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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/node43.html | |
| download | calfuse-d54fe7c1f704a63824c5bfa0ece65245572e9b27.tar.gz | |
Initial commit
Diffstat (limited to 'src/slalib/sun67.htx/node43.html')
| -rw-r--r-- | src/slalib/sun67.htx/node43.html | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/slalib/sun67.htx/node43.html b/src/slalib/sun67.htx/node43.html new file mode 100644 index 0000000..8559153 --- /dev/null +++ b/src/slalib/sun67.htx/node43.html @@ -0,0 +1,229 @@ +<!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_DAFIN - Sexagesimal character string to angle</TITLE> +<META NAME="description" CONTENT="SLA_DAFIN - Sexagesimal character string to angle"> +<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="node44.html"> +<LINK REL="previous" HREF="node42.html"> +<LINK REL="up" HREF="node13.html"> +<LINK REL="next" HREF="node44.html"> +</HEAD> +<BODY > +<BR> <HR> +<A NAME="tex2html856" HREF="node44.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html854" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html848" HREF="node42.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="tex2html857" HREF="node44.html">SLA_DAT - TAI-UTC</A> +<BR> +<B>Up:</B> <A NAME="tex2html855" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html849" HREF="node42.html">SLA_DAF2R - Deg,Arcmin,Arcsec to Radians</A> +<BR> <HR> <P> +<P><!--End of Navigation Panel--> +<H2><A NAME="SECTION000430000000000000000">SLA_DAFIN - Sexagesimal character string to angle</A> +<A NAME="xref_SLA_DAFIN"> </A><A NAME="SLA_DAFIN"> </A> +</H2> + <DL> +<DT><STRONG>ACTION:</STRONG> +<DD>Decode a free-format sexagesimal string (degrees, arcminutes, +arcseconds) into a double precision floating point + number (radians). +<P> <DT><STRONG>CALL:</STRONG> +<DD><TT>CALL sla_DAFIN (STRING, NSTRT, DRESLT, JF)</TT> +<P> </DL> +<P> <DL> +<DT><STRONG>GIVEN:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>STRING</EM></TD> +<TH ALIGN="LEFT"><B>C*(*)</B></TH> +<TD ALIGN="LEFT" NOWRAP>string containing deg, arcmin, arcsec fields</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>NSTRT</EM></TD> +<TD ALIGN="LEFT"><B>I</B></TD> +<TD ALIGN="LEFT" NOWRAP>pointer to start of decode (beginning of STRING = 1)</TD> +</TR> +</TABLE></DL> +<P> <DL> +<DT><STRONG>RETURNED:</STRONG> +<DD> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>NSTRT</EM></TD> +<TH ALIGN="LEFT"><B>I</B></TH> +<TD ALIGN="LEFT" NOWRAP>advanced past the decoded angle</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>DRESLT</EM></TD> +<TD ALIGN="LEFT"><B>D</B></TD> +<TD ALIGN="LEFT" NOWRAP>angle in radians</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>JF</EM></TD> +<TD ALIGN="LEFT"><B>I</B></TD> +<TD ALIGN="LEFT" NOWRAP>status:</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD> +<TD ALIGN="LEFT"><B></B></TD> +<TD ALIGN="LEFT" NOWRAP> 0 = OK</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD> +<TD ALIGN="LEFT"><B></B></TD> +<TD ALIGN="LEFT" NOWRAP> +1 = default, DRESLT unchanged (note 2)</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD> +<TD ALIGN="LEFT"><B></B></TD> +<TD ALIGN="LEFT" NOWRAP> -1 = bad degrees (note 3)</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD> +<TD ALIGN="LEFT"><B></B></TD> +<TD ALIGN="LEFT" NOWRAP> -2 = bad arcminutes (note 3)</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD> +<TD ALIGN="LEFT"><B></B></TD> +<TD ALIGN="LEFT" NOWRAP> -3 = bad arcseconds (note 3)</TD> +</TR> +</TABLE></DL> +<P><DL> +<DT><STRONG>EXAMPLE</STRONG> +<DD>: <BR> +<BR> +<BR> +<TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TH ALIGN="LEFT"><I>argument</I></TH> +<TH ALIGN="LEFT"><I>before</I></TH> +<TH ALIGN="LEFT"><I>after</I></TH> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"> </TD> +<TD ALIGN="LEFT"> </TD> +<TD ALIGN="LEFT"> </TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">STRING</TD> +<TD ALIGN="LEFT">'<code>-57 17 44.806 12 34 56.7</code>'</TD> +<TD ALIGN="LEFT">unchanged</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">NSTRT</TD> +<TD ALIGN="LEFT">1</TD> +<TD ALIGN="LEFT">16 (<I>i.e.</I> pointing to 12...)</TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">RESLT</TD> +<TD ALIGN="LEFT">-</TD> +<TD ALIGN="LEFT">-1.00000<TT>D0</TT></TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">JF</TD> +<TD ALIGN="LEFT">-</TD> +<TD ALIGN="LEFT"> </TD> +</TR> +</TABLE> + <DT><DD> A further call to sla_DAFIN, without adjustment of NSTRT, will + decode the second angle, <IMG WIDTH="90" HEIGHT="18" ALIGN="BOTTOM" BORDER="0" + SRC="img4.gif" + ALT="$12^{\circ}\,34^{'}\,56^{''}.7$">.</DL> +<P> <DL> +<DT><STRONG>NOTES:</STRONG> +<DD><DL COMPACT> +<DT>1. +<DD>The first three ``fields'' in STRING are degrees, arcminutes, +arcseconds, separated by spaces or commas. The degrees field +may be signed, but not the others. The decoding is carried + out by the sla_DFLTIN routine and is free-format. + <DT>2. +<DD>Successive fields may be absent, defaulting to zero. For + zero status, the only combinations allowed are degrees alone, + degrees and arcminutes, and all three fields present. If all + three fields are omitted, a status of +1 is returned and DRESLT is + unchanged. In all other cases DRESLT is changed. + <DT>3. +<DD>Range checking: + <UL> +<LI> The degrees field is not range checked. However, it is + expected to be integral unless the other two fields are absent. +<LI> The arcminutes field is expected to be 0-59, and integral if + the arcseconds field is present. If the arcseconds field + is absent, the arcminutes is expected to be 0-59.9999... +<LI> The arcseconds field is expected to be 0-59.9999... +<LI> Decoding continues even when a check has failed. Under these + circumstances the field takes the supplied value, defaulting to + zero, and the result DRESLT is computed and returned. + </UL> + <DT>4. +<DD>Further fields after the three expected ones are not treated as + an error. The pointer NSTRT is left in the correct state for + further decoding with the present routine or with sla_DFLTIN + <I>etc</I>. See the example, above. + <DT>5. +<DD>If STRING contains hours, minutes, seconds instead of + degrees <I>etc</I>, + or if the required units are turns (or days) instead of radians, + the result DRESLT should be multiplied as follows: <BR> +<BR> +<BR> + <TABLE CELLPADDING=3> +<TR VALIGN="TOP"><TH ALIGN="LEFT"><I>for STRING</I></TH> +<TH ALIGN="LEFT"><I>to obtain</I></TH> +<TH ALIGN="LEFT"><I>multiply DRESLT by</I></TH> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"> </TD> +<TD ALIGN="LEFT"> </TD> +<TD ALIGN="LEFT"> </TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><IMG WIDTH="10" HEIGHT="14" ALIGN="BOTTOM" BORDER="0" + SRC="img5.gif" + ALT="${\circ}$"> ' ''</TD> +<TD ALIGN="LEFT">radians</TD> +<TD ALIGN="LEFT">1.0<TT>D0</TT></TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT"><IMG WIDTH="10" HEIGHT="14" ALIGN="BOTTOM" BORDER="0" + SRC="img5.gif" + ALT="${\circ}$"> ' ''</TD> +<TD ALIGN="LEFT">turns</TD> +<TD ALIGN="LEFT"><IMG WIDTH="227" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" + SRC="img6.gif" + ALT="$1/{2 \pi} = 0.1591549430918953358$"><TT>D0</TT></TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">h m s</TD> +<TD ALIGN="LEFT">radians</TD> +<TD ALIGN="LEFT">15.0<TT>D0</TT></TD> +</TR> +<TR VALIGN="TOP"><TD ALIGN="LEFT">h m s</TD> +<TD ALIGN="LEFT">days</TD> +<TD ALIGN="LEFT"><IMG WIDTH="235" HEIGHT="29" ALIGN="MIDDLE" BORDER="0" + SRC="img7.gif" + ALT="$15/{2\pi} = 2.3873241463784300365$"><TT>D0</TT></TD> +</TR> +</TABLE></DL></DL> +<BR> <HR> +<A NAME="tex2html856" HREF="node44.html"> +<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next_motif.gif"></A> +<A NAME="tex2html854" HREF="node13.html"> +<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up_motif.gif"></A> +<A NAME="tex2html848" HREF="node42.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="tex2html857" HREF="node44.html">SLA_DAT - TAI-UTC</A> +<BR> +<B>Up:</B> <A NAME="tex2html855" HREF="node13.html">SUBPROGRAM SPECIFICATIONS</A> +<BR> +<B> Previous:</B> <A NAME="tex2html849" HREF="node42.html">SLA_DAF2R - Deg,Arcmin,Arcsec to Radians</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> |