/usr/share/doc/gmt/html/man/x2sys_solve.html is in gmt-doc 4.5.11-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | <!-- Creator : groff version 1.19.2 -->
<!-- CreationDate: Tue Nov 5 09:45:52 2013 -->
<!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>X2SYS_SOLVE</title>
</head>
<body bgcolor="#ffffff">
<h1 align=center>X2SYS_SOLVE</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#OPTIONS">OPTIONS</a><br>
<a href="#EXAMPLES">EXAMPLES</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<a name="NAME"></a>
<h2>NAME</h2>
<p style="margin-left:11%; margin-top: 1em">x2sys_solve
− Determine systematic corrections from crossovers</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_solve
−C</b><i>column</i> <b>−T</b><i>TAG</i>
<b>−E</b><i>mode</i> [ <i>COE_list.d</i> ] [
<b>−V</b> ] [ <b>−W</b> ] [ <b>−Z</b> ] [
<b>−bi</b>[<b>s</b>|<b>S</b>|<b>d</b>|<b>D</b>[<i>ncol</i>]|<b>c</b>[<i>var1</i><b>/</b><i>...</i>]]
]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>x2sys_solve</b>
will use the supplied crossover information to solve for
systematic corrections that can then be applied per track to
improve data quality. Several systematic corrections can be
solved for using a least-squares approach. Note: Only one
data column can be processed at the time.</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>−T</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Specify the x2sys
<i>TAG</i> which tracks the attributes of this data
type.</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−C</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Specify which data
column you want to process. Needed for proper formatting of
the output correction table and must match the same option
used in <b><A HREF="x2sys_list.html">x2sys_list</A></b> when preparing the input data.</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−E</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">The correction type
you wish to model. Choose among the following functions
<i>f</i>(<i>p</i>), where <i>p</i> are the <i>m</i>
parameters per track that we will fit simultaneously using a
least squares approach:</p></td>
</table>
<p style="margin-left:22%;"><b>c</b> will fit
<i>f</i>(<i>p</i>) = <i>a</i> (a constant offset); records
must contain cruise ID1, ID2, COE. <b><br>
d</b> will fit <i>f</i>(<i>p</i>) = <i>a</i> + <i>b</i> *
<i>d</i> (linear drift; <i>d</i> is distance; records must
contain cruise ID1, ID2, d1, d2, COE. <b><br>
g</b> will fit <i>f</i>(<i>p</i>) = <i>a</i> + <i>b</i>
sin(y)^2 (1980-1930 gravity correction); records must
contain cruise ID1, ID2, latitude y, COE. <b><br>
h</b> will fit <i>f</i>(<i>p</i>) = <i>a</i> + <i>b</i>
cos(H) + <i>c</i> cos(2H) + <i>d</i> sin(H) + <i>e</i>
sin(2H) (magnetic heading correction); records must contain
cruise ID1, ID2, heading H, COE. <b><br>
s</b> will fit <i>f</i>(<i>p</i>) = <i>a</i> * z (a unit
scale correction); records must contain cruise ID1, ID2, z1,
z2. <b><br>
t</b> will fit <i>f</i>(<i>p</i>) = <i>a</i> + <i>b</i> *
(<i>t - t0</i>) (linear drift; <i>t0</i> is the start time
of the track); records must contain cruise ID1, ID2, t1-t0,
t2-t0, COE.</p>
<a name="OPTIONS"></a>
<h2>OPTIONS</h2>
<p style="margin-left:11%; margin-top: 1em">No space
between the option flag and the associated arguments.
<i><br>
COE_list.d</i></p>
<p style="margin-left:22%;">Name of file with the required
crossover columns as produced by <b><A HREF="x2sys_list.html">x2sys_list</A></b>. NOTE: If
<b>−bi</b> is used then the first two columns are
expected to hold the integer track IDs; otherwise we expect
those columns to hold the text string names of the two
tracks.</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="4%">
<p style="margin-top: 1em" valign="top"><b>−V</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects verbose
mode, which will send progress reports to stderr [Default
runs "silently"].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−W</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Means that each
input records has an extra column with the composite weight
for each crossover record. These are used to obtain a
weighted least squares solution [no weights].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−Z</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">For
<b>−Ed</b> and <b>−Et</b>, determine the
earliest time or shortest distance for each track, then use
these values as the local origin for time duration or
distance calculations. The local origin is then included in
the correction table [Default uses 0].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="4%">
<p style="margin-top: 1em" valign="top"><b>−bi</b></p> </td>
<td width="7%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Selects binary
input. Append <b>s</b> for single precision [Default is
<b>d</b> (double)]. Uppercase <b>S</b> or <b>D</b> will
force byte-swapping. Optionally, append <i>ncol</i>, the
number of columns in your binary input file if it exceeds
the columns needed by the program. Or append <b>c</b> if the
input file is netCDF. Optionally, append
<i>var1</i><b>/</b><i>var2</i><b>/</b><i>...</i> to specify
the variables to be read.</p></td>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">To fit a simple
bias offset to faa for all tracks under the MGD77 tag,
try</p>
<p style="margin-left:11%; margin-top: 1em"><b><A HREF="x2sys_list.html">x2sys_list</A></b>
COE_data.txt <b>−V −T</b> MGD77 <b>−C</b>
faa <b>−F</b> nc > faa_coe.txt <b><br>
x2sys_solve</b> faa_coe.txt <b>−V −T</b> MGD77
<b>−C</b> faa <b>−E</b> c > coe_table.txt</p>
<p style="margin-left:11%; margin-top: 1em">To fit a faa
linear drift with time instead, try</p>
<p style="margin-left:11%; margin-top: 1em"><b><A HREF="x2sys_list.html">x2sys_list</A></b>
COE_data.txt <b>−V −T</b> MGD77 <b>−C</b>
faa <b>−F</b> nTc > faa_coe.txt <b><br>
x2sys_solve</b> faa_coe.txt <b>−V −T</b> MGD77
<b>−C</b> faa <b>−E</b> t > coe_table.txt</p>
<p style="margin-left:11%; margin-top: 1em">To estimate
heading corrections based on magnetic crossovers associated
with the tag MGD77 from the file COE_data.txt, try</p>
<p style="margin-left:11%; margin-top: 1em"><b><A HREF="x2sys_list.html">x2sys_list</A></b>
COE_data.txt <b>−V −T</b> MGD77 <b>−C</b>
mag <b>−F</b> nhc > mag_coe.txt <b><br>
x2sys_solve</b> mag_coe.txt <b>−V −T</b> MGD77
<b>−C</b> mag <b>−E</b> h > coe_table.txt</p>
<p style="margin-left:11%; margin-top: 1em">To estimate
unit scale corrections based on bathymetry crossovers,
try</p>
<p style="margin-left:11%; margin-top: 1em"><b><A HREF="x2sys_list.html">x2sys_list</A></b>
COE_data.txt <b>−V −T</b> MGD77 <b>−C</b>
depth <b>−F</b> nz > depth_coe.txt <b><br>
x2sys_solve</b> depth_coe.txt <b>−V −T</b> MGD77
<b>−C</b> depth <b>−E</b> s >
coe_table.txt</p>
<a name="SEE ALSO"></a>
<h2>SEE ALSO</h2>
<p style="margin-left:11%; margin-top: 1em"><i><A HREF="x2sys_binlist.html">x2sys_binlist</A></i>(1),
<i><A HREF="x2sys_cross.html">x2sys_cross</A></i>(1), <i><A HREF="x2sys_datalist.html">x2sys_datalist</A></i>(1),
<i><A HREF="x2sys_get.html">x2sys_get</A></i>(1), <i><A HREF="x2sys_init.html">x2sys_init</A></i>(1),
<i><A HREF="x2sys_list.html">x2sys_list</A></i>(1), <i><A HREF="x2sys_put.html">x2sys_put</A></i>(1),
<i><A HREF="x2sys_report.html">x2sys_report</A></i>(1)</p>
<hr>
</body>
</html>
|