<!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>Column label: TUBETYPE</TITLE> <META NAME="description" CONTENT="Column label: TUBETYPE"> <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="next" HREF="node576.html"> <LINK REL="previous" HREF="node574.html"> <LINK REL="up" HREF="node569.html"> <LINK REL="next" HREF="node576.html"> </HEAD> <BODY > <!--Navigation Panel--> <A NAME="tex2html8702" HREF="node576.html"> <IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="icons.gif/next_motif.gif"></A> <A NAME="tex2html8699" HREF="node569.html"> <IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="icons.gif/up_motif.gif"></A> <A NAME="tex2html8693" HREF="node574.html"> <IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="icons.gif/previous_motif.gif"></A> <A NAME="tex2html8701" 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="tex2html8703" HREF="node576.html">Column label: TUBEDIAM</A> <B> Up:</B> <A NAME="tex2html8700" HREF="node569.html">Permanent telescope parameters</A> <B> Previous:</B> <A NAME="tex2html8694" HREF="node574.html">Column label: HEIGHT</A> <BR> <BR> <!--End of Navigation Panel--> <H2><A NAME="SECTION003236000000000000000"> Column label: TUBETYPE</A> </H2> <P> This is a string, either '<TT>OPEN</TT>' or '<TT>CLOSED</TT>'. (Only the first letter is actually used.) Use '<TT>OPEN</TT>' if the tube is an open framework, and '<TT>CLOSED</TT>' if it is an opaque cylinder. If (as in some telescopes) the part near the declination axis is closed, but the front end of the tube is open, use '<TT>OPEN</TT>'. This information is needed to determine when the Moon can shine directly on the objective. <P> If the telescope is a refractor used with<I>out</I> a dewcap, use '<TT>OPEN</TT>'. A refractor used <I>with</I> a dewcap should be marked '<TT>CLOSED</TT>'; the dewcap information will be used in the TUBEDIAM and TUBELEN columns (see below). <P> <BR><HR> <ADDRESS> <I>Petra Nass</I> <BR><I>1999-06-15</I> </ADDRESS> </BODY> </HTML>
