From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node114.html | 107 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 src/slalib/sun67.htx/node114.html (limited to 'src/slalib/sun67.htx/node114.html') diff --git a/src/slalib/sun67.htx/node114.html b/src/slalib/sun67.htx/node114.html new file mode 100644 index 0000000..a2e570a --- /dev/null +++ b/src/slalib/sun67.htx/node114.html @@ -0,0 +1,107 @@ + + + + +SLA_GEOC - Geodetic to Geocentric + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_GMST - UT to GMST +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_GE50 - Galactic to B1950 +

+

+

SLA_GEOC - Geodetic to Geocentric +   +

+
+
ACTION: +
Convert geodetic position to geocentric. +
CALL: +
CALL sla_GEOC (P, H, R, Z) +

+

+
GIVEN: +
+
+ + + + + + + + + +
PDlatitude (geodetic, radians)
HDheight above reference spheroid (geodetic, metres)
+

+
RETURNED: +
+
+ + + + + + + + + +
RDdistance from Earth axis (AU)
ZDdistance from plane of Earth equator (AU)
+

+
NOTES: +
+
1. +
Geocentric latitude can be obtained by evaluating ATAN2(Z,R). +
2. +
IAU 1976 constants are used. +
+

+
REFERENCE: +
Green, R.M., 1985. Spherical Astronomy, Cambridge U.P., p98. +
+
+ +next + +up + +previous +
+ Next: SLA_GMST - UT to GMST +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_GE50 - Galactic to B1950 +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit