ppsp¶

erfa.ppsp(a, s, b)[source]¶

P-vector plus scaled p-vector.

Parameters:

adouble array
sdouble array
bdouble array

Returns:

apsbdouble array

Notes

Wraps ERFA function eraPpsp. The ERFA documentation is:

- - - - - - - -
 e r a P p s p
- - - - - - - -

P-vector plus scaled p-vector.

Given:
   a      double[3]     first p-vector
   s      double        scalar (multiplier for b)
   b      double[3]     second p-vector

Returned:
   apsb   double[3]     a + s*b

Note:
   It is permissible for any of a, b and apsb to be the same array.

Called:
   eraSxp       multiply p-vector by scalar
   eraPpp       p-vector plus 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.

Navigation

ppsp¶