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