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- Data (1)
- News (13)
- Missions (1)
- Events (5)
- Tools (1)
- Activities (4)
- Documents (16)
Activity - Projects
TOLEOS
The TOLEOS (Thermosphere Observations from Low-Earth Orbiting Satellites) project will produce thermosphere mass density observations from the accelerometer measurements of the GRACE, GRACE-FO, and CHAMP satellites.
Document - General Reference
Third Party Missions Brochure
This brochure summarises ESA's Third Party Missions programme, providing a timeline and examples of content related to some of the missions.
Document - General Reference
The International Charter- Space and Major Disasters
The Charter is an important step forward in linking the needs of disaster and relief organisations with space technology solutions to help mitigate the effects of disaster on human life, property and the environment.
News - Success Stories
The Earthnet Programme: 40 years of evolution and future challenges
ESA's Earthnet Programme provided the initial means to access and exploit Earth Observation data.
News - Data Release news
Reprocessed GRACE-FO thermosphere data available on Swarm dissemination Server
An updated version of the GRACE Follow-On dataset for thermosphere density and crosswind data has been published on the Swarm dissemination server.
Document - General Reference
PREMIER-Report-for-Mission-Selection-An-Earth-Explorer-to-observe-atmospheric-composition.pdf
The objective of the PREMIER mission is to quantify the processes controlling global atmospheric composition in the mid/upper troposphere and lower stratosphere (5-25 km height range), which is a region of particular importance for climate change.
News - Data Release news
New Swarm-TIRO dataset released
A new dataset, generated in the frame of Swarm-TIRO (Topside Ionosphere Radio Observations from multiple LEO-missions) project, is available.
News - Data Release news
New Release of GRACE Thermosphere Crosswind Data
An updated version of the GRACE thermosphere crosswind data (Version 0002), featuring improved flagging, is available on the Swarm dissemination server.
News - Data Release news
New GRACE and GRACE-FO thermosphere datasets released
The Swarm DISC project Thermosphere Observations from Low-Earth Orbiting Satellites (TOLEOS) reprocessed all GRACE and GRACE-FO data to obtain new thermosphere density and crosswind datasets.
Activity - Projects
Multi-Approach Gravity Field models from Swarm GPS data
Multi-Approach Gravity Field models from Swarm GPS data project aims to provide quality gravity field models from Swarm data that constitute an alternative and independent source of gravimetric data.
Event - Conference
Living Planet Symposium 2022
Learn about the 2022 edition of ESA's Living Planet Symposium.
News - General News
Introducing the Newest ESA Third Party Missions
ESA's Earth Observation Programme Board has unanimously approved the integration of the Federated Satellite Systems (FSSCat) mission, the Geostationary Environment Monitoring Spectrometer (GEMS) instrument on-board the GEO-KOMPSAT-2B satellite and the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission, as Third Party Missions.
News - General News
International collaboration: Summarising ESA’s Third Party Missions
ESA’s Third Party Missions programme consists of more than 50 missions from around the world. Learn more about the Third Party Missions in this video.
Document - General Reference
Heritage Space Programme interactive brochure
Learn about ESA's Heritage Space Programme in this interactive brochure.
Document - General Reference
Heritage Missions brochure
This brochure describes ESA's Heritage Space Programme and includes infographics describing some of the missions in the programme.
Document - Product Handbook
GRACE-L1B-Handbook-v1.3.pdf
The purpose of this document is to assist investigators of the Gravity Recovery and Climate Experiment (GRACE) Mission by providing a comprehensive description of the content and format of the GRACE Level 1B data.
Data - Data Description
GRACE-A and GRACE-B Level 1B, Level 1B combined and Level 2 Data Products
Level-1A Data Products are the result of a non-destructive processing applied to the Level-0 data at NASA/JPL. The sensor calibration factors are applied in order to convert the binary encoded measurements to engineering units. Where necessary, time tag integer second ambiguity is resolved and data are time tagged to the respective satellite receiver clock time. Editing and quality control flags are added, and the data is reformatted for further processing. The Level-1A data are reversible to Level-0, except for the bad data packets. This level also includes the ancillary data products needed for processing to the next data level. The Level-1B Data Products are the result of a possibly destructive, or irreversible, processing applied to both the Level-1A and Level-0 data at NASA/JPL. The data are correctly time-tagged, and data sample rate is reduced from the higher rates of the previous levels. Collectively, the processing from Level-0 to Level-1B is called the Level-1 Processing. This level also includes the ancillary data products generated during this processing, and the additional data needed for further processing. The Level-2 data products include the static and time-variable (monthly) gravity field and related data products derived from the application of Level-2 processing at GFZ, UTCSR and JPL to the previous level data products. This level also includes the ancillary data products such as GFZ's Level-1B short-term atmosphere and ocean de-aliasing product (AOD1B) generated during this processing. GRACE-A and GRACE-B Level-1B Data Product: Satellite clock solution [GA-OG-1B-CLKDAT, GB-OG-1B-CLKDAT, GRACE CLKDAT]: Offset of the satellite receiver clock relative to GPS time, obtained by linear fit to raw on-board clock offset estimates GPS flight data [GA-OG-1B-GPSDAT, GB-OG-1B-GPSDAT, GRACE GPSDAT]: Preprocessed and calibrated GPS code and phase tracking data edited and decimated from instrument high-rate (10 s (code) or 1 s (phase)) to low-rate (10 s) samples for science use (1 file per day, level-1 format) Accelerometer Housekeeping data [GA-OG-1B-ACCHKP, GB-OG-1B-ACCHKP, GRACE ACCHKP]: Accelerometer proof-mass bias voltages, capacitive sensor outputs, instrument control unit (ICU) and sensor unit (SU) temperatures, reference voltages, primary and secondary power supply voltages (1 file per day, level-1 format) Accelerometer data [GA-OG-1B-ACCDAT, GB-OG-1B-ACCDAT, GRACE ACCDAT]: Preprocessed and calibrated Level-1B accelerometer data edited and decimated from instrument high-rate (0.1 s) to low-rate (1s) samples for science use (1 file per day, level-1 format) Intermediate clock solution [GA-OG-1B-INTCLK, GB-OG-1B-INTCLK, GRACE INTCLK]: derived with GIPSY POD software (300 s sample rate) (1 file per day, GIPSY format) Instrument processing unit (IPU) Housekeeping data [GA-OG-1B-IPUHKP, GB-OG-1B-IPUHKP, GRACE IPUHKP]: edited and decimated from high-rate (TBD s) to low-rate (TBD s) samples for science use (1 file per day, level-1 format) Spacecraft Mass Housekeeping data [GA-OG-1B-MASDAT, GB-OG-1B-MASDAT, GRACE MASDAT]: Level 1B Data as a function of time GPS navigation solution data [GA-OG-1B-NAVSOL, GB-OG-1B-NAVSOL, GRACE NAVSOL]: edited and decimated from instrument high-rate (60 s) to low-rate (30 s) samples for science use (1 file per day, level-1 format) OBDH time mapping to GPS time Housekeeping data [GA-OG-1B-OBDHTM, GB-OG-1B-OBDHTM, GRACE OBDHTM]: On-board data handling (OBDH) time mapping data (OBDH time to receiver time Star camera data [GA-OG-1B-SCAATT, GB-OG-1B-SCAATT, GRACE SCAATT]: Preprocessed and calibrated star camera quaternion data edited and decimated from instrument high-rate (1 s) to low-rate (5 s) samples for science use (1 file per day, level-1 format) Thruster activation Housekeeping data [GA-OG-1B-THRDAT, GB-OG-1B-THRDAT, GRACE THRDAT]: GN2 thruster data used for attitude (10 mN) and orbit (40 mN) control GN2 tank temperature and pressure Housekeeping data [GA-OG-1B-TNKDAT, GB-OG-1B-TNKDAT, GRACE TNKDAT]: GN2 tank temperature and pressure data Oscillator frequency data [GA-OG-1B-USODAT, GB-OG-1B-USODAT, GRACE USODAT]: derived from POD product GRACE-A and GRACE-B Combined Level-1B Data Product Preprocessed and calibrated k-band ranging data [GA-OG-1B-KBRDAT, GB-OG-1B-KBRDAT, GRACE KBRDAT]: range, range-rate and range-acceleration data edited and decimated from instrument high-rate (0.1 s) to low-rate (5 s) samples for science use (1 file per day, level-1 format) Atmosphere and Ocean De-aliasing Product [GA-OG-1B-ATMOCN, GB-OG-1B-ATMOCN, GRACE ATMOCN]: GRACE Atmosphere and Ocean De-aliasing Product. GRACE Level-2 Data Product: GAC [GA-OG-_2-GAC, GB-OG-_2-GAC, GRACE GAC]: Combination of non-tidal atmosphere and ocean spherical harmonic coefficients provided as average over certain time span (same as corresponding GSM product) based on level-1 AOD1B product (1file per time span, level-2 format) GCM [GA-OG-_2-GCM, GB-OG-_2-GCM, GRACE GCM]: Spherical harmonic coefficients and standard deviations of the long-term static gravity field estimated by combination of GRACE satellite instrument data and other information for a dedicated time span (multiple years) and spatial resolution (1 file per time span, level-2 format) GAB [GA-OG-_2-GAB, GB-OG-_2-GAB, GRACE GAB]: Non-tidal ocean spherical harmonic coefficients provided as average over certain time span (same as corresponding GSM product) based on level-1 AOD1B product (1file per time span, level-2 format) GAD [GA-OG-_2-GAD, GB-OG-_2-GAD, GRACE GAD]: bottom pressure product - combination of surface pressure and ocean (over the oceans, and zero over land). Spherical harmonic coefficients provided as average over certain time span (same as corresponding GSM product) based on level-1 AOD1B product (1file per time span, level-2 format) GSM [GA-OG-_2-GSM, GB-OG-_2-GSM, GRACE GSM]: Spherical harmonic coefficients and standard deviations of the static gravity field estimated from GRACE satellite instrument data only for a dedicated time span (e.g. weekly, monthly, multiple years) and spatial resolution (1 file per time span, level-2 format).
News - Data Release news
GRACE magnetometer data now available to support Swarm Sciences
We are pleased to announce the new release of magnetic field data recorded by Fluxgate magnetometers operating onboard the two GRACE satellites.
