typedef struct { mrcRefDegCoordinate ip; mrcRefDegCoordinate iw; mrcRefDegCoordinate ia; mrcRefDegCoordinate dp; mrcRefDegCoordinate dw; mrcRefDegCoordinate da; mrcRefDegCoordinate wp; mrcRefDegCoordinate ww; mrcRefDegCoordinate wa; } mrcRefHeader;