# Source: Sentinel 1 Level-1 Ground Range Detected (GRD)
# Type: cog
# Catalog: STACConnector
# Generated by: folia catalog import
# Generated at: 2026-02-08T00:48:46.754595+00:00
#
# Do not edit manually - will be overwritten on next import.

source:
  id: planetary-computer-sentinel-1-grd
  name: Sentinel 1 Level-1 Ground Range Detected (GRD)
  type: cog
  url: https://planetarycomputer.microsoft.com/api/stac/v1/collections/sentinel-1-grd
  description: 'The [Sentinel-1](https://sentinel.esa.int/web/sentinel/missions/sentinel-1)
    mission is a constellation of two polar-orbiting satellites, operating day and
    night performing C-band synthetic aperture radar imaging. The Level-1 Ground Range
    Detected (GRD) products in this Collection consist of focused SAR data that has
    been detected, multi-looked and projected to ground range using the Earth ellipsoid
    model WGS84. The ellipsoid projection of the GRD products is corrected using the
    terrain height specified in the product general annotation. The terrain height
    used varies in azimuth but is constant in range (but can be different for each
    IW/EW sub-swath).


    Ground range coordinates are the slant range coordinates projected onto the ellipsoid
    of the Earth. Pixel values represent detected amplitude. Phase information is
    lost. The resulting product has approximately square resolution pixels and square
    pixel spacing with reduced speckle at a cost of reduced spatial resolution.


    For the IW and EW GRD products, multi-looking is performed on each burst individually.
    All bursts in all sub-swaths are then seamlessly merged to form a single, contiguous,
    ground range, detected image per polarization.


    For more information see the [ESA documentation](https://sentinel.esa.int/web/sentinel/user-guides/sentinel-1-sar/product-types-processing-levels/level-1)


    ### Terrain Correction


    Users might want to geometrically or radiometrically terrain correct the Sentinel-1
    GRD data from this collection. The [Sentinel-1-RTC Collection](https://planetarycomputer.microsoft.com/dataset/sentinel-1-rtc)
    collection is a global radiometrically terrain corrected dataset derived from
    Sentinel-1 GRD. Additionally, users can terrain-correct on the fly using [any
    DEM available on the Planetary Computer](https://planetarycomputer.microsoft.com/catalog?tags=DEM).
    See [Customizable radiometric terrain correction](https://planetarycomputer.microsoft.com/docs/tutorials/customizable-rtc-sentinel1/)
    for more.'
  provider: ESA
  license: proprietary
  metadata:
    stac: true
    stac_api: true
    connector_id: planetary-computer
    tags:
    - ESA
    - Copernicus
    - Sentinel
    - C-Band
    - SAR
    - GRD
    dataset:
      tier: 1
      thematic_group: Satellite Imagery
      format: cog
      crs: EPSG:4326
      temporal:
        range: 2014-10-10/..
        type: snapshot
        default_range: latest
      quality:
        coverage: global
      layout:
        type: tiled
        spatial:
          scheme: mgrs
      stac_collection_id: sentinel-1-grd
      homepage: https://planetarycomputer.microsoft.com/api/stac/v1/collections/sentinel-1-grd