This collection contains Sentinel-3 Level-2 Land products derived from the SAR Radar Altimeter (SRAL) and Microwave Radiometer (MWR) instruments. The altimetry products consist of surface topography measurements of the land surface. The Sentinel-3 mission, jointly operated by ESA and EUMETSAT, is designed as a constellation of two identical polar orbiting satellites, separated by 180°, for the provision of long-term operational marine and land monitoring services.
Sensor: SRAL (SAR Radar Altimeter), MWR (Microwave Radiometer)
Revisit time: <2 days at the equator
Launch dates: 16 February 2016 (Sentinel-3A), 25 April 2018 (Sentinel-3B)
Archiving start date: 29 February 2016
Mission Status: ongoing
Terms and conditions for the use of Sentinel data
Sentinel-3 Mission Overview
Sentinel-3 SRAL/MWR - Level 2 Products Overview and Processing Levels
Resolutions of Sentinel-3 Altimetry data:
File format of measurement data: netCDF
Suggested software: Broadview Radar Altimetry Toolbox (BRAT)
Sentinel-3 Altimetry coverage:
SRTM X-SAR - Color-Coded Elevation Mosaic - Global
The SRTM X-SAR Elevation Mosaic is an aggregation of DLR's SRTM X-SAR DTED files.
The DTED Level-2 files have been generated from Synthetic Aperture Radar (SAR) data acquired by the German-Italian X-band interferometric SAR system during the Shuttle Radar Topography Mission (SRTM) between February 11 and 22, 2000. The X-band system was flown and operated onboard the Space Shuttle Endeavor, along with a NASA C-Band SAR system. The SRTM project page at DLR provides additional information on the SRTM X-band mission (http://www.dlr.de/eoc/Portaldata/60/Resources/dokumente/7_sat_miss/SRTM-...). Further details on the mission in general, the technology, accuracies, and applications are available in http://www2.jpl.nasa.gov/srtm/SRTM_paper.pdf .
The original DTED files have been grouped and mosaicked into 30 x 30 degree tiles. Six out of the total of 48 tiles were empty since they do not contain any DTED files. The resulting 42 tiles are stored as uncompressed GeoTIFF files. The files have been supplemented with nine cubic convolution resampled overviews for fast web delivery.
The SRTM X-SAR Error Mosaic is based on the height error map (HEM, see SRTM PDF http://www.dlr.de/eoc/Portaldata/60/Resources/dokumente/7_sat_miss/SRTM-...) and provides a local measure of the achieved accuracy. It is statistically determined from a neighborhood of image cells mainly considering the phase and baseline stability. Thus it describes the precision relative to the surrounding. The determination of the absolute accuracy requires the consideration of reference measures.