rxpv¶
- erfa.rxpv(r, pv)[source]¶
Multiply a pv-vector by an r-matrix.
- Parameters:
- rdouble array
- pvdouble array
- Returns:
- rpvdouble array
Notes
Wraps ERFA function
eraRxpv
. The ERFA documentation is:- - - - - - - - e r a R x p v - - - - - - - - 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) 2013-2023, NumFOCUS Foundation. Derived, with permission, from the SOFA library. See notes at end of file.