sky_to_fov

gammapy.utils.coordinates.sky_to_fov(lon, lat, lon_pnt, lat_pnt)

Transform sky coordinates to field-of-view coordinates.

Parameters:

lon, latQuantity

Sky coordinate to be transformed.

lon_pnt, lat_pntQuantity

Coordinate specifying the pointing position. (i.e. the center of the field of view.)

Returns:

lon_t, lat_tQuantity

Transformed field-of-view coordinate.