HawkEye L2 coordinates - where are they stored?

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leon_c
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HawkEye L2 coordinates - where are they stored?

by leon_c » Tue May 02, 2023 10:40 am America/New_York

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!

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OB SeaDAS - dshea
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Re: HawkEye L2 coordinates - where are they stored?

by OB SeaDAS - dshea » Tue May 02, 2023 11:04 am America/New_York

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

leon_c
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Re: HawkEye L2 coordinates - where are they stored?

by leon_c » Tue May 02, 2023 11:08 am America/New_York

Got it, thanks!

leon_c
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Re: HawkEye L2 coordinates - where are they stored?

by leon_c » Tue May 09, 2023 1:47 pm America/New_York

Hi, another question, kind of related. The timestamp in the filename is UTC, right? Thanks!

OB SeaDAS - xuanyang02
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Re: HawkEye L2 coordinates - where are they stored?

by OB SeaDAS - xuanyang02 » Thu May 11, 2023 1:29 pm America/New_York

Yes.

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