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/node155.html | 110 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) create mode 100644 src/slalib/sun67.htx/node155.html (limited to 'src/slalib/sun67.htx/node155.html') diff --git a/src/slalib/sun67.htx/node155.html b/src/slalib/sun67.htx/node155.html new file mode 100644 index 0000000..e7dc899 --- /dev/null +++ b/src/slalib/sun67.htx/node155.html @@ -0,0 +1,110 @@ + + + + +SLA_PRENUT - Precession/Nutation Matrix + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_PV2EL - Orbital Elements from Position/Velocity +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_PRECL - Precession Matrix (latest) +

+

+

SLA_PRENUT - Precession/Nutation Matrix +   +

+
+
ACTION: +
Form the matrix of precession and nutation (IAU 1976, FK5). +
CALL: +
CALL sla_PRENUT (EPOCH, DATE, RMATPN) +

+

+
GIVEN: +
+
+ + + + + + + + + +
EPOCHDJulian Epoch for mean coordinates
DATEDModified Julian Date (JD-2400000.5) +for true coordinates
+

+
RETURNED: +
+
+ + + + + +
RMATPND(3,3)combined precession/nutation matrix
+

+
NOTES: +
+
1. +
The epoch and date are TDB. +
2. +
The matrix is in the sense: +
vtrue = M$\cdot$vmean
+ where vtrue is the star vector relative to the + true equator and equinox of epoch DATE, M is the + $3\times3$ matrix RMATPN and + vmean is the star vector relative to the + mean equator and equinox of epoch EPOCH. +
+
+ +next + +up + +previous +
+ Next: SLA_PV2EL - Orbital Elements from Position/Velocity +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_PRECL - Precession Matrix (latest) +

+

+

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