Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Fix geos proj parameters for Insat 3d satellites #2969

Merged
merged 4 commits into from
Nov 13, 2024
Merged

Fix geos proj parameters for Insat 3d satellites #2969

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
b7f0738
Fix geos proj parameters for insat 3d satellites
mraspaud Nov 6, 2024
6643a88
Fix typo
mraspaud Nov 6, 2024
aca867c
Fix offset
mraspaud Nov 7, 2024
73fc304
Merge branch 'main' into fix-insat-geoloc
mraspaud Nov 7, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 6 additions & 3 deletions satpy/readers/insat3d_img_l1b_h5.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -179,7 +179,10 @@ def get_area_def(self, ds_id):
#fov = self.datatree.attrs["Field_of_View(degrees)"]
fov = 18
cfac = 2 ** 16 / (fov / cols)
lfac = 2 ** 16 / (fov / lines)

# From reverse engineering metadata from a netcdf file, we discovered
# the lfac is actually the same as cfac, ie dependent on cols, not lines!
lfac = 2 ** 16 / (fov / cols)
djhoese marked this conversation as resolved.
Show resolved Hide resolved

h = self.datatree.attrs["Observed_Altitude(km)"] * 1000
# WGS 84
Expand All @@ -191,8 +194,8 @@ def get_area_def(self, ds_id):
pdict = {
"cfac": cfac,
"lfac": lfac,
"coff": cols / 2,
"loff": lines / 2,
"coff": cols // 2 + 1,
"loff": lines // 2,
"ncols": cols,
"nlines": lines,
"scandir": "N2S",
Expand Down
2 changes: 2 additions & 0 deletions satpy/tests/reader_tests/test_insat3d_img_l1b_h5.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -280,6 +280,8 @@ def test_filehandler_returns_area(insat_filehandler):
area_def = fh.get_area_def(ds_id)
_ = area_def.get_lonlats(chunks=1000)
assert subsatellite_longitude == area_def.crs.to_cf()["longitude_of_projection_origin"]
np.testing.assert_allclose(area_def.area_extent, [-5620072.101427, -5640108.009097,
5620072.101427, 5644115.190631])


def test_filehandler_has_start_and_end_time(insat_filehandler):
Expand Down
Loading