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SLA_PDQ2H - H.A. for a Given P.A.
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SUBPROGRAM SPECIFICATIONS
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SLA_PCD - Apply Radial Distortion
SLA_PDA2H - H.A. for a Given Azimuth
ACTION:
Hour Angle corresponding to a given azimuth (double precision).
CALL:
CALL sla_PDA2H (P, D, A, H1, J1, H2, J2)
GIVEN:
P
D
latitude
D
D
declination
A
D
azimuth
RETURNED:
H1
D
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
Next:
SLA_PDQ2H - H.A. for a Given P.A.
Up:
SUBPROGRAM SPECIFICATIONS
Previous:
SLA_PCD - Apply Radial Distortion
SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk
