SLA_PDQ2H - H.A. for a Given P.A.   

ACTION:

Hour Angle corresponding to a given parallactic angle (double precision).

CALL:

CALL sla_PDQ2H (P, D, Q, H1, J1, H2, J2)

GIVEN:

P latitude

D D declination

Q D azimuth

RETURNED:

H1 hour angle: first solution if any

J1 I flag: 0 = solution 1 is valid

H2 D hour angle: second solution if any

J2 I flag: 0 = solution 2 is valid