindows ADS
ILS Calibration GADS
Auxilliary Products
MIP_MW1_AX: Level 1B Microwindow dictionary
MIP_IG2_AX: Initial Guess Profile data
MIP_FM2_AX: Forward Calculation Results
MIP_CS2_AX: Cross Sections Lookup Table
MIP_CS1_AX: MIPAS ILS and Spectral calibration
MIP_CO1_AX: MIPAS offset validation
MIP_CL1_AX: Line of sight calibration
MIP_CG1_AX: MIPAS Gain calibration
MIP_SP2_AX: Spectroscopic data
MIP_PS2_AX: Level 2 Processing Parameters
MIP_PS1_AX: Level 1B Processing Parameters
MIP_PI2_AX: A Priori Pointing Information
MIP_OM2_AX: Microwindow Occupation Matrix
MIP_MW2_AX: Level 2 Microwindows data
MIP_CA1_AX: Instrument characterization data
Level 0 Products
MIP_RW__0P: MIPAS Raw Data and SPE Self Test Mode
MIP_NL__0P: MIPAS Nominal Level 0
MIP_LS__0P: MIPAS Line of Sight (LOS) Level 0
Level 1 Products
MIP_NL__1P: MIPAS Geolocated and Calibrated Spectra
Level 2 Products
MIP_NLE_2P: MIPAS Extracted Temperature , Pressure and Atmospheric Constituents Profiles
MIP_NL__2P: MIPAS Temperature , Pressure and Atmospheric Constituents Profiles
Glossary
References
Glossaries of technical terms
Level 2 processing
Pointing
Miscellaneous hardware and optical terms
Spectrometry and radiometry
Data Processing
Alphabetical index of technical terms
Frequently Asked Questions
The MIPAS Instrument
Inflight performance verification
Instrument characteristics and performances
Preflight characteristics and expected performances
Subsystem description
Payload description and position on the platform
MIPAS Products and Algorithms
Data handling cookbook
Characterisation and calibration
Calibration
Latency, throughput and data volume
Auxiliary products
Level 2
Instrument specific topics
Algorithms and products
Level 2 products and algorithms
Products
The retrieval modules
Computation of cross-sections
Level 1b products and algorithms
Products
Calculate ILS Retrieval function
Level 1a intermediary products and algorithms
Product evolution history
Definition and convention
MIPAS Products User Guide
Image gallery
Further reading
How to use MIPAS data?
Summary of applications and products
Peculiarities of MIPAS
Geophysical coverage
Principles of measurement
Scientific background
MIPAS Product Handbook
Services
Site Map
Frequently asked questions
Glossary
Credits
Terms of use
Contact us
Search


 
 
 


2.8 Characterisation and calibration

2.8.1 Characterisation

Prior to launch several parameters of MIPAS had to be characterised on the ground. Some of these parameters were measured to verify the functionality and performance of the instrument. Other measurements were made to characterise the instrument and obtain sets of parameters that would later be used by some functions the level 1b processing such non-linearity correction and ILS retrieval.
The table below lists the system-level parameters characterised on the ground.
 
 
Table 2.12
Functional Characterisation
Parameter Testing conditions Data product Uncertainty Remark
FOV mapping 128 um pinhole
Hot source at 615 K
FOV alignment 4% MIO at thermal extremes
ZPD centre Nominal mode Fringe count error - MIO at mean temperature
Analogue gain OCB at 250 K and DSS
CBA at 220 K and DSS
Adjustement of ZPD
amplitude vs. gain
- MIO at mean temperature
ODS and SPE check Raw data mode Band D ODS laser frequency
SPE numerical filters
0.1 cm-1 MIO at mean temperature
 Characterisation parameters
Parameters Testing conditions Data product Uncertainty Remark
 Aliasing verification  CBA and OCB at 250 K  Rejection level of filters 0.1%   MIO at mean temperature
 Band combination Band C and D
OCB at 230 K and DSS
SPE combination
filters
 -  MIO at mean temperature
 High-resolution
feature
 CBA and OCB at 250 K
and DSS
absence of feature
< 0.25 cm-1
 30% of radiometric
accuracy
 MIO at mean temperature
 Non-linearity  CBA at 210,222, 233,
242 and 250 K
 Response vs. signal
amplitude; non-linearity
coefficients
 0.2%  MIO at mean temperature
 Radiometric  CBA and OCB at 220 K
and DSS
 gain and offset  30% of radiometric
accuracy
 MIO at mean temperature
Spectral characterisitics
 Parameters Testing conditions  Data product  Uncertainty  Remark 
 Spectral stability OCB at 300K
Band D
Stability of spectral line
during 165 sec 
 0.001 cm-1  MIO at thermal extremes
and mean temperature
Spectral resolution Band D FWHM of ILS 0.001 cm-1  MIO at thermal extremes
Spectral linearity OCB at 250K Spectral position
rms error
0.001 cm-1  MIO at thermal extremes
ILS stability OCB at 300K ILS shape during
5 days
0.1 to 0.2% MIO at thermal extremes
and mean temperature
ILS morphology OCB at 300K ILS model parameters 1% MIO at thermal extremes
and mean temperature
Radiometric measurements
Parameters Testing conditions Data product Uncertainty Remark
Dark NESR DSS Instrument noise  30% of radiometric
accuracy
MIO at warmest 
temperature
NESR OCB at 180, 207, 220,
230 and 250 K
Total noise  30% of radiometric
accuracy
MIO at warmest 
temperature
Radiometric accuracy OCB at 230 K, DSS accuracy better than 2xNESR
+x% of source radiance
(x=5 (band A) to 1 (band D))
 30% of radiometric
accuracy
MIO at thermal extremes
and mean temperature
Dynamic range OCB at 180, 207, 220,
230 and 250 K
Adequate range up to
270 K
- MIO at warmest 
temperature
Damage limit OCB at 400 K no damage verification - MIO at warmest 
temperature
Line of sight
Parameters Testing conditions Data product Uncertainty Remark
LOS elevation
and azimuth 
50 um pinhole
Band D
LOS algorithm verification
Datation verification
- MIO at mean temperature

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry