Earth occultation in ScAtt + Local image analysis

[hiyoneda]

Following PR #381 , the Earth occultation is now considered in image analysis using local coordinate / scatt bin.

Basically, there are only two major changes:

1. Now SpacecraftAttitudeExposureTable keeps the information about the Earth zenith and altitude of the satellite, which will be used for the Earth occultation calculation.
2. In CoordsysConversionMatrix. spacecraft_attitude_binning_ccm, exposure time maps for all scatt bins are calculated. In this step, the Earth occultation is considered, and exposure time is set to zero if the Earth blocks a corresponding pixel.

Additionally, there are minor changes.

• These methods are removed because they are not used anymore.
  • CoordsysConversionMatrix. time_binning_ccm
• These methods are added
  • CoordsysConversionMatrix.calc_exposure_map: It can calculate an exposure map by convolving the exposure time map with the effective area for each scatt bin
  • SpacecraftAttitudeExposureTable.get_binned_data_scatt: It can generate a binned histogram from an event file. The generated histogram has 'ScAtt' in its axes. Initially, I planned to add it to the DataIO class, but considering that this approach (ScAtt + local) is not a default analysis, I decided to put it in SpacecraftAttitudeExposureTable to avoid confusion in the DataIO class.

[codecov]

Codecov Report

❌ Patch coverage is 97.22222% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.23%. Comparing base (e9dca56) to head (ee1076a).
⚠️ Report is 81 commits behind head on develop.

Files with missing lines	Patch %	Lines
cosipy/image_deconvolution/exposure_table.py	96.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ
.../image_deconvolution/coordsys_conversion_matrix.py	96.62% <100.00%> (-0.22%)	⬇️
cosipy/image_deconvolution/exposure_table.py	97.05% <96.00%> (-0.46%)	⬇️

... and 3 files with indirect coverage changes

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[GallegoSav]

I tested with DC3 response and files and it worked well