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SLA_CS2C - Spherical to Cartesian   

ACTION:
Spherical coordinates to Cartesian coordinates (single precision).
CALL:
CALL sla_CS2C (A, B, V)

GIVEN:

A,B R spherical coordinates in radians: $[\,\alpha,\delta\,]$ etc.

RETURNED:

V R(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_CS2C6 - Spherical Pos/Vel to Cartesian
Up: SUBPROGRAM SPECIFICATIONS
Previous: SLA_CR2TF - Radians to Hour,Min,Sec

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