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  • News - Infographics

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    Showcasing success stories from ESA's Heritage Missions

    Find out how ESA's Heritage Space Programme data continue to help, even decades after they finished operations, in our latest infographic.

  • Document - Newsletter

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    Earth Online Newsletter - 08 March 2024

    This issue of the Earth Online Newsletter covers a selection of the latest news and events from ESA.

  • News - Data Release news

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    FDR4ALT - ESA unveils new cutting-edge ERS/Envisat Altimeter and Microwave Radiometer Datasets

    The European Space Agency (ESA) has developed a comprehensive suite of innovative Earth system data records as part of the Fundamental Data Records for Altimetry project - FDR4ALT.

  • Data - EO Sign In Authentication (Open)

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    Sea Ice Thematic Data Product [ALT_TDP_SI]

    This is the Sea Ice Thematic Data Product (TDP) V1 resulting from the ESA FDR4ALT project and containing the sea ice related geophysical parameters, along with associated uncertainties: snow depth, radar and sea-ice freeboard, sea ice thickness and concentration. The collection covers data for the ERS-1, ERS-2 and Envisat missions, and bases on Level 1 data coming from previous reprocessing (ERS REAPER and the Envisat V3.0) but taking into account the improvements made at Level 0/Level 1 in the frame of FDR4ALT (ALT FDR). The Sea Ice TDP provides data from the northern or southern hemisphere in two files corresponding to the Arctic and Antarctic regions respectively for the winter periods only, i.e., October to June for the Arctic, and May to November for the Antarctic. For many aspects, the Sea Ice TDP is very innovative: First time series of sea-ice thickness estimates for ERS Homogeneous calibration, allowing the first Arctic radar freeboard time series from ERS-1 (1991) to CryoSat-2 (2021) Uncertainties estimated along-track with a bottom-up approach based on dominant sources ERS pulse blurring error corrected using literature procedure [Peacock, 2004] The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the FDR4ALT Product User Guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

  • Data - EO Sign In Authentication (Open)

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    Land Ice Thematic Data Product [ALT_TDP_LI]

    This is the Land Ice Thematic Data Product (TDP) V1 resulting from the ESA FDR4ALT project and containing estimates of ice sheet surface elevation and associated uncertainties. The collection covers data for three different missions: ERS-1, ERS-2 and Envisat, and based on Level 1 data coming from previous reprocessing (ERS REAPER and the Envisat V3.0) but taking into account the improvements made at Level 0/Level 1 in the frame of FDR4ALT (ALT FDR). The Land Ice TDP focuses specifically on the ice sheets of Greenland and Antarctica, providing these data in different files. For many aspects, the Land Ice Level 2 and Level 2+ processing is very innovative: Improved relocation approach correcting for topographic effects within the beam footprint to identify the Point of Closest Approach Homogeneous timeseries of surface elevation measurements at regular along-track reference nodes. The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the FDR4ALT Product User Guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

  • Data - EO Sign In Authentication (Open)

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    Ocean and Coastal Topography Thematic Data Product [ALT_TDP_OC]

    This is the Ocean and Coastal Topography Thematic Data Product (TDP) V1 resulting from the ESA FDR4ALT project and containing improved sea surface height anomaly data records both at 1 Hz and 20 Hz resolution to address climate and/or coastal areas studies. The collection covers data for the ERS-1, ERS-2 and Envisat missions. Note that a dedicated processing to coastal zones has been applied for coastal distances below 200 km. Compared to existing datasets, the Ocean and Coastal Topography TDP demonstrates notable improvements in several aspects: Up-to-date orbit and geophysical corrections applied Adaptive retracker for Envisat The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the FDR4ALT Product User Guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

  • Data - EO Sign In Authentication (Open)

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    Ocean Waves Thematic Data Product [ALT_TDP_WA]

    This is the Ocean Waves Thematic Data Product (TDP) V1 resulting from the ESA FDR4ALT project and containing Significant Wave Height estimates for the ERS-1, ERS-2 and Envisat missions. Compared to existing datasets, the Ocean Waves TDP demonstrates notable improvements in several aspects: Great improvements for Envisat due to noise reduction from Adaptive retracker and High-Frequency Adjustment (HFA) All variables are given at 5 Hz The FDR4ALT products are available in NetCDF format. Free standard tools for reading NetCDF data can be used. Information for expert altimetry users is also available in a dedicated NetCDF group within the products. Please consult the FDR4ALT Product User Guide before using the data. The FDR4ALT datasets represent the new reference data for the ERS/Envisat altimetry missions, superseding any previous mission data. Users are strongly encouraged to make use of these datasets for optimal results.

  • News - Operational News

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    Temporary interruption to Envisat AATSR dissemination service

    A planned downtime will affect the access to the ftp dissemination server for the Envisat AATSR data during the period 13-15 February 2024.

  • Document - Newsletter

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    Earth Online Newsletter - 09 February 2024

    This issue of the Earth Online Newsletter covers a selection of the latest news and events from ESA.

  • News - Success Stories

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    Trailblazing ERS-2 mission enables climate change applications

    As ESA’s ERS-2 satellite approaches Earth’s atmosphere for reentry, it’s time to reflect on the mission’s great achievements in powering climate-related applications.

  • News - Thematic area articles

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    Space data support Earth’s ecosystems

    ESA’s Earth observation (EO) missions are making a critical contribution to monitoring transformations in our planet’s ecosystems, helping track changes in the vegetation, soil, and ocean that affect these systems.

  • News - Infographics

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    Learn more about Envisat MERIS Full Resolution Level-1 data

    Learn more about the Envisat MERIS Level 1 products in our latest infographic.

  • News - Maintenance News

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    ESA Data Dissemination Maintenance - 18 January 2024

    A planned software maintenance activity will affect ESA's GOCE data dissemination service on 18 January 2024.

  • News - Data Release news

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    Envisat MIPAS data now available on new ESA Dissemination Server

    The latest reprocessed Envisat MIPAS Level 1 and Level 2 datasets have now been migrated from simple FTP access to the new Online Dissemination service for ESA Heritage Missions (HM) Atmospheric data.

  • News - Infographics

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    Focusing on Envisat MERIS Full Resolution Level-2 data

    ESA's Envisat mission continued and expanded upon the legacy of its predecessors, the ERS (European Remote Sensing) satellites. Operating between 2002 and 2012, the satellite's 10 instruments acquired a decade of data for many applications.

  • News - Events and Proceedings

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    GLOC 2023: Democratising data access key to climate action

    The need for easy access to remote sensing data and making them more digestible to the local user community, were take home messages from the first Global Space Conference on Climate Change (GLOC), held in Oslo, Norway, last week.

  • News - Success Stories

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    ESA missions deliver new long-term perspective on sea ice decline

    A 29-year timeseries of polar sea ice thickness and volume that draws on altimetry data from a succession of ESA missions has been presented at the European Geoscience Union general assembly.

  • News - Events and Proceedings

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    Scientists to showcase value of Earth observation data at EGU

    Remote sensing scientists are getting ready to present innovative and exciting applications of satellite data at the European Geosciences Union general assembly which will take place from 24 to 28 April in Vienna, Austria.

  • News - Thematic area articles

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    Monitoring water on Earth's surface

    ESA's Earth observation satellites are playing a leading role in furthering our understanding of how Earth's terrestrial hydrosphere is being influenced by humankind.

  • News - General News

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    Pioneering science missions: Summarising ESA’s Earth Explorers

    Designed for research purposes, ESA's Earth Explorer missions are dedicated to monitoring parts of Earth’s system. Learn more about the Earth Explorers in this video.