question: compute celestial coordinates of zenith from utc , lat long . concode_field_sep float RADIANS_TO_DEGREES concode_elem_sep float DEGREES_TO_RADIANS concode_field_sep Vector3 vectorProduct concode_elem_sep Vector3 addVectors concode_elem_sep Matrix33 calculateRotationMatrix concode_elem_sep float mod2pi concode_elem_sep Matrix33 matrixMultiply concode_elem_sep float abs_floor concode_elem_sep Vector3 matrixVectorMultiply concode_elem_sep Vector3 scaleVector concode_elem_sep GeocentricCoordinates getXYZ concode_elem_sep float cosineSimilarity concode_elem_sep float scalarProduct
target: RaDec function ( Date arg0 , LatLong arg1 ) { float loc0 = TimeUtil . meanSiderealTime ( arg0 , arg1 . longitude ) ; float loc1 = arg1 . latitude ; return new RaDec ( loc0 , loc1 ) ; }