### SLA_DR2AF

ACTION:
Convert an angle in radians to degrees, arcminutes, arcseconds, fraction (double precision).
CALL:
CALL sla_DR2AF (NDP, ANGLE, SIGN, IDMSF)
##### GIVEN:
 NDP I number of decimal places of arcseconds ANGLE D angle in radians

##### RETURNED:
 SIGN C ‘+’ or ‘$-$’ IDMSF I(4) degrees, arcminutes, arcseconds, fraction

NOTES:
(1)
NDP less than zero is interpreted as zero.
(2)
The largest useful value for NDP is determined by the size of ANGLE, the format of DOUBLE PRECISION floating-point numbers on the target machine, and the risk of overflowing IDMSF(4). On some architectures, for ANGLE up to 2pi, the available floating-point precision corresponds roughly to NDP=12. However, the practical limit is NDP=9, set by the capacity of a typical 32-bit IDMSF(4).
(3)
The absolute value of ANGLE may exceed $2\pi$. In cases where it does not, it is up to the caller to test for and handle the case where ANGLE is very nearly $2\pi$ and rounds up to $36{0}^{\circ }$, by testing for IDMSF(1)=360 and setting IDMSF(1-4) to zero.