Imaging · collection · 2025
OPERA Radiometric Terrain Corrected SAR Backscatter from Sentinel-1 validated product (Version 1)
Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/snwg/opera_l2_rtc-s1_v1
The Observational Products for End-Users from Remote Sensing Analysis (OPERA) Radiometric Terrain Corrected (RTC) SAR Backscatter from Sentinel-1 (S1) validated product consists of radar backscatter normalized with respect to the topography.
Description
The product maps signals related to the physical properties of ground scattering objects, such as surface roughness and soil moisture and/or vegetation. The OPERA RTC-S1 product is derived from Copernicus Sentinel-1 Interferometric Wide (IW) Single Look Complex (SLC) data with a near global scope and temporal sampling coincident with the availability of S1 SLC data.
Each OPERA RTC-S1 product corresponds to a single S1 burst projected onto a pre-defined UTM/Polar stereographic map projection system map grid with a 30-meter spacing. The Copernicus global 30 m (GLO-30) Digital Elevation Model (DEM) is the reference DEM used to correct for the impacts of topography and to geocode the product. The OPERA RTC-S1 product is normalized to the backscatter coefficient gamma-naught, ɣ0, obtained from the original radar brightness beta-naught, β0, through radiometric terrain correction.
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The RTC-S1 product is distributed as cloud optimized GeoTIFFs with one GeoTIFF file per processed polarization. The RTC-S1 product metadata is provided in the Hierarchical Data Format version 5 (HDF5) format. Due to the S1 mission’s narrow orbital tube, radar-geometry layers such as incidence angle, local incidence angle, number of looks, and RTC Area Normalization Factor (ANF) vary slightly over time for each position on the ground, and therefore are considered static.
These static layers are provided separately from the OPERA RTC-S1 product, as they are produced only once or a limited number of times, to account for changes in the DEM, in the S1 orbit, or in the static-layers generation algorithm. The static layers are available in the associated OPERA Radiometric Terrain Corrected SAR Backscatter from Sentinel-1 Static Layers validated product (Version 1) dataset. The OPERA RTC-S1 product contains modified Copernicus Sentinel data (2014-2026).
The OPERA project is funded by NASA’s Satellite Needs Working Group (SNWG) which provides data products developed to meet the needs of stakeholders from US government agencies.
Links
Get the data
- PDF cumulus.asf.earthdatacloud.nasa.gov/PUBLIC/DATA/OPERA/ProductSpec_RTC-S1.pdf ↗
OPERA Product Specification for OPERA Radiometric Terrain Corrected SAR Backscatter from Sentinel-1 products
documentation · download · from NASA CMR, data nasa gov
- PDF cumulus.asf.earthdatacloud.nasa.gov/PUBLIC/DATA/OPERA/D-107393_OPERA_RTC-S1_ATBD_Initial_2024-06-2… ↗
OPERA Algorithm Theoretical Basis Document for Radiometric Terrain-Corrected SAR Backscatter from Sentinel-1 Product
documentation · download · from NASA CMR, data nasa gov
- Original Metadata cmr.earthdata.nasa.gov/search/concepts/C2777436413-ASF.iso19115 ↗
download · from data nasa gov
- ASF data search and download interface search.asf.alaska.edu ↗
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C2777436413-ASF ↗
Search and download data granules using NASA Earthdata Search interface.
download · from NASA CMR
- Resource jpl.nasa.gov/go/opera ↗
download · project · from data nasa gov, NASA CMR
- Resource earthdata.nasa.gov/data/projects/opera ↗
download · project · from data nasa gov, NASA CMR
- Resource go.nasa.gov/476eg1H ↗
OPERA Radiometric Terrain Corrected SAR Backscatter (False Color) in Worldview
download · preview image · from data nasa gov, NASA CMR
- PNG datapool.asf.alaska.edu/BROWSE/OPERA-S1/OPERA_L2_RTC-S1_T124-264306-IW2_20231027T04312… ↗
download · preview image · from data nasa gov, NASA CMR
Where it is published
- NASA Data Portal dataset page data.nasa.gov/dataset/opera-radiometric-terrain-corrected-sar-backscatter-fr… ↗
landing page · from data nasa gov
- DOI doi.org/10.5067/snwg/opera_l2_rtc-s1_v1 ↗
DOI / persistent id · from NASA CMR
Catalogue records · 3
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2777436413-ASF.umm_json ↗
metadata API · from NASA CMR
- CKAN API data.nasa.gov/api/3/action/package_show?id=aaf0dfef-4985-405e-901a-b40422fec… ↗
metadata API · from data nasa gov
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2777436413-ASF.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- C-Band Synthetic Aperture Radar · Coastal Processes · Geomorphic Landforms/Processes · Geomorphic Landforms/Processes · Glaciers Ice Sheets · SENTINEL-1A · SENTINEL-1B · Sentinel-1C · Tectonics
- From keywords
- Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Satellite remote sensing 65%
Provenance · 2 source records, 24 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2777436413-ASF | 7 d ago | JSON v1 |
| NASA Data Portal | aaf0dfef-4985-405e-901a-b40422fec4db | 4 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[field].local:field:physics | mapping · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| concepts[instrument].gcmd_instrument:c-sar | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/cryosphere/glaciers-ice-sheets | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/land-surface/geomorphic-landforms-processes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/oceans/coastal-processes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/geomorphic-landforms-processes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/solid-earth/tectonics | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[modality].local:modality:remote-sensing | enrichment · NASA CMR | keyword-concept-rules@1.0.0 | title+description (65%) |
| concepts[platform].gcmd_platform:sentinel-1a | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:sentinel-1b | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:sentinel-1c | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| publication_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| updated_date | source · data nasa gov | connector:data_nasa_gov@1.0.0 | |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |