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diff --git a/src/slalib/sun67.htx/node217.html b/src/slalib/sun67.htx/node217.html new file mode 100644 index 0000000..b6fbe6c --- /dev/null +++ b/src/slalib/sun67.htx/node217.html @@ -0,0 +1,92 @@ +<!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>Timescales</TITLE> +<META NAME="description" CONTENT="Timescales"> +<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="node222.html"> +<LINK REL="previous" HREF="node216.html"> +<LINK REL="up" HREF="node197.html"> +<LINK REL="next" HREF="node218.html"> +</HEAD> +<BODY > +<BR> <HR> +<A NAME="tex2html2621" HREF="node218.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html2619" HREF="node197.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html2613" HREF="node216.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="tex2html2622" HREF="node218.html">Atomic Time: TAI</A> +<BR> +<B>Up:</B> <A NAME="tex2html2620" HREF="node197.html">EXPLANATION AND EXAMPLES</A> +<BR> +<B> Previous:</B> <A NAME="tex2html2614" HREF="node216.html">The Hipparcos Catalogue and the ICRS</A> +<BR> <HR> <P> +<P><!--End of Navigation Panel--> +<H2><A NAME="SECTION000515000000000000000"> +Timescales</A> +</H2> +SLALIB provides for conversion between several timescales, and involves +use of one or two others. The full list is as follows: +<UL> +<LI> TAI: International Atomic Time +<LI> UTC: Coordinated Universal Time +<LI> UT: Universal Time +<LI> GMST: Greenwich Mean Sidereal Time +<LI> LAST: Local Apparent Sidereal Time +<LI> TT: Terrestrial Time +<LI> TDB: Barycentric Dynamical Time. +</UL> +Three obsolete timescales should be mentioned here to avoid confusion. +<UL> +<LI> GMT: Greenwich Mean Time - can mean either UTC or UT. +<LI> ET: Ephemeris Time - more or less the same as either TT or TDB. +<LI> TDT: Terrestrial Dynamical Time - former name of TT. +</UL> +<BR><HR> +<!--Table of Child-Links--> +<A NAME="CHILD_LINKS"> </A> +<UL> +<LI><A NAME="tex2html2623" HREF="node218.html#SECTION000515100000000000000"> +Atomic Time: TAI</A> +<LI><A NAME="tex2html2624" HREF="node219.html#SECTION000515200000000000000"> +Universal Time: UTC, UT1</A> +<LI><A NAME="tex2html2625" HREF="node220.html#SECTION000515300000000000000"> +Sidereal Time: GMST, LAST</A> +<LI><A NAME="tex2html2626" HREF="node221.html#SECTION000515400000000000000"> +Dynamical Time: TT, TDB</A> +</UL> +<!--End of Table of Child-Links--> +<BR> <HR> +<A NAME="tex2html2621" HREF="node218.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html2619" HREF="node197.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html2613" HREF="node216.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="tex2html2622" HREF="node218.html">Atomic Time: TAI</A> +<BR> +<B>Up:</B> <A NAME="tex2html2620" HREF="node197.html">EXPLANATION AND EXAMPLES</A> +<BR> +<B> Previous:</B> <A NAME="tex2html2614" HREF="node216.html">The Hipparcos Catalogue and the ICRS</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> |