<!-- Creator : groff version 1.19.2 --> <!-- CreationDate: Tue Mar 8 16:22:43 2011 --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta name="Content-Style" content="text/css"> <style type="text/css"> p { margin-top: 0; margin-bottom: 0; } pre { margin-top: 0; margin-bottom: 0; } table { margin-top: 0; margin-bottom: 0; } </style> <title>X_UPDATE</title> </head> <body bgcolor="#ffffff"> <h1 align=center>X_UPDATE</h1> <a href="#NAME">NAME</a><br> <a href="#SYNOPSIS">SYNOPSIS</a><br> <a href="#DESCRIPTION">DESCRIPTION</a><br> <a href="#BEWARE">BEWARE</a><br> <a href="#SEE ALSO">SEE ALSO</a><br> <a href="#REFERENCES">REFERENCES</a><br> <hr> <a name="NAME"></a> <h2>NAME</h2> <p style="margin-left:11%; margin-top: 1em"><b>x_update</b> − Archiving of Cross-Over Information</p> <a name="SYNOPSIS"></a> <h2>SYNOPSIS</h2> <p style="margin-left:11%; margin-top: 1em"><b>x_update</b> <i>cross-overfile</i> [ <b>−X</b><i>xbase</i> ] [ <b>−L</b><i>legbase</i> ] [ <b>−V</b> ] [ <b>−W</b><i>max</i> ]</p> <a name="DESCRIPTION"></a> <h2>DESCRIPTION</h2> <p style="margin-left:11%; margin-top: 1em"><b>x_update</b> reads the ASCII file produced by <b><A HREF="x_over.html">x_over</A></b> and writes the information to the database files <i>xx_base.b</i> and <i>xx_legs.b</i> (unless other filenames are specified on the command line) using a compact, binary format. The options recognized are:</p> <table width="100%" border=0 rules="none" frame="void" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="11%"></td> <td width="3%"> <p style="margin-top: 1em" valign="top"><b>−X</b></p> </td> <td width="8%"></td> <td width="78%"> <p style="margin-top: 1em" valign="top">Indicate alternate <i>xx_base.b</i> file.</p></td> <tr valign="top" align="left"> <td width="11%"></td> <td width="3%"> <p style="margin-top: 1em" valign="top"><b>−L</b></p> </td> <td width="8%"></td> <td width="78%"> <p style="margin-top: 1em" valign="top">Indicate alternate <i>xx_legs.b</i> file.</p></td> <tr valign="top" align="left"> <td width="11%"></td> <td width="3%"> <p style="margin-top: 1em" valign="top"><b>−V</b></p> </td> <td width="8%"></td> <td width="78%"> <p style="margin-top: 1em" valign="top">Selects verbose mode, which will send progress reports to stderr [Default runs "silently"]. Reports the pair currently being processed.</p> </td> <tr valign="top" align="left"> <td width="11%"></td> <td width="3%"> <p style="margin-top: 1em" valign="top"><b>−W</b></p> </td> <td width="8%"></td> <td width="78%"> <p style="margin-top: 1em" valign="top">Prints a warning if the number of COEs generated by any pair of legs exceed <i>max</i>.</p> </td> </table> <a name="BEWARE"></a> <h2>BEWARE</h2> <p style="margin-left:11%; margin-top: 1em">For security reasons the <i>xx_legs.b</i> are first renamed to <i>xx_legs.b_old</i>, to prevent loss of information if a black-out or system crash should occur during writing of the new <i>xx_legs.b</i> file. It is recommended that the old file is left on the disk in case of other disasters. Note that <b>x_update</b> does not check if a pair of legs already exist in the <i>xx_base.b</i> file. It is the user’s responsibility to ensure that duplication of information does not occur. Should some pairs already in the database need to be re-examined, then run <b><A HREF="x_remove.html">x_remove</A></b> which will wipe out all traces of the specified cruises from the x_system data base files. Now we can pass the pairs that need to be redone through <b>x_over/x_update</b> again.</p> <a name="SEE ALSO"></a> <h2>SEE ALSO</h2> <p style="margin-left:11%; margin-top: 1em"><i><A HREF="GMT.html">GMT</A></i>(1), <i><A HREF="x_system.html">x_system</A></i>(1)</p> <a name="REFERENCES"></a> <h2>REFERENCES</h2> <p style="margin-left:11%; margin-top: 1em">Wessel, P. XOVER: A Cross-over Error Detector for Track Data, <i>Computers & Geosciences, 15</i>, 333-346.</p> <hr> </body> </html>