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SUBPROGRAM SPECIFICATIONS
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SLA_ECLEQ - Ecliptic to Equatorial
ACTION:
Transformation from ecliptic longitude and latitude to J2000.0
.
CALL:
CALL sla_ECLEQ (DL, DB, DATE, DR, DD)
GIVEN:
DL,DB
D
ecliptic longitude and latitude (mean of date, IAU 1980 theory, radians)
DATE
D
TDB (formerly ET) as Modified Julian Date (JD-2400000.5)
RETURNED:
DR,DD
D
J2000.0 mean
(radians)
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SLA_ECMAT - Form Matrix
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SUBPROGRAM SPECIFICATIONS
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SLA_EARTH - Approx Earth Pos/Vel
SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk