{
  "schema": "arden.space-radar/context-image-provenance/v1",
  "file": "world-mosaic.png",
  "sha256": "d521fa4d0bbfb377a84e4b53025bda5cdcc8969f6be2da82828e484fd9295f8c",
  "derived_from_repo_asset": "opensar/demo/assets/basemap/world.png",
  "derived_from_repo_sidecar": "opensar/demo/assets/basemap/world.json",
  "source": "s3://sentinel-1-global-coherence-earthbigdata/data/mosaics/Global_fall_vv_AMP_100ppd.tif",
  "product": "Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter Data Set",
  "subset": "fall VV mean gamma-nought amplitude mosaic",
  "observation_period": "2019-12-01/2020-11-30",
  "developers": "Earth Big Data LLC and Gamma Remote Sensing AG, under contract for NASA Jet Propulsion Laboratory",
  "distributor": "NASA Alaska Satellite Facility Distributed Active Archive Center",
  "source_page": "https://asf.alaska.edu/datasets/daac/global-seasonal-sentinel-1-interferometric-coherence-and-backscatter-dataset/",
  "dataset_doi": "https://doi.org/10.5067/8W33RRS6S2RV",
  "data_citation": "Kellndorfer, J., O. Cartus, M. Lavalle, C. Magnard, P. Milillo, S. Oveisgharan, B. Osmanoglu, P. Rosen, and U. Wegmüller. 2022. Global seasonal Sentinel-1 interferometric coherence and backscatter data set. Subset used: fall VV mean gamma-nought amplitude global mosaic. Fairbanks, Alaska USA. NASA Alaska Satellite Facility Synthetic Aperture Radar Distributed Active Archive Center. https://doi.org/10.5067/8W33RRS6S2RV. Accessed 2026-08-09.",
  "accessed_on": "2026-08-09",
  "licence": "Creative Commons Attribution 4.0 International",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Contains modified Copernicus Sentinel data 2019-2020.",
  "processing": {
    "source_pixels": [5400, 2700],
    "source_spacing_degrees": 0.01,
    "display_db_window": [-22.27, -5.71],
    "display_gamma": 1.8,
    "frame": "plate carree, -180..180 / -90..90",
    "coverage": "58S to 81N; poles are nodata"
  },
  "claim_boundary": "The raster is measured orbital context. Space Radar nodes and geometry are illustrative; it is not a live track or passive-radar detection."
}