/usr/share/doc/libstarlink-pal-doc/node65.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<!--Converted with LaTeX2HTML 2008 (1.71)
original version by:  Nikos Drakos, CBLU, University of Leeds
* revised and updated by:  Marcus Hennecke, Ross Moore, Herb Swan
* with significant contributions from:
  Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>palRdplan palRdplan
- Approximate topocentric apparent RA,Dec of a planet
</TITLE>
<META NAME="description" CONTENT="palRdplan palRdplan
- Approximate topocentric apparent RA,Dec of a planet
">
<META NAME="keywords" CONTENT="sun267">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">

<META NAME="Generator" CONTENT="LaTeX2HTML v2008">
<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css">

<LINK REL="STYLESHEET" HREF="sun267.css">

<LINK REL="next" HREF="node66.html">
<LINK REL="previous" HREF="node64.html">
<LINK REL="up" HREF="node4.html">
<LINK REL="next" HREF="node66.html">
</HEAD>

<BODY >

<DIV CLASS="navigation"><!--Navigation Panel-->
<A NAME="tex2html793"
  HREF="node66.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
 SRC="/usr/share/latex2html/icons/next.png"></A> 
<A NAME="tex2html791"
  HREF="node4.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
 SRC="/usr/share/latex2html/icons/up.png"></A> 
<A NAME="tex2html785"
  HREF="node64.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
 SRC="/usr/share/latex2html/icons/prev.png"></A>   
<BR>
<B> Next:</B> <A NAME="tex2html794"
  HREF="node66.html">palRverot palRverot - Velocity</A>
<B> Up:</B> <A NAME="tex2html792"
  HREF="node4.html">Function Descriptions</A>
<B> Previous:</B> <A NAME="tex2html786"
  HREF="node64.html">palPvobs palPvobs - Position</A>
<BR>
<BR></DIV>
<!--End of Navigation Panel-->

<H2><A NAME="SECTION000461000000000000000"></A><A NAME="____palRdplan_"></A>
<BR>
palRdplan

   palRdplan
-   Approximate topocentric apparent RA,Dec of a planet

</H2>
      <DL>
<DT><STRONG>Description:</STRONG></DT>
<DD><DL>
<DD>Approximate topocentric apparent RA,Dec of a planet, and its
      angular diameter.

</DD>
</DL>
      
<BR>   
   
</DD>
<DT><STRONG>Invocation:</STRONG></DT>
<DD><DL>
<DD><TT>      void palRdplan( double date, int np, double elong, double phi,
                      double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> ra, double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> dec, double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> diam );
   </TT>
      
</DD>
</DL>
      
<BR>

</DD>
<DT><STRONG>Arguments:</STRONG></DT>
<DD>
<BR>      <DL>
<DT><STRONG>
         date = double (Given)
      </STRONG></DT>
<DD>
         MJD of observation (JD-2400000.5) in TDB. For all practical
         purposes TT can be used instead of TDB, and for many applications
         UT will do (except for the Moon).
      
      
</DD>
<DT><STRONG>
         np = int (Given)
      </STRONG></DT>
<DD>
         Planet: 1 = Mercury
                 2 = Venus
                 3 = Moon
                 4 = Mars
                 5 = Jupiter
                 6 = Saturn
                 7 = Uranus
                 8 = Neptune
              else = Sun
      
      
</DD>
<DT><STRONG>
         elong = double (Given)
      </STRONG></DT>
<DD>
         Observer<TT>'</TT>s east longitude (radians)
      
      
</DD>
<DT><STRONG>
         phi = double (Given)
      </STRONG></DT>
<DD>
         Observer<TT>'</TT>s geodetic latitude (radians)
      
      
</DD>
<DT><STRONG>
         ra = double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> (Returned)
      </STRONG></DT>
<DD>
         RA (topocentric apparent, radians)
      
      
</DD>
<DT><STRONG>
         dec = double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> (Returned)
      </STRONG></DT>
<DD>
         Dec (topocentric apparent, radians)
      
      
</DD>
<DT><STRONG>
         diam = double <SPAN CLASS="MATH"><IMG
 WIDTH="13" HEIGHT="18" ALIGN="BOTTOM" BORDER="0"
 SRC="img1.png"
 ALT="$*$"></SPAN> (Returned)
      </STRONG></DT>
<DD>
         Angular diameter (equatorial, radians)
      

</DD>
</DL>
      
<BR>   
   
</DD>
<DT><STRONG>Notes:</STRONG></DT>
<DD><UL>
<LI>Unlike with slaRdplan, Pluto is not supported.

<P>
</LI>
<LI>The longitude and latitude allow correction for geocentric
           parallax.  This is a major effect for the Moon, but in the
           context of the limited accuracy of the present routine its
           effect on planetary positions is small (negligible for the
           outer planets).  Geocentric positions can be generated by
           appropriate use of the routines palDmoon and iauPlan94.

</LI>
</UL>
      
<BR>

</DD>
</DL>
<DIV CLASS="navigation"><HR>
<!--Navigation Panel-->
<A NAME="tex2html793"
  HREF="node66.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
 SRC="/usr/share/latex2html/icons/next.png"></A> 
<A NAME="tex2html791"
  HREF="node4.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
 SRC="/usr/share/latex2html/icons/up.png"></A> 
<A NAME="tex2html785"
  HREF="node64.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
 SRC="/usr/share/latex2html/icons/prev.png"></A>   
<BR>
<B> Next:</B> <A NAME="tex2html794"
  HREF="node66.html">palRverot palRverot - Velocity</A>
<B> Up:</B> <A NAME="tex2html792"
  HREF="node4.html">Function Descriptions</A>
<B> Previous:</B> <A NAME="tex2html786"
  HREF="node64.html">palPvobs palPvobs - Position</A></DIV>
<!--End of Navigation Panel-->

</BODY>
</HTML>
libstarlink-pal-doc 0.5.0-4 / usr / share / doc / libstarlink-pal-doc / node65.html
