SLA_CS2C6 - Spherical Pos/Vel to Cartesian

ACTION:

Conversion of position & velocity in spherical coordinates to Cartesian coordinates (single precision).

CALL:

CALL sla_CS2C6 (A, B, R, AD, BD, RD, V)

GIVEN:

A	R	longitude (radians) - for example $\alpha$
B	R	latitude (radians) - for example $\delta$
R	R	radial coordinate
AD	R	longitude derivative (radians per unit time)
BD	R	latitude derivative (radians per unit time)
RD	R	radial derivative

RETURNED:

V

R(6)

$[\,x,y,z,\dot{x},\dot{y},\dot{z}\,]$

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.