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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/ecmat.hlp | |
| download | iraf-linux-fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4.tar.gz | |
Initial commit
Diffstat (limited to 'math/slalib/doc/ecmat.hlp')
| -rw-r--r-- | math/slalib/doc/ecmat.hlp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/math/slalib/doc/ecmat.hlp b/math/slalib/doc/ecmat.hlp new file mode 100644 index 00000000..a9be4579 --- /dev/null +++ b/math/slalib/doc/ecmat.hlp @@ -0,0 +1,34 @@ +.help ecmat Jun99 "Slalib Package" +.nf + + SUBROUTINE slECMA (DATE, RMAT) + + - - - - - - + E C M A + - - - - - - + + Form the equatorial to ecliptic rotation matrix - IAU 1980 theory + (double precision) + + Given: + DATE dp TDB (loosely ET) as Modified Julian Date + (JD-2400000.5) + Returned: + RMAT dp(3,3) matrix + + Reference: + Murray,C.A., Vectorial Astrometry, section 4.3. + + Note: + The matrix is in the sense V(ecl) = RMAT * V(equ); the + equator, equinox and ecliptic are mean of date. + + Called: slDEUL + + 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 |