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Hi again,
Replying to myself...
>
> Geostationary
> -------------
>
> grid_mapping_name = geos
>
>
> Map parameters:
>
> latitude_of_projection_origin
>
> longitude_of_projection_origin
>
> perspective_point_height
>
> scale_x
>
> scale_y
>
> offset_x
>
> offset_y
>
> false_easting
>
> false_northing
>
Actually, we could use add_offset and scale_factor in the x and y
variables. x and y would then be integer pixel positions for example,
and scale and offset would transform them to viewing angles in radians.
The netcdf header would look like this (hand typed):
dimensions:
y = 328;
x = 580;
reflective_bands = 5;
variables:
short reflective_band_data(y, x, reflective_bands)
:long_name = "Radiance of reflective bands of the SEVIRI instrument
(MSG)";
:units = "milliwatts/m2/steradian/cm-1";
:grid_mapping = "Projection";
:coordinates = "y x";
short x(x);
:standard_name = "projection_x_coordinate";
:add_offset = 1856
:scale_factor = -208.16554260253906
:units = "rad"
short y(y);
:standard_name = "projection_y_coordinate";
:add_offset = 1856
:scale_factor = -208.16554260253906
:units = "rad"
char Projection;
:grid_mapping_name = "geos";
:perspective_point_height = 35785831.;
:semi_major_axis = 6378169.;
:semi_minor_axis = 6356583.8;
:latitude_of_projection_origin = 0.;
:longitude_of_projection_origin = 0.;
What do you think ?
Best regards,
Martin
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