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| author | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-03-04 21:21:30 -0500 |
|---|---|---|
| committer | Joseph Hunkeler <jhunkeler@gmail.com> | 2015-03-04 21:21:30 -0500 |
| commit | d54fe7c1f704a63824c5bfa0ece65245572e9b27 (patch) | |
| tree | afc52015ffc2c74e0266653eecef1c8ef8ba5d91 /src/slalib/sun67.htx/node125.html | |
| download | calfuse-d54fe7c1f704a63824c5bfa0ece65245572e9b27.tar.gz | |
Initial commit
Diffstat (limited to 'src/slalib/sun67.htx/node125.html')
| -rw-r--r-- | src/slalib/sun67.htx/node125.html | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/slalib/sun67.htx/node125.html b/src/slalib/sun67.htx/node125.html new file mode 100644 index 0000000..2542649 --- /dev/null +++ b/src/slalib/sun67.htx/node125.html @@ -0,0 +1,107 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<!--Converted with LaTeX2HTML 97.1 (release) (July 13th, 1997) + by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds +* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan +* with significant contributions from: + Jens Lippman, Marek Rouchal, Martin Wilck and others --> +<HTML> +<HEAD> +<TITLE>SLA_M2AV - Rotation Matrix to Axial Vector</TITLE> +<META NAME="description" CONTENT="SLA_M2AV - Rotation Matrix to Axial Vector"> +<META NAME="keywords" CONTENT="sun67"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> +<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso_8859_1"> +<LINK REL="STYLESHEET" HREF="sun67.css"> +<LINK REL="next" HREF="node126.html"> +<LINK REL="previous" HREF="node124.html"> +<LINK REL="up" HREF="node13.html"> +<LINK REL="next" HREF="node126.html"> +</HEAD> +<BODY > +<BR> <HR> +<A NAME="tex2html1676" HREF="node126.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html1674" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html1668" HREF="node124.html"> +<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="previous_motif.gif"></A> <A HREF="sun67.html#stardoccontents"><IMG ALIGN="BOTTOM" BORDER="0" + SRC="contents_motif.gif"></A> +<BR> +<B> Next:</B> <A NAME="tex2html1677" HREF="node126.html">SLA_MAP - Mean to Apparent</A> +<BR> +<B>Up:</B> <A NAME="tex2html1675" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html1669" HREF="node124.html">SLA_KBJ - Select Epoch Prefix</A> +<BR> <HR> <P> +<P><!--End of Navigation Panel--> +<H2><A NAME="SECTION0004112000000000000000">SLA_M2AV - Rotation Matrix to Axial Vector</A> +<A NAME="xref_SLA_M2AV"> </A><A NAME="SLA_M2AV"> </A> +</H2> + <DL> +<DT><STRONG>ACTION:</STRONG> +<DD>From a rotation matrix, determine the corresponding axial vector +(single precision). +<P> <DT><STRONG>CALL:</STRONG> +<DD><TT>CALL sla_M2AV (RMAT, AXVEC)</TT> +<P> </DL> +<P> <DL> +<DT><STRONG>GIVEN:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>RMAT</EM></TD> +<TH ALIGN="LEFT"><B>R(3,3)</B></TH> +<TD ALIGN="LEFT" NOWRAP>rotation matrix</TD> +</TR> +</TABLE></DL> +<P> <DL> +<DT><STRONG>RETURNED:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>AXVEC</EM></TD> +<TH ALIGN="LEFT"><B>R(3)</B></TH> +<TD ALIGN="LEFT" NOWRAP>axial vector (radians)</TD> +</TR> +</TABLE></DL> +<P> <DL> +<DT><STRONG>NOTES:</STRONG> +<DD><DL COMPACT> +<DT>1. +<DD>A rotation matrix describes a rotation about some arbitrary axis. +The axis is called the <I>Euler axis</I>, and the angle through +which the reference frame rotates is called the <I>Euler angle</I>. + The <I>axial vector</I> returned by this routine has the same + direction as the Euler axis, and its magnitude is the Euler angle + in radians. + <DT>2. +<DD>The magnitude and direction of the axial vector can be separated + by means of the routine sla_VN. + <DT>3. +<DD>The reference frame rotates clockwise as seen looking along + the axial vector from the origin. + <DT>4. +<DD>If RMAT is null, so is the result. + </DL></DL> +<BR> <HR> +<A NAME="tex2html1676" HREF="node126.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html1674" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html1668" HREF="node124.html"> +<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="previous_motif.gif"></A> <A HREF="sun67.html#stardoccontents"><IMG ALIGN="BOTTOM" BORDER="0" + SRC="contents_motif.gif"></A> +<BR> +<B> Next:</B> <A NAME="tex2html1677" HREF="node126.html">SLA_MAP - Mean to Apparent</A> +<BR> +<B>Up:</B> <A NAME="tex2html1675" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html1669" HREF="node124.html">SLA_KBJ - Select Epoch Prefix</A> +<BR> <HR> <P> +<P><!--End of Navigation Panel--> +<ADDRESS> +<I>SLALIB --- Positional Astronomy Library<BR>Starlink User Note 67<BR>P. T. Wallace<BR>12 October 1999<BR>E-mail:ptw@star.rl.ac.uk</I> +</ADDRESS> +</BODY> +</HTML> |