pub unsafe extern "C" fn source_setup_chief(
this: *mut source,
_photometric_band: *const c_char,
magnitude: *mut f32,
_zenith: *mut rtd,
_azimuth: *mut rtd,
_height: f32,
_N_SRC: c_int,
_L_: rtd,
_N_L_: c_int,
origin: vector,
chief_origin: vector,
)