dataset · Global
Sentinel-1 SAR GRD: C-band Synthetic Aperture Radar Ground Range Detected, log scaling
The Sentinel-1 mission provides data from a dual-polarization C-band Synthetic Aperture Radar (SAR) instrument at 5.405GHz (C band). This collection includes the S1 Ground Range Detected (GRD) scenes, processed using the Sentinel-1 Toolbox to generate a calibrated, ortho-corrected product. The collection is updated daily. New assets are ingested within two days after they become available. This collection contains all of the GRD scenes. Each scene has one of 3 resolutions (10, 25 or 40 meters),
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Licence: proprietary
Evidence quality: 40.6
Listed in gee public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- C-band SAR Ground Range Detected (GRD) scenes, calibrated and ortho-corrected, in dB · Polarisations VV, HH, VV+VH, HH+HV · Approximate incidence angle band (deg)
- Coverage llm-inferred
- Global · 2014-10-03 to 2025-10-17
- Resolution docs-verified
- 10, 25 or 40 m, depending on scene
- Update frequency docs-verified
- Daily updates; new assets ingested within two days of becoming available
- Formats docs-verified
- Google Earth Engine ImageCollection
- Access docs-verified
- Google Earth Engine account (registration required); free for research, education and nonprofit use. Data use is subject to the Copernicus Sentinel Data Terms and Conditions (ENTRY licence: proprietary).
Useful for
- Use cases llm-inferred
- Pre/post-event flood extent mapping from multi-temporal SAR backscatter for FRA evidence · Surface wetness and inundation screening for drainage or SuDS baseline studies · Multi-temporal backscatter change detection for land-cover or habitat change monitoring (BNG baseline support)
- Audience llm-inferred
- GIS analysts · hydrologists · flood consultants · ecologists
Limitations
- Constraints llm-inferred
- Date range conflicts within the docs: page summary says available to 2025-10-17, availability block says to 2026-10-16; verify current coverage before relying on it · Requires an Earth Engine account and is subject to Copernicus Sentinel terms; commercial licensing terms beyond the stated free-use categories are not given in the docs · Collection mixes polarisations, resolutions and instrument modes; mosaics need filtering to a homogeneous set of bands and parameters · Processed values are computed on the fly; the raw-power collection COPERNICUS/S1_GRD_FLOAT is updated faster · Revisit interval is 6 days, and new assets can lag by up to two days · Terrain correction uses SRTM 30 or ASTER DEM above 60 degrees latitude, where SRTM is unavailable · Angle band is an interpolated approximation, and band min/max values are estimates
Evidence
- ee.ImageCollection('COPERNICUS/S1_GRD')
- https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S1_GRD
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.