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/node51.html | 99 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 src/slalib/sun67.htx/node51.html (limited to 'src/slalib/sun67.htx/node51.html') diff --git a/src/slalib/sun67.htx/node51.html b/src/slalib/sun67.htx/node51.html new file mode 100644 index 0000000..1a8cb1b --- /dev/null +++ b/src/slalib/sun67.htx/node51.html @@ -0,0 +1,99 @@ + + + + +SLA_DCS2C - Spherical to Cartesian + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_DD2TF - Days to Hour,Min,Sec +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DCMPF - Interpret Linear Fit +

+

+

SLA_DCS2C - Spherical to Cartesian +   +

+
+
ACTION: +
Spherical coordinates to Cartesian coordinates (double precision). +
CALL: +
CALL sla_DCS2C (A, B, V) +

+

+
GIVEN: +
+
+ + + + + +
A,BDspherical coordinates in radians: $[\,\alpha,\delta\,]$ etc.
+

+
RETURNED: +
+
+ + + + + +
VD(3)$[\,x,y,z\,]$ unit vector
+

+
NOTE: +
The spherical coordinates are longitude (+ve anticlockwise +looking from the +ve latitude pole) and latitude. The + Cartesian coordinates are right handed, with the x-axis + at zero longitude and latitude, and the z-axis at the + +ve latitude pole. +
+
+ +next + +up + +previous +
+ Next: SLA_DD2TF - Days to Hour,Min,Sec +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DCMPF - Interpret Linear Fit +

+

+

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