<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<!--Converted with LaTeX2HTML 98.1p1 release (March 2nd, 1998)
originally 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 Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>MOUNTING='ALTAZ'</TITLE>
<META NAME="description" CONTENT="MOUNTING='ALTAZ'">
<META NAME="keywords" CONTENT="vol2">
<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="vol2.css">
<LINK REL="previous" HREF="node590.html">
<LINK REL="up" HREF="node581.html">
<LINK REL="next" HREF="node602.html">
</HEAD>
<BODY >
<!--Navigation Panel-->
<A NAME="tex2html9018"
HREF="node602.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next"
SRC="icons.gif/next_motif.gif"></A>
<A NAME="tex2html9015"
HREF="node581.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up"
SRC="icons.gif/up_motif.gif"></A>
<A NAME="tex2html9011"
HREF="node600.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous"
SRC="icons.gif/previous_motif.gif"></A>
<A NAME="tex2html9017"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents"
SRC="icons.gif/contents_motif.gif"></A>
<BR>
<B> Next:</B> <A NAME="tex2html9019"
HREF="node602.html">Column label: AZI</A>
<B> Up:</B> <A NAME="tex2html9016"
HREF="node581.html">Horizon obstructions</A>
<B> Previous:</B> <A NAME="tex2html9012"
HREF="node600.html">Special remarks on German</A>
<BR>
<BR>
<!--End of Navigation Panel-->
<H2><A NAME="SECTION003245000000000000000">
MOUNTING=<TT>'ALTAZ'</TT></A>
</H2>
The independent variable (i.e., the reference column of the table) is
labelled AZI, and contains the azimuth in degrees.
Note that astronomical azimuth is normally measured positive
<I>eastward</I> from the north point on the horizon.
The table entries are the altitudes of the
two limits, measured in decimal degrees.
<P>
It should be obvious in this table that the ``moonlight'' limit is
always less than the ``observing'' limit.
As azimuth runs from
<IMG
WIDTH="26" HEIGHT="22" ALIGN="BOTTOM" BORDER="0"
SRC="img1155.gif"
ALT="$0^{\circ}$">to
<!-- MATH: $360^{\circ}$ -->
<IMG
WIDTH="48" HEIGHT="22" ALIGN="BOTTOM" BORDER="0"
SRC="img1156.gif"
ALT="$360^{\circ}$">completely around the horizon, there is no need to separate halves of the sky.
<P>
Table <A HREF="node601.html#tbl:altaz-ex">I.8</A> shows the layout for this form.
Each column is described in detail below (see Table <A HREF="node604.html#tbl:altaz-label">I.9</A>).
<P>
<BR>
<DIV ALIGN="CENTER"><A NAME="30284"> </A>
<TABLE>
<CAPTION><STRONG>Table:</STRONG>
Example of table contents for alt-azimuth mountings</CAPTION>
<TR><TD>
<DIV ALIGN="CENTER">
<TABLE CELLPADDING=3 BORDER="1" ALIGN="CENTER">
<TR><TD ALIGN="RIGHT"><TT> AZI</TT></TD>
<TD ALIGN="CENTER"><TT> OBSALT</TT></TD>
<TD ALIGN="CENTER"><TT> MOONALT</TT></TD>
</TR>
<TR><TD ALIGN="RIGHT">0.</TD>
<TD ALIGN="CENTER">5.4</TD>
<TD ALIGN="CENTER">4.5</TD>
</TR>
<TR><TD ALIGN="RIGHT">+10.</TD>
<TD ALIGN="CENTER">0.3</TD>
<TD ALIGN="CENTER">0.1</TD>
</TR>
<TR><TD ALIGN="RIGHT">+20.</TD>
<TD ALIGN="CENTER">3.6</TD>
<TD ALIGN="CENTER">2.7</TD>
</TR>
<TR><TD ALIGN="RIGHT">+30.</TD>
<TD ALIGN="CENTER">5.4</TD>
<TD ALIGN="CENTER">4.5</TD>
</TR>
</TABLE></DIV>
<A NAME="tbl:altaz-ex"> </A></TD></TR>
</TABLE>
</DIV>
<BR>
<P>
<BR><HR>
<!--Table of Child-Links-->
<A NAME="CHILD_LINKS"> </A>
<UL>
<LI><A NAME="tex2html9020"
HREF="node602.html">Column label: AZI</A>
<LI><A NAME="tex2html9021"
HREF="node603.html">Column label: OBSALT</A>
<LI><A NAME="tex2html9022"
HREF="node604.html">Column label: MOONALT</A>
</UL>
<!--End of Table of Child-Links-->
<BR><HR>
<ADDRESS>
<I>Petra Nass</I>
<BR><I>1999-06-15</I>
</ADDRESS>
</BODY>
</HTML>
