Open normanb opened 2 days ago
The specification can be found on Capella's site: https://support.capellaspace.com/hc/en-us/articles/5607458273940-SAR-Imagery-Products-Format-Specification
Capella provides SICD which can be read by SARPy's SICD reader. For example, the SICD for this dataset can be found at https://capella-open-data.s3.amazonaws.com/data/2024/10/11/CAPELLA_C15_SP_SICD_HH_20241011085812_20241011085836/CAPELLA_C15_SP_SICD_HH_20241011085812_20241011085836.ntf
As SICD is directly available, the Capella Tiff converter has not been actively maintained. This dataset is processed as PFA, which is not supported by the Capella converter.
The SICD file is parsed fine, thank you for the clarification and the link to the product spec.
I understand that Capella (and Umbra) use PFA for image formation, as SarPy retrieves the image data when you say PFA is not supported by the Capella Converter what are you referring to? Are you referring to the retrieval of PFA metadata with the Capella TIFF converter?
The modules under sarpy.io.complex
parse complex images and convert native metadata to SICD metadata. In many cases this conversion is not trivial and involves computation, not just retrieval. capella.py
was written before Capella produced SLCs with type==pfa
and as such it does not have logic for converting into SICD's PFA metadata.
I am using the Capella Open Data in particular this SLC tiff
https://capella-open-data.s3.amazonaws.com/data/2024/10/11/CAPELLA_C15_SP_SLC_HH_20241011085812_20241011085836/CAPELLA_C15_SP_SLC_HH_20241011085812_20241011085836.tif
I convert this tiff file to uncompressed with
gdal_translate co TILED=no CAPELLA_C15_SP_SLC_HH_20241011085812_20241011085836.tif capella_uncompressed.tif
And open this with sarpy
Which gives this error
Is there a specification for the Capella SLC product so I can check whether
delta_line_time
is a required parameter and put a PR for the fix together? Or is this a data product issue?