{ "extent": { "spatial": {"bbox": [[ -180, -90, 180, 90 ]]}, "temporal": {"interval": [[ "2025-10-01T00:00:00Z", null ]]} }, "stac_version": "1.1.0", "renders": { "hhhh": { "assets": ["frequencyA-HHHH"], "rescale": [[ 0, 0.5 ]], "tilematrixsets": {"EPSG:3857": [ 8, 14 ]}, "colormap_name": "gray", "aggregation": { "name": "datetime_frequency", "params": {"datetime_frequency_interval": "day"} }, "title": "HHHH backscatter" }, "hhhh-hvhv": { "assets": [ "frequencyA-HHHH", "frequencyA-HVHV" ], "expression": "sqrt(b1);sqrt(b2);sqrt(b1)", "rescale": [ [ 0.14, 0.52 ], [ 0.05, 0.26 ], [ 0.14, 0.52 ] ], "tilematrixsets": {"EPSG:3857": [ 8, 14 ]}, "aggregation": { "name": "datetime_frequency", "params": {"datetime_frequency_interval": "day"} }, "title": "HHHH-HVHV false colour", "asset_as_band": true }, "hvhv": { "assets": ["frequencyA-HVHV"], "rescale": [[ 0, 0.15 ]], "tilematrixsets": {"EPSG:3857": [ 8, 14 ]}, "colormap_name": "gray", "aggregation": { "name": "datetime_frequency", "params": {"datetime_frequency_interval": "day"} }, "title": "HVHV backscatter" } }, "sci:doi": "10.5067/NIL2GCOV-B1", "keywords": [ "nisar", "jpl", "nasa", "isro", "sar", "l-band", "synthetic aperture radar", "geocoded covariance", "gcov", "backscatter", "land surface", "earth observation" ], "description": "The NISAR Beta Geocoded Polarimetric Covariance (GCOV) product contains radar covariance matrix elements derived from the NISAR L-band (and S-band) Synthetic Aperture Radar measurements. 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