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/node133.html | 111 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 111 insertions(+) create mode 100644 src/slalib/sun67.htx/node133.html (limited to 'src/slalib/sun67.htx/node133.html') diff --git a/src/slalib/sun67.htx/node133.html b/src/slalib/sun67.htx/node133.html new file mode 100644 index 0000000..a849a15 --- /dev/null +++ b/src/slalib/sun67.htx/node133.html @@ -0,0 +1,111 @@ + + + + +SLA_NUT - Nutation Matrix + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_NUTC - Nutation Components +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_MXV - Apply 3D Rotation +

+

+

SLA_NUT - Nutation Matrix +   +

+
+
ACTION: +
Form the matrix of nutation (IAU 1980 theory) for a given date. +
CALL: +
CALL sla_NUT (DATE, RMATN) +

+

+
GIVEN: +
+
+ + + + + +
DATEDTDB (formerly ET) as Modified Julian Date +(JD-2400000.5)
+

+
RETURNED: +
+
+ + + + + +
RMATND(3,3)nutation matrix
+

+
NOTE: +
The matrix is in the sense: +
vtrue = M$\cdot$vmean
+ where vtrue is the star vector relative to the + true equator and equinox of date, M is the + $3\times3$ matrix RMATN and + vmean is the star vector relative to the + mean equator and equinox of date. +
+

+
REFERENCES: +
+
1. +
Final report of the IAU Working Group on Nutation, +chairman P.K.Seidelmann, 1980. +
2. +
Kaplan, G.H., 1981. USNO circular No. 163, pA3-6. +
+
+ +next + +up + +previous +
+ Next: SLA_NUTC - Nutation Components +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_MXV - Apply 3D Rotation +

+

+

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