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HawkEye L2 coordinates - where are they stored?
Posted: Tue May 02, 2023 10:40 am America/New_York
by leon_c
Hi all!
I'm thinkering a bit with the HawkEye L2 data, but I seem not to be able to find the coordinates.
I've unpacked the .nc file using
Code: Select all
nc = xarray.open_dataset(file, group = "geophysical_data")
Could you please point me to the storage location of the coordinates? Thank you!
Re: HawkEye L2 coordinates - where are they stored?
Posted: Tue May 02, 2023 11:04 am America/New_York
by OB SeaDAS - dshea
There geolocation is not in the geophysical_data group. The lat/lon for each pixel is stored in the navigation_data group. Output from ncdump:
Code: Select all
group: navigation_data {
variables:
float longitude(number_of_lines, pixel_control_points) ;
longitude:long_name = "Longitude" ;
longitude:units = "degrees_east" ;
longitude:standard_name = "longitude" ;
longitude:_FillValue = -999.f ;
longitude:valid_min = -180.f ;
longitude:valid_max = 180.f ;
float latitude(number_of_lines, pixel_control_points) ;
latitude:long_name = "Latitude" ;
latitude:units = "degrees_north" ;
latitude:standard_name = "latitude" ;
latitude:_FillValue = -999.f ;
latitude:valid_min = -90.f ;
latitude:valid_max = 90.f ;
don
Re: HawkEye L2 coordinates - where are they stored?
Posted: Tue May 02, 2023 11:08 am America/New_York
by leon_c
Got it, thanks!
Re: HawkEye L2 coordinates - where are they stored?
Posted: Tue May 09, 2023 1:47 pm America/New_York
by leon_c
Hi, another question, kind of related. The timestamp in the filename is UTC, right? Thanks!
Re: HawkEye L2 coordinates - where are they stored?
Posted: Thu May 11, 2023 1:29 pm America/New_York
by OB SeaDAS - xuanyang02
Yes.