atan2d            148 date/lib/astro.c 	v = atan2d(y, x);                  /* True anomaly */
atan2d            174 date/lib/astro.c 	*RA = atan2d(y, x);
atan2d            175 date/lib/astro.c 	*dec = atan2d(z, sqrt(x*x + y*y));