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- Form the matrix of nutation
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<H2><A NAME="SECTION000443000000000000000"></A><A NAME="____palNut_"></A>
<BR>
palNut
palNut
- Form the matrix of nutation
</H2>
<DL>
<DT><STRONG>Description:</STRONG></DT>
<DD><DL>
<DD>Form the matrix of nutation for a given date using
the IAU 2006 nutation model and palDeuler.
</DD>
</DL>
<BR>
</DD>
<DT><STRONG>Invocation:</STRONG></DT>
<DD><DL>
<DD><TT> void palNut( double date, double rmatn[3][3] );
</TT>
</DD>
</DL>
<BR>
</DD>
<DT><STRONG>Arguments:</STRONG></DT>
<DD>
<BR> <DL>
<DT><STRONG>
date = double (Given)
</STRONG></DT>
<DD>
TT as modified Julian date (JD-2400000.5)
</DD>
<DT><STRONG>
rmatn = double [3][3] (Returned)
</STRONG></DT>
<DD>
Nutation matrix in the sense v(true)=rmatn <SPAN CLASS="MATH"><IMG
WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
SRC="img1.png"
ALT="$*$"></SPAN> v(mean)
where v(true) is the star vector relative to the
true equator and equinox of date and v(mean) is the
star vector relative to the mean equator and equinox
of date.
</DD>
</DL>
<BR>
</DD>
<DT><STRONG>Notes:</STRONG></DT>
<DD><UL>
<LI>Uses iauNut06a via palNutc
<P>
</LI>
<LI>The distinction between TDB and TT is negligible. For all but
the most critical applications UTC is adequate.
</LI>
</UL>
<BR>
</DD>
</DL>
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