SUBROUTINE iau_S2PV ( THETA, PHI, R, TD, PD, RD, PV )
*+
* - - - - - - - - -
* i a u _ S 2 P V
* - - - - - - - - -
*
* Convert position/velocity from spherical to Cartesian coordinates.
*
* This routine is part of the International Astronomical Union's
* SOFA (Standards of Fundamental Astronomy) software collection.
*
* Status: vector/matrix support routine.
*
* Given:
* THETA d longitude angle (radians)
* PHI d latitude angle (radians)
* R d radial distance
* TD d rate of change of THETA
* PD d rate of change of PHI
* RD d rate of change of R
*
* Returned:
* PV d(3,2) pv-vector
*
* This revision: 2000 November 25
*
* SOFA release 2021-05-12
*
* Copyright (C) 2021 IAU SOFA Board. See notes at end.
*
*-----------------------------------------------------------------------
IMPLICIT NONE
DOUBLE PRECISION THETA, PHI, R, TD, PD, RD, PV(3,2)
DOUBLE PRECISION ST, CT, SP, CP, RCP, X, Y, RPD, W
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
ST = SIN(THETA)
CT = COS(THETA)
SP = SIN(PHI)
CP = COS(PHI)
RCP = R*CP
X = RCP*CT
Y = RCP*ST
RPD = R*PD
W = RPD*SP - CP*RD
PV(1,1) = X
PV(2,1) = Y
PV(3,1) = R*SP
PV(1,2) = - Y*TD - W*CT
PV(2,2) = X*TD - W*ST
PV(3,2) = RPD*CP + SP*RD
* Finished.
*+----------------------------------------------------------------------
*
* Copyright (C) 2021
* Standards Of Fundamental Astronomy Board
* of the International Astronomical Union.
*
* =====================
* SOFA Software License
* =====================
*
* NOTICE TO USER:
*
* BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
* CONDITIONS WHICH APPLY TO ITS USE.
*
* 1. The Software is owned by the IAU SOFA Board ("SOFA").
*
* 2. Permission is granted to anyone to use the SOFA software for any
* purpose, including commercial applications, free of charge and
* without payment of royalties, subject to the conditions and
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*
* 3. You (the user) may copy and distribute SOFA source code to others,
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*
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*
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*
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*
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*
*-----------------------------------------------------------------------
END