Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/computing/software/gipsy/sub/irco_transmat.dc2 Дата изменения: Thu Jan 23 17:11:08 1992 Дата индексирования: Sat Jan 17 00:31:30 2009 Кодировка:

Subroutine: IRCO_TRANSMAT

Purpose: defines transformation matrix from Euler angles

Category WORLD COORDINATES, IRAS

File: irco.shl

Author: Do Kester

Person resp.: Do Kester

Address: guspace!do or rugfx4!do (uucp)

Use: call irco_transmat(
zold, I double precision
theta, I double precision
znew, I double precision
mat ) O double precision array(3,3)

Description:
MAT is a right-handed rotation matrix with its z-axis directing to
the north pole and its x-axis pointing to longitude = 0.
90 - ZOLD is the longitude of the ascending node in the old system
oldlong = 90 - ZOLD => ZOLD = 90 - oldlong
THETA is the angle between the poles of the old and the new system
90 + ZNEW is the longitude of the ascending node in the new system
newlong = 90 + ZNEW => ZNEW = newlong - 90
The rotation matrix follows the description in Lieske etal. 1977

Externals:

Updates: 5 jan 1990 DK, documentation only