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sertit / eoreader

Remote-sensing opensource python library reading optical and SAR sensors, loading and stacking bands, clouds, DEM and spectral indices in a sensor-agnostic way.
https://eoreader.readthedocs.io/en/latest/
Apache License 2.0
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BUG: CSG + calibration step #48

Closed remi-braun closed 1 year ago

remi-braun commented 2 years ago

For some reason, applying a calibration step in SNAP to some CSG products outputs an empty raster. The workaround is to use the cplx_no_calib_preprocess_default.xml graph instead.

import os
from eoreader.reader import Reader
from eoreader.bands import VV
from eoreader.env_vars import PP_GRAPH

os.environ[PP_GRAPH]="path/to/eoreader/data/cplx_no_calib_preprocess_default.xml"

path = r"CSG_SCS_1254349-1052847"
prod = Reader().open(path)
prod.load(VV)

This may be worth investiguating (when having more CSG data?)

remi-braun commented 2 years ago

SNAP 9.0 doesn't seem to fix this. Nothing found on STEP forum either...

remi-braun commented 1 year ago

By default, calibration is not applied to slant range CSG data, avoiding producing an empty raster. Implemented in commit 1ef71ff315dc6aca540d4c1796528b6f8e2cda8b