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OSGeo / gdal

GDAL is an open source MIT licensed translator library for raster and vector geospatial data formats.
https://gdal.org
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Feature request: Sentinel 1 SAFE - add calibration for GRD products #5826

Open sgofferj opened 2 years ago

sgofferj commented 2 years ago

I recently tried to work with calibrated bands from a Sentinel 1 GRDH product which resulted in errors. I posted on the mailing list (https://lists.osgeo.org/pipermail/gdal-dev/2022-May/055882.html) and @rouault very quickly created pull request #5812 . That pull request, however, only changes the display of CALIB bands for non-SLC products. It doesn't add any calibration. This does importantly remove a source of confusion.

However, also Sentinel 1 GRD products nowadays come with calibration data and at least ESA Sentinel SNAP is able to create calibrated intensity bands from that.

Here are axample data files which e.g. are in the annotation/calibration folder of S1A_IW_GRDH_1SDV_20220529T045822_20220529T045847_043421_052F5A_01B5.SAFE (UUID: c2380d61-207e-46c6-9ade-5cb1a0abdcd2): calibration.zip

I would like to suggest/request the addition of a calibration functionality for for GRD products to the Sentinel 1 SAFE drive.

pmallas commented 10 months ago

I second the motion.

rouault commented 10 months ago

I second the motion.

that's good, but code contributions are even more welcome ;-)