Convert an angle in radians to degrees, arcminutes, arcseconds. (double precision)
ndp int number of decimal places of arcseconds angle double angle in radians
sign char* '+' or '-' idmsf long[4] degrees, arcminutes, arcseconds, fraction
slaDd2tf Defined in slamac.h: D15B2P P.T.Wallace Starlink 18 November 1993