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## SLA_DR2AF - Radians to Deg,Min,Sec,Frac

ACTION:
Convert an angle in radians to degrees, arcminutes, arcseconds, fraction (double precision).

CALL:
CALL sla_DR2AF (NDP, ANGLE, SIGN, IDMSF)

GIVEN:

 I NDP number of decimal places of arcseconds ANGLE D angle in radians

RETURNED:

 C SIGN +' 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). For example, on a VAX computer, for ANGLE up to , the available floating-point precision corresponds roughly to NDP=12. However, the practical limit is NDP=9, set by the capacity of the 32-bit integer IDMSF(4).
3.
The absolute value of ANGLE may exceed . In cases where it does not, it is up to the caller to test for and handle the case where ANGLE is very nearly and rounds up to , by testing for IDMSF(1)=360 and setting IDMSF(1-4) to zero.

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Previous: SLA_DPAV - Position-Angle Between Two Directions

SLALIB --- Positional Astronomy Library