Radians to Deg,Min,Sec,Frac
CALL sla_DR2AF (NDP, ANGLE, SIGN, IDMSF)
NDP  I  number of decimal places of arcseconds 


ANGLE  D  angle in radians 
SIGN  C  ‘+’ or ‘$$’ 


IDMSF  I(4)  degrees, arcminutes, arcseconds, fraction 