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<H2><A NAME="SECTION00049000000000000000">SLA_AOPPAT - Update Appt-to-Obs Parameters</A>
<A NAME="xref_SLA_AOPPAT">&#160;</A><A NAME="SLA_AOPPAT">&#160;</A>
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       <DL>
<DT><STRONG>ACTION:</STRONG>
<DD>Recompute the sidereal time in the apparent to observed place
star-independent parameter block.
<P>    <DT><STRONG>CALL:</STRONG>
<DD><TT>CALL sla_AOPPAT (DATE, AOPRMS)</TT>
<P>       </DL>
<P>     <DL>
<DT><STRONG>GIVEN:</STRONG>
<DD>
<BR>
<TABLE CELLPADDING=3>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>DATE</EM></TD>
<TH ALIGN="LEFT"><B>D</B></TH>
<TD ALIGN="LEFT" NOWRAP>UTC date/time (Modified Julian Date, JD-2400000.5)</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>AOPRMS</EM></TD>
<TD ALIGN="LEFT"><B>D(14)</B></TD>
<TD ALIGN="LEFT" NOWRAP>star-independent apparent-to-observed parameters:</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="CENTER" NOWRAP COLSPAN=1>(1-12)</TD>
<TD></TD>
<TD ALIGN="LEFT" NOWRAP>not required</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="CENTER" NOWRAP COLSPAN=1>(13)</TD>
<TD></TD>
<TD ALIGN="LEFT" NOWRAP>longitude + eqn of equinoxes +
``sidereal <IMG WIDTH="16" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
 SRC="img19.gif"
 ALT="$\Delta$">UT'' (radians)</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="CENTER" NOWRAP COLSPAN=1>(14)</TD>
<TD></TD>
<TD ALIGN="LEFT" NOWRAP>not required</TD>
</TR>
</TABLE></DL>
<P>     <DL>
<DT><STRONG>RETURNED:</STRONG>
<DD>
<BR>
<TABLE CELLPADDING=3>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>AOPRMS</EM></TD>
<TH ALIGN="LEFT"><B>D(14)</B></TH>
<TD ALIGN="LEFT" NOWRAP>star-independent apparent-to-observed parameters:</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="CENTER" NOWRAP COLSPAN=1>(1-13)</TD>
<TD></TD>
<TD ALIGN="LEFT" NOWRAP>not changed</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="CENTER" NOWRAP COLSPAN=1>(14)</TD>
<TD></TD>
<TD ALIGN="LEFT" NOWRAP>local apparent sidereal time (radians)</TD>
</TR>
</TABLE></DL>
<P>      <DL>
<DT><STRONG>NOTE:</STRONG>
<DD>For more information, see sla_AOPPA.
</DL>
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<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>
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