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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/node86.html | |
| download | calfuse-d54fe7c1f704a63824c5bfa0ece65245572e9b27.tar.gz | |
Initial commit
Diffstat (limited to 'src/slalib/sun67.htx/node86.html')
| -rw-r--r-- | src/slalib/sun67.htx/node86.html | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/slalib/sun67.htx/node86.html b/src/slalib/sun67.htx/node86.html new file mode 100644 index 0000000..6507524 --- /dev/null +++ b/src/slalib/sun67.htx/node86.html @@ -0,0 +1,124 @@ +<!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_EARTH - Approx Earth Pos/Vel</TITLE> +<META NAME="description" CONTENT="SLA_EARTH - Approx Earth Pos/Vel"> +<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="node87.html"> +<LINK REL="previous" HREF="node85.html"> +<LINK REL="up" HREF="node13.html"> +<LINK REL="next" HREF="node87.html"> +</HEAD> +<BODY > +<BR> <HR> +<A NAME="tex2html1286" HREF="node87.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html1284" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html1278" HREF="node85.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="tex2html1287" HREF="node87.html">SLA_ECLEQ - Ecliptic to Equatorial</A> +<BR> +<B>Up:</B> <A NAME="tex2html1285" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html1279" HREF="node85.html">SLA_E2H - to Az,El</A> +<BR> <HR> <P> +<P><!--End of Navigation Panel--> +<H2><A NAME="SECTION000473000000000000000">SLA_EARTH - Approx Earth Pos/Vel</A> +<A NAME="xref_SLA_EARTH"> </A><A NAME="SLA_EARTH"> </A> +</H2> + <DL> +<DT><STRONG>ACTION:</STRONG> +<DD>Approximate heliocentric position and velocity of the Earth +(single precision). +<P> <DT><STRONG>CALL:</STRONG> +<DD><TT>CALL sla_EARTH (IY, ID, FD, PV)</TT> +<P> </DL> +<P> <DL> +<DT><STRONG>GIVEN:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>IY</EM></TD> +<TH ALIGN="LEFT"><B>I</B></TH> +<TD ALIGN="LEFT" NOWRAP>year</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>ID</EM></TD> +<TD ALIGN="LEFT"><B>I</B></TD> +<TD ALIGN="LEFT" NOWRAP>day in year (1 = Jan 1st)</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>FD</EM></TD> +<TD ALIGN="LEFT"><B>R</B></TD> +<TD ALIGN="LEFT" NOWRAP>fraction of day</TD> +</TR> +</TABLE></DL> +<P> <DL> +<DT><STRONG>RETURNED:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>PV</EM></TD> +<TH ALIGN="LEFT"><B>R(6)</B></TH> +<TD ALIGN="LEFT" NOWRAP>Earth <IMG WIDTH="106" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" + SRC="img51.gif" + ALT="$[\,x,y,z,\dot{x},\dot{y},\dot{z}\,]$"> (AU, AU s<SUP>-1</SUP>)</TD> +</TR> +</TABLE></DL> +<P> <DL> +<DT><STRONG>NOTES:</STRONG> +<DD><DL COMPACT> +<DT>1. +<DD>The date and time is TDB (loosely ET) in a Julian calendar +which has been aligned to the ordinary Gregorian +calendar for the interval 1900 March 1 to 2100 February 28. + The year and day can be obtained by calling sla_CALYD or + sla_CLYD. + <DT>2. +<DD>The Earth heliocentric 6-vector is referred to the + FK4 mean equator and equinox of date. + <DT>3. +<DD>Maximum/RMS errors 1950-2050: + <UL> +<LI> 13/5 <IMG WIDTH="48" HEIGHT="31" ALIGN="MIDDLE" BORDER="0" + SRC="img93.gif" + ALT="$\times10^{-5}$"> AU = 19200/7600 km in position +<LI> 47/26 <IMG WIDTH="55" HEIGHT="31" ALIGN="MIDDLE" BORDER="0" + SRC="img94.gif" + ALT="$\times10^{-10}$"> AU s<SUP>-1</SUP> = + 0.0070/0.0039 km s<SUP>-1</SUP> in speed + </UL> + <DT>4. +<DD>More accurate results are obtainable with the routine sla_EVP. + </DL></DL> +<BR> <HR> +<A NAME="tex2html1286" HREF="node87.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html1284" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html1278" HREF="node85.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="tex2html1287" HREF="node87.html">SLA_ECLEQ - Ecliptic to Equatorial</A> +<BR> +<B>Up:</B> <A NAME="tex2html1285" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html1279" HREF="node85.html">SLA_E2H - to Az,El</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> |