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era.rxpv.md

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eraRxpv

rpv = ERFA.rxpv(r, pv)

Multiply a pv-vector by an r-matrix.

Given:

   r        double[3][3]    r-matrix
   pv       double[2][3]    pv-vector

Returned:

   rpv      double[2][3]    r * pv

Notes:

  1. The algorithm is for the simple case where the r-matrix r is not a function of time. The case where r is a function of time leads to an additional velocity component equal to the product of the derivative of r and the position vector.

  2. It is permissible for pv and rpv to be the same array.

Called:

   eraRxp       product of r-matrix and p-vector

This revision: 2021 May 11

Copyright (C) 2013-2021, NumFOCUS Foundation. Derived, with permission, from the SOFA library.