this is regarding slstr_l1b geometry

[kameshvinjamuri]

the slstr_l1b files have different stripes, but the geometry is only for the 't' stripe, geometry_tn.nc. or geometry_to.nc . But when I read the solar_zenith_angle or any other viewing angle from geometry_tn.nc. files, I get it at the native resolution of stripe 'a' , how can I get the geometric angles for the size of stripe 'i'

should change CHUNK_SIZE in satpy/etc/readers/slstr_l1b.yaml?

[kameshvinjamuri]

hi, I think if you mentioned resolution='1000' or '500', then the data are read in those spatial extents. no need to change .yaml (if someone have the same doubt)

dq = DataQuery(name='solar_azimuth_angle', stripe='i', view='nadir', resolution=1000)

[djhoese]

@kameshvinjamuri Could you please provide example code, what you expect the results to be, and what you're actually getting? It looks like you deleted the github issue template which asks for this information.

[kameshvinjamuri]

hi @djhoese sorry for getting back late, i was with no internet, for the past few days.
i didn't delete anything if i am not wrong! i edited some stuff to make more sense
so, the slstr has different resolutions (.5km, 1km) for different stripes (a,b, and c). but the viewing angles (sza, vza ...) are given at the tie point grid which is an extrapolated grid for both .5km and 1km.
previously i read like the following

dq = DataQuery(name='solar_azimuth_angle', stripe='i', view='nadir')
var_ret = load_data(dq, scn)

but this one gives the dimension of .5km (by default it seems). but i need for 1km. for all other data change the stripe the resolution changes, but for viewing angles it is not the case (since there is only one stripe for this data product). it is better to give resolution to it (as resolution is also a variable from .yaml files). the following worked

dq = DataQuery(name='solar_azimuth_angle', stripe='i', view='nadir', resolution=1000)
var_ret = load_data(dq, scn)

i hope my understanding is correct?

[djhoese]

This is how I understand this as well. Here in the YAML

satpy/satpy/etc/readers/slstr_l1b.yaml

Lines 293 to 301 in 442325d

	solar_azimuth_angle:
	name: solar_azimuth_angle
	sensor: slstr
	resolution: [500, 1000]
	coordinates: [longitude, latitude]
	view: [nadir, oblique]
	standard_name: solar_azimuth_angle
	file_type: esa_angles
	file_key: solar_azimuth_t{view:1s}

There is no "stripe" defined so specifying that likely has no effect in your DataQuery (it is ignored). You need to specify the resolution if you want a specific one. By default Satpy will try to find the finest/highest resolution version of a requested product if not specified by the user (500 in this case).