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| author | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-07-08 20:46:52 -0400 |
|---|---|---|
| committer | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-07-08 20:46:52 -0400 |
| commit | fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 (patch) | |
| tree | bdda434976bc09c864f2e4fa6f16ba1952b1e555 /math/slalib/doc/pm.hlp | |
| download | iraf-linux-fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4.tar.gz | |
Initial commit
Diffstat (limited to 'math/slalib/doc/pm.hlp')
| -rw-r--r-- | math/slalib/doc/pm.hlp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/math/slalib/doc/pm.hlp b/math/slalib/doc/pm.hlp new file mode 100644 index 00000000..a6d755ff --- /dev/null +++ b/math/slalib/doc/pm.hlp @@ -0,0 +1,45 @@ +.help pm Jun99 "Slalib Package" +.nf + + SUBROUTINE slPM (R0, D0, PR, PD, PX, RV, EP0, EP1, R1, D1) + + - - - + P M + - - - + + Apply corrections for proper motion to a star RA,Dec + (double precision) + + References: + 1984 Astronomical Almanac, pp B39-B41. + (also Lederle & Schwan, Astron. Astrophys. 134, + 1-6, 1984) + + Given: + R0,D0 dp RA,Dec at epoch EP0 (rad) + PR,PD dp proper motions: RA,Dec changes per year of epoch + PX dp parallax (arcsec) + RV dp radial velocity (km/sec, +ve if receding) + EP0 dp start epoch in years (e.g. Julian epoch) + EP1 dp end epoch in years (same system as EP0) + + Returned: + R1,D1 dp RA,Dec at epoch EP1 (rad) + + Called: + slDS2C spherical to Cartesian + slDC2S Cartesian to spherical + slDA2P normalize angle 0-2Pi + + Note: + The proper motions in RA are dRA/dt rather than + cos(Dec)*dRA/dt, and are in the same coordinate + system as R0,D0. + + P.T.Wallace Starlink 23 August 1996 + + Copyright (C) 1996 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp |