From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node151.html | 111 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 src/slalib/sun67.htx/node151.html (limited to 'src/slalib/sun67.htx/node151.html') diff --git a/src/slalib/sun67.htx/node151.html b/src/slalib/sun67.htx/node151.html new file mode 100644 index 0000000..f7c9a66 --- /dev/null +++ b/src/slalib/sun67.htx/node151.html @@ -0,0 +1,111 @@ + + + + +SLA_PREBN - Precession Matrix (FK4) + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_PREC - Precession Matrix (FK5) +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_POLMO - Polar Motion +

+

+

SLA_PREBN - Precession Matrix (FK4) +   +

+
+
ACTION: +
Generate the matrix of precession between two epochs, +using the old, pre IAU 1976, Bessel-Newcomb model, in + Andoyer's formulation. +

CALL: +
CALL sla_PREBN (BEP0, BEP1, RMATP) +

+

+
GIVEN: +
+
+ + + + + + + + + +
BEP0Dbeginning Besselian epoch
BEP1Dending Besselian epoch
+

+
RETURNED: +
+
+ + + + + +
RMATPD(3,3)precession matrix
+

+
NOTE: +
The matrix is in the sense: +
v1 = M$\cdot$v0
+ where v1 is the star vector relative to the + mean equator and equinox of epoch BEP1, M is the + $3\times3$ matrix RMATP and + v0 is the star vector relative to the + mean equator and equinox of epoch BEP0. +
+

+
REFERENCE: +
Smith et al., 1989. Astr.J. 97, 269. +
+
+ +next + +up + +previous +
+ Next: SLA_PREC - Precession Matrix (FK5) +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_POLMO - Polar Motion +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit