sofars::vm

Function s2pv

Source 
pub fn s2pv(
    theta: f64,
    phi: f64,
    r: f64,
    td: f64,
    pd: f64,
    rd: f64,
) -> [[f64; 3]; 2]
Expand description

Convert position/velocity from spherical to Cartesian coordinates.

This function is part of the International Astronomical Union’s SOFA (Standards of Fundamental Astronomy) software collection.

Status: vector/matrix support function.

Given:

   theta    double          longitude angle (radians)
   phi      double          latitude angle (radians)
   r        double          radial distance
   td       double          rate of change of theta
   pd       double          rate of change of phi
   rd       double          rate of change of r

Returned:

   pv       double[2][3]    pv-vector