Correct metadata for Sentinel 1 Backscatter collection

Open-EO / openeo-geotrellis-kubernetes

Contains scripts to run openeo geotrellis backend on a Kubernetes cluster on DIAS.

Apache License 2.0

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Correct metadata for Sentinel 1 Backscatter collection #7

Open soxofaan opened 3 years ago

soxofaan commented 3 years ago

https://github.com/Open-EO/openeo-geotrellis-kubernetes/blob/3174175b03705844005e870a4092626abbfe9475/docker/creo_layercatalog.json#L201-L267

@jdries I added this SENTINEL1_GRD_BACKSCATTER_SIGMA0 collection quickly without much attention for correct metadata. Is the collection id ok? What should the title and description be? Where can I find correct spatial and temporal extents?

jdries commented 3 years ago

GEE can provide some inspiration. They also seem to apply a backscatter conversion by default.

https://earthengine.openeo.org/v1.0/collections/COPERNICUS/S1_GRD

It is also possible to take the instrument mode into consideration: https://dragon3.esa.int/web/sentinel/user-guides/sentinel-1-sar/acquisition-modes/interferometric-wide-swath Not sure if we want to filter on IW mode by default, or if this should be done by the user.

soxofaan commented 3 years ago

already renamed it to SENTINEL1_GRD as suggested

reading the GEE description also brought this issue up:

Terrain correction using SRTM 30 or ASTER DEM for areas greater than 60 degrees latitude, where SRTM is not available.

we only do SRTM at te moment (there is also mapzen with larger coverage, but this gives poor output quality and worse performance)