Italy
Largo Galileo Galilei 1
ESA/ESRIN
Elevation
This dataset is a Fundamental Data Record (FDR) resulting from the _$$ESA FDR4ALT project$$ https://www.fdr4alt.org/ .
The Fundamental Data Record for Altimetry V1 products contain Level 0 and Level 1 altimeter-related parameters including calibrated radar waveforms and supplementary instrumental parameters describing the altimeter operating status and configuration through the satellite lifetime.
The data record consists of data for the ERS-1, ERS-2 and Envisat missions for the period ranging from 1991 to 2012, and bases on the Level 1 data obtained from previous ERS REAPER and ENVISAT V3.0 reprocessing efforts incorporating new algorithms, flags, and corrections to enhance the accuracy and reliability of the data.
For many aspects, the Altimetry FDR product has improved compared to the existing individual mission datasets:
New neural-network waveform classification, surface type classification, distance to shoreline and surface flag based on GSHHG
Instrumental calibration information directly available in the product
Improved Orbit solutions
Correction of REAPER drawbacks (i.e., time jumps and negative waveforms)
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.
Fundamental Data Records for Altimetry [ALT_FDR___]
EO Sign In Authentication
Open data
EO Sign In Authentication (Open) 1. Go to the _$$Dissemination Service$$ 2. Find the product you want using the search options 3. Register or log in to EO Sign In 4. Download (via HTTPS or FTPS)
The _$$dissemination service$$ https://hm-lbr-ds.eo.esa.int/oads/access/collection provides data generated within the ESA FDR4ALT project. The data is collection based and allows data browsing and download via treeview, filename or advanced catalogue search. Data download is available via HTTPS, including bulk download functionality. ESA internal users can use their ESAAD account to access the HTTPS Dissemination Service. Access to ftps://hm-lbr-ds.eo.esa.int is available via common FTP clients using “implicit FTP over TLS” and your own EO Sign In credentials. For internal ESA users the ESAAD account cannot be used for FTP access. New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ . Should you need support to access the data, please contact _$$EOHelp$$ .
World Wide
European Space Agency, 2023, FDR4ALT Fundamental Data Records for Altimetry. Version 1.0.
EARTH SCIENCE>ATMOSPHERE
EARTH SCIENCE>OCEANS
EARTH SCIENCE>OCEANS>BATHYMETRY/SEAFLOOR TOPOGRAPHY
EARTH SCIENCE>OCEANS>MARINE GEOPHYSICS
EARTH SCIENCE>OCEANS>OCEAN CIRCULATION
EARTH SCIENCE>OCEANS>OCEAN WAVES
EARTH SCIENCE>OCEANS>SEA SURFACE TOPOGRAPHY
EARTH SCIENCE>CRYOSPHERE
EARTH SCIENCE>CRYOSPHERE>SNOW/ICE
ENVISAT
RA
MWR
Atmosphere
Oceans
Bathymetry and Seafloor Topography
Marine Geophysics
Ocean Circulation
Ocean Waves
Sea Surface Topography
Cryosphere
Snow and Ice
Sun-synchronous
Radar Altimeters
Imaging Spectrometers/Radiometers
Envisat
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions.

Italy
This data set is conformant with the INSPIRE Implementing Rules for the interoperability of spatial data sets and services
Largo Galileo Galilei 1
ESA/ESRIN
Imagery Base Maps Earth Cover
Thematic collection: Bulk processed ERS-1/2 SAR IMP and Envisat ASAR IMP/APP Precision Level 1 products covering the Iceland mountains.
ERS SAR & Envisat ASAR Iceland mountains - L1 (IM/AP)
No info available.
European Space Agency, 2025, ERS SAR & Envisat ASAR Iceland mountains - L1 (IM), Version 1.0.
EARTH SCIENCE>AGRICULTURE
EARTH SCIENCE>BIOSPHERE
EARTH SCIENCE>OCEANS>MARINE ENVIRONMENT MONITORING>MARINE OBSTRUCTIONS
EARTH SCIENCE>CRYOSPHERE
EARTH SCIENCE>HUMAN DIMENSIONS
EARTH SCIENCE>LAND SURFACE
EARTH SCIENCE>HUMAN DIMENSIONS>NATURAL HAZARDS
EARTH SCIENCE>OCEANS
EARTH SCIENCE>CRYOSPHERE>SEA ICE
EARTH SCIENCE>AGRICULTURE>SOILS
EARTH SCIENCE>TERRESTRIAL HYDROSPHERE
EARTH SCIENCE>LAND SURFACE>TOPOGRAPHY
EARTH SCIENCE>BIOSPHERE>VEGETATION
ENVISAT
AMI
ASAR
Orthoimagery
Agriculture
Biosphere
Coastal Processes
Cryosphere
Human Dimensions
Land Surface
Natural Hazards and Disaster Risk
Oceans
Sea Ice
Soils
Terrestrial Hydrosphere
Topography
Vegetation
Sun-synchronous
ERS-1, ERS-2: SAR_IMP_1P
Envisat: ASA_IMP_1P, ASA_APP_1P
Envisat: 800 km
ERS-1, ERS-2: 5 km
Envisat 5 – 1150 km
Imaging Radars
Envisat
AMI/SAR
EO Sign In Authentication
Open data
World Wide

Italy
This data set is conformant with the INSPIRE Implementing Rules for the interoperability of spatial data sets and services
Largo Galileo Galilei 1
ESA/ESRIN
Imagery Base Maps Earth Cover
The SAR SLC product is a single look complex acquired in Image Mode. It is a digital image, with slant range and phase preserved, generated from raw SAR data using up-to-date auxiliary parameters. The products are intended for use in SAR quality assessment, calibration and interferometric applications. A minimum number of corrections and interpolations are performed on the data. Absolute calibration parameters (when available) are provided in the product annotation. Product characteristics: - Pixel size: 8 m (range - across track) x 4 m (azimuth - along track – varying slightly depending on acquisition Pulse Repetition Frequency) - Scene area: 100 km (range) x at least 102.5 km (azimuth) - Scene size: 5000 samples (range) x at least 30000 lines (azimuth) - Pixel depth: 32 bits signed integer (16 bits I, 16 bits Q) - Total product volume: 575 MB - Projection: Slant range - Number of looks: 1
ERS-1/2 SAR IM Single Look Complex L1 [SAR_IMS_1P]
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
conditions to access and use unknown
No info available.
EARTH SCIENCE>LAND SURFACE
EARTH SCIENCE>LAND SURFACE>TOPOGRAPHY
EARTH SCIENCE>BIOSPHERE>VEGETATION
EARTH SCIENCE>CRYOSPHERE
EARTH SCIENCE>CRYOSPHERE>SNOW/ICE
EARTH SCIENCE>CRYOSPHERE>SEA ICE
AMI
Orthoimagery
Land Surface
Topography
Vegetation
Cryosphere
Snow and Ice
Sea Ice
Sun-synchronous
5 km
Imaging Radars
AMI/SAR
EO Sign In Authentication
Open Data
EO Sign In Authentication (Open) 1. Go to the _$$Dissemination Service$$ https://esar-ds.eo.esa.int/oads/access/collection/SAR_IMS_1P 2. Find the product you want via a map using the catalogue search 3. Register or log in to EO Sign In 4. Download.
The ESA (A)SAR On-the-fly (OTF) data processing and dissemination service allows end-users to gain direct access to the (A)SAR archive from the ERS-1, ERS-2 and Envisat Missions. The data is collection based and allows data browse and download through the treeview as well as via _$$geographical catalogue search$$ http://esar-ds.eo.esa.int/socat/SAR_IMS_1P based on area of interest and metadata. _$$Interferometric search$$ http://esar-ds.eo.esa.int/socat/SAR-ASA_IMS_1P/pair_search option is available for relevant collections. Data download is available via HTTPS, including bulk download functionality. ERS products can also be discovered through_$$ESA's EO Catalogue (EO CAT)$$ , which allows users to discover and download products among the available datasets from ESA and Third Party Missions and instruments, using various criteria (spatial, temporal, specific). For information on the (A)SAR On-The-Fly service please refer to the _$$OTF User Manual$$ . New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ . For internal ESA users the ESAAD account cannot be used. Should you need support to access the data, please contact _$$EOHelp$$ .
World Wide

Oceans
This is the Ocean and Coastal Topography Thematic Data Product (TDP) V1 resulting from the _$$ESA FDR4ALT project$$ https://www.fdr4alt.org/ 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.
Ocean and Coastal Topography Thematic Data Product [ALT_TDP_OC]
EO Sign In Authentication (Open)
Open Data
EO Sign In Authentication (Open) 1. Go to the _$$Dissemination Service$$ 2. Find the product you want using the search options 3. Register or log in to EO Sign In 4. Download (via HTTPS or FTPS)
The _$$dissemination service$$ https://hm-lbr-ds.eo.esa.int/oads/access/collection provides data generated within the ESA FDR4ALT project. The data is collection based and allows data browsing and download via treeview, filename or advanced catalogue search. Data download is available via HTTPS, including bulk download functionality. ESA internal users can use their ESAAD account to access the HTTPS Dissemination Service. Access to ftps://hm-lbr-ds.eo.esa.int is available via common FTP clients using “implicit FTP over TLS” and your own EO Sign In credentials. For internal ESA users the ESAAD account cannot be used for FTP access. New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ Should you need support to access the data, please contact _$$EOHelp$$
European Space Agency, 2023, FDR4ALT Ocean and Coastal Topography Thematic Data Product. Version 1.0.
EARTH SCIENCE>OCEANS
ENVISAT
RA
MWR
Radar Altimeters
Imaging Spectrometers/Radiometers
Envisat
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions.

This data set is conformant with the INSPIRE Implementing Rules for the interoperability of spatial data sets and services
Imagery Base Maps Earth Cover
Thematic collection: ESAR OTF bulk processed ERS-1/2 SAR Image Mode Single Look Complex (IMS) Level 1 products covering the Svalbard area generated for ESA CCI Glacier project.
ERS SAR Svalbard coverage - L1 (IM)
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions.
No info available.
European Space Agency, 2025, ERS SAR Svalbard coverage - L1 (IM), Version 1.0.
EARTH SCIENCE>AGRICULTURE
EARTH SCIENCE>BIOSPHERE
EARTH SCIENCE>OCEANS>MARINE ENVIRONMENT MONITORING>MARINE OBSTRUCTIONS
EARTH SCIENCE>HUMAN DIMENSIONS
EARTH SCIENCE>LAND SURFACE
EARTH SCIENCE>HUMAN DIMENSIONS>NATURAL HAZARDS
EARTH SCIENCE>CRYOSPHERE>SEA ICE
EARTH SCIENCE>CRYOSPHERE>SNOW/ICE
EARTH SCIENCE>AGRICULTURE>SOILS
EARTH SCIENCE>TERRESTRIAL HYDROSPHERE
EARTH SCIENCE>LAND SURFACE>TOPOGRAPHY
EARTH SCIENCE>BIOSPHERE>VEGETATION
AMI
Orthoimagery
Agriculture
Biosphere
Coastal Processes
Human Dimensions
Land Surface
Natural Hazards and Disaster Risk
Sea Ice
Snow and Ice
Soils
Terrestrial Hydrosphere
Topography
Vegetation
ERS-1, ERS-2: SAR_IMS_1P
ERS-1, ERS-2: 5 km
Imaging Radars
AMI/SAR
Open data

Thematic collection: Bulk processed ERS-1/2 SAR IMP and Envisat ASAR IMP/APP Precision Level 1 products covering the Scandinavia mountains
ERS SAR & Envisat ASAR Scandinavia mountains - L1 (IM/AP)
European Space Agency, 2025, ERS SAR & Envisat ASAR Scandinavia mountains - L1 (IM), Version 1.0.
EARTH SCIENCE>AGRICULTURE
EARTH SCIENCE>BIOSPHERE
EARTH SCIENCE>OCEANS>MARINE ENVIRONMENT MONITORING>MARINE OBSTRUCTIONS
EARTH SCIENCE>HUMAN DIMENSIONS>NATURAL HAZARDS
EARTH SCIENCE>TERRESTRIAL HYDROSPHERE
EARTH SCIENCE>AGRICULTURE>SOILS
ASAR
Agriculture
Biosphere
Coastal Processes
Natural Hazards and Disaster Risk
Terrestrial Hydrosphere
Soils
ERS-1, ERS-2: SAR_IMP_1P
Envisat: ASA_IMP_1P, ASA_APP_1P
Envisat: 800 km
ERS-1, ERS-2: 5 km
Envisat 5 – 1150 km

This is the Land Ice Thematic Data Product (TDP) V1 resulting from the _$$ESA FDR4ALT project$$ https://www.fdr4alt.org/ 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 (_$$ALT FDR$$ https://earth.esa.int/eogateway/catalog/fdr-for-altimetry).
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.
Land Ice Thematic Data Product [ALT_TDP_LI]
EO Sign In Authentication (Open)
EO Sign In Authentication (Open) 1.Go to the _$$Dissemination Service$$ 2.Find the product you want using the search options 3.Register or log in to EO Sign In 4.Download (via HTTPS or FTPS)
The _$$dissemination service$$ https://hm-lbr-ds.eo.esa.int/oads/access/collection provides data generated within the ESA FDR4ALT project. The data is collection based and allows data browsing and download via treeview, filename or advanced catalogue search. Data download is available via HTTPS, including bulk download functionality. ESA internal users can use their ESAAD account to access the HTTPS Dissemination Service. Access to ftps://hm-lbr-ds.eo.esa.int is available via common FTP clients using “implicit FTP over TLS” and your own EO Sign In credentials. For internal ESA users the ESAAD account cannot be used for FTP access. New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ Should you need support to access the data, please contact _$$EOHelp$$
European Space Agency, 2023, FDR4ALT Land-Ice Thematic Data Product. Version 1.0.
RA
MWR
Radar Altimeters
Imaging Spectrometers/Radiometers

Geoscientific Information
This dataset is a Fundamental Data Record (FDR) resulting from the _$$ESA FDR4ALT project$$ https://www.fdr4alt.org/ .
The Fundamental Data Record for Radiometry V1 products contain intercalibrated Top of the Atmosphere brightness temperatures at 23.8 and 36.5 GHz. The collection covers data for the ERS-1, ERS-2 and Envisat missions, and is built upon a new processing of Level 0 data, incorporating numerous improvements in terms of algorithms, flagging procedures, and corrections.
Compared to existing datasets, the Radiometry FDR demonstrates notable improvements in several aspects:
New solutions for instrumental effects (ERS Reflector loss, Skyhorn, and Sidelobe corrections)
Native sampling rate of 7Hz with enhanced coverage
Fundamental Data Records for Radiometry [MWR_FDR___]
EO Sign In Authentication (Open)
EO Sign In Authentication (Open) 1. Go to the Dissemination Service 2. Find the product you want using the search options 3. Register or log in to EO Sign In 4. Download (via HTTPS or FTPS)
The _$$dissemination service$$ https://hm-lbr-ds.eo.esa.int/oads/access/collection provides data generated within the ESA FDR4ALT project. The data is collection based and allows data browsing and download via treeview, filename or advanced catalogue search. Data download is available via HTTPS, including bulk download functionality. ESA internal users can use their ESAAD account to access the HTTPS Dissemination Service. Access to ftps://hm-lbr-ds.eo.esa.int is available via common FTP clients using “implicit FTP over TLS” and your own EO Sign In credentials. For internal ESA users the ESAAD account cannot be used for FTP access. New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ . Should you need support to access the data, please contact _$$EOHelp$$ .
European Space Agency, 2023, FDR4ALT Fundamental Data Records for Radiometry. Version 1.0.
EARTH SCIENCE>ATMOSPHERE
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC WATER VAPOR
EARTH SCIENCE>AGRICULTURE>SOILS>SOIL MOISTURE/WATER CONTENT
Atmosphere
Atmospheric Water Vapour
Soil Moisture

Climatology Meteorology Atmosphere
The ASPS Level 2 products contain, for each node: the radar backscattering sigma nought for the three beams of the instrument, the four aliased wind solutions (Rank 1-4 wind vector) and the de-aliased wind vector flag, the sea-ice probability and sea-ice flag, the YAW quality flag.
The wind retrieval is performed with the CMOD5N geophysical model function derived by ECMWF to compute the neutral winds rather than 10 m winds.
ASPS L2.0 High resolution products are provided with a spatial resolution of 25x25 km and a grid spacing of 12.5 km.
ASPS L2.0 Nominal resolution products are provided with a spatial resolution of 50x50 km and a grid spacing of 25 km.
One product covers one orbit from ascending node crossing.
Please consult the _$$Product Quality Readme$$ file before using the ERS ASPS data.
ERS-1/2 SCATTEROMETER Ocean Wind field and Sea Ice probability [ASPS20.H/ASPS20.N]
Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions
European Space Agency, 2019, ERS-1/2 SCATTEROMETER Ocean Wind field and Sea Ice probability [ASPS20.H/ASPS20.N], Version ASPS v10.04.
EARTH SCIENCE>ATMOSPHERE
EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC WINDS
ERS WIND SCATTEROMETER
Atmosphere
Atmospheric Winds
5 km
Scatterometers
AMI/Scatterometer
Fast Registration with immediate access
Open Data
Fast Registration with Immediate Access (Open) 1. Go to the _$$ESA User Services Portal$$ 2. Register or log in to EO Sign In 3. Fill in and submit the form for accessing the data 4. You will receive an email with your user name 5. A second email will follow with your password to download the data from the _$$erswsc-ftp-ds.eo.esa.int$$ ftp://erswsc-ftp-ds.eo.esa.int/ server via an FTP client (see Read More for connection details) or, alternatively, from command line using L-FTP
The data can be downloaded via an FTP client (e.g., FileZilla or WinSCP) using the options "explicit FTP over TLS if available" or "Require explicit FTP over TLS". See ERS-WS _$$Product availability$$ table For further information about the EO Sign In Service you can visit _$$TellUs$$ Should you need support to access the data, please contact _$$EOHelp$$

The JSA_SLC_1P product is comparable to the ESA SLC/IMS images generated for Envisat ASAR and ERS SAR instruments. It is a slant-range projected complex image in zero-Doppler SAR coordinates. The data is sampled in natural units of time in range and along track, with the range pixel spacing corresponding to the reciprocal of the platform ADC rate and the along track spacing to the reciprocal of the PRF. Data is processed to an unweighted Doppler bandwidth of 1000Hz, without sidelobe reduction. The product is suitable for interferometric, calibration and quality analysis applications. Data acquired by ESA ground stations
JERS-1 SAR Level 1 Single Look Complex Image
Utilisation of this data is subject to the Terms and Conditions for ESA's Third Party Missions scheme
conditions to access and use unknown
European Space Agency, 2018, JERS-1 SAR Level 1 Single Look Complex Image. Version 1.0.
EARTH SCIENCE>OCEANS>OCEAN WAVES
EARTH SCIENCE>CRYOSPHERE>GLACIERS/ICE SHEETS
SAR
Ocean Waves
Glaciers and Ice Sheets
High Resolution - HR (5 - 20 m)
75 km
EO Sign In Authentication (Open) 1. Go to the _$$Dissemination Service$$ https://tpm-ds.eo.esa.int/oads/access/collection/JERS1-SLC 2. Find the product you want via a map 3. Register or log in to EO Sign In 4. Download
The products are available for download via a dedicated _$$dissemination service$$ https://tpm-ds.eo.esa.int/socat/JERS1-SLC and catalogue the data is collection based and allows data browse and download through the treeview as well as via geographical search using an interactive map. JERS-1 products can also be discovered through _$$ESA's EO Catalogue (EO CAT)$$ which allows users to discover and download products among the available datasets from ESA and Third Party Missions and instruments, using various criteria (spatial, temporal, specific). New users can register an account on EO Sign In. For further information about the EO Sign In Service you can visit _$$TellUs$$ ESA internal users can use their ESAAD account. Should you need support to access the data, please contact _$$EOHelp$$