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<title>ROTCONVERTER</title>
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<h1 align=center>ROTCONVERTER</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">rotconverter
− Manipulate finite and stage rotations</p>
<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
[ <b>+</b>|<b>-</b> ] <i>rotA</i> [ <b>+</b>|<b>-</b>
<i>rotB</i> ] [ <b>+</b>|<b>-</b> <i>rotC</i> ] ... [
<b>−C</b>[<b>a</b>|<b>t</b>]] [ <b>−D</b> ] [
<b>−E</b>[<i>fact</i>] ] [
<b>−F</b><i>in</i>/<i>out</i> ] [ <b>−N</b> ] [
<b>−S</b> ] [ <b>−T</b> ] [ <b>−V</b>
]</p>
<a name="DESCRIPTION"></a>
<h2>DESCRIPTION</h2>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
reads one or more plate motion models (rotations) stored in
the given files. If more than one plate motion model is
given we will add or subtract them in the order they were
listed. The minus sign means we should first transpose the
rotation and then add it to the previous rotation. The input
files must all be of the same type (stage poles or finite
rotations) which may differ from the desired output format;
see <b>−F</b>. If a file cannot be opened we will
attempt to decode the file name as a single rotation whose
parameters are separated by slashes.</p>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="8%"></td>
<td width="7%"></td>
<td width="85%">
<p valign="top">No space between the option flag and the
associated arguments. Use upper case for the option flags
and lower case for modifiers.</p></td>
</table>
<table width="100%" border=0 rules="none" frame="void"
cellspacing="0" cellpadding="0">
<tr valign="top" align="left">
<td width="11%"></td>
<td width="6%">
<p style="margin-top: 1em" valign="top"><i>rotX</i></p></td>
<td width="5%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Name of a file with
a plate motion model. Separate several files with desired
operator (+ or -). The very first file may also have a
leading minus to imply a transpose. If any of the specified
rotation models cannot be opened as a file, we will try to
decode the file name as
<i>lon/lat/tstart</i>[<i>/tstop</i>]/<i>angle</i> for a
single rotation given on the command line. The <i>tstop</i>
argument is required for stage poles only. For a single
finite rotation without any time information, give
<i>lon/lat/angle</i> only.</p></td>
</table>
<a name="OPTIONS"></a>
<h2>OPTIONS</h2>
<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>−C</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Write out a column
header record identifying the various columns [Default is no
header record]. Append <b>a</b> to indicate opening angles
and <b>t</b> to indicate opening rates [Default].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−D</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Report longitudes
use the -180/+180 range [Default is 0/360].</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">Scale opening
angles by <i>fact</i> on output. Requires stage pole output
(see <b>−F</b>).</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−F</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Specify both the
input and output format for rotations. The <i>in</i> and
<i>out</i> flags must be either <b>f</b> or <b>s</b> for
finite or stage rotations, respectively. Note that both must
be specified if <b>−F</b> is set [Default is
<b>−Fff</b> (both input and output are finite
rotations)].</p> </td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−N</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Place all output
poles in the northern hemisphere [Default reports positive
rotation angles].</p></td>
<tr valign="top" align="left">
<td width="11%"></td>
<td width="3%">
<p style="margin-top: 1em" valign="top"><b>−S</b></p> </td>
<td width="8%"></td>
<td width="78%">
<p style="margin-top: 1em" valign="top">Place all output
poles in the southern hemisphere [Default reports positive
rotation angles].</p></td>
<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">Transpose the final
result, i.e., change the sign of the rotation angles.</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"]. Report statistics of extracted
rotations.</p> </td>
</table>
<a name="EXAMPLES"></a>
<h2>EXAMPLES</h2>
<p style="margin-left:11%; margin-top: 1em">To convert the
finite rotations in the file model_finite.APM to stage
poles, run</p>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
model_finite.APM <b>−Ffs</b> > model_stages.APM</p>
<p style="margin-left:11%; margin-top: 1em">To obtain Nazca
motion relative to Pacific hotspots by adding the motion of
Nazca relative to a fixed Pacific to the Pacific-Hotspot
reference model DC85_stages.d, and report the result as
finite reconstruction poles in the northern hemisphere,
try</p>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
DC85_stages.APM + Pac_Naz_stages.RPM <b>−N
−Fsf</b> > Naz_HS_finite.APM</p>
<p style="margin-left:11%; margin-top: 1em">To add the
final rotations ROT(150.1, 70.5, -20.3) and ROT (145.0,
40.0, 11.4), try</p>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
150.1/70.5/-20.3 + 145/40/11.4</p>
<p style="margin-left:11%; margin-top: 1em">which prints
out 157.32, -80.44, 11.97.</p>
<p style="margin-left:11%; margin-top: 1em">To make stage
rotations suitable for generating flowlines (fracture zones)
from a model of relative plate motions PL1-PL2.RPM, assuming
symmetric spreading,, try</p>
<p style="margin-left:11%; margin-top: 1em"><b>rotconverter</b>
PL1-PL2.RPM <b>−E −Ffs</b> > PL1-PL2_half.RPM
<b><br>
rotconverter</b> - PL1-PL2.RPM <b>−E −Ffs</b>
> PL2-PL1_half.RPM</p>
<a name="SEE ALSO"></a>
<h2>SEE ALSO</h2>
<p style="margin-left:11%; margin-top: 1em"><i><A HREF="backtracker.html">backtracker</A></i>(1),
<i><A HREF="grdrotater.html">grdrotater</A></i>(1), <i><A HREF="grdspotter.html">grdspotter</A></i>(1),
<i><A HREF="hotspotter.html">hotspotter</A></i>(1), <i><A HREF="originator.html">originator</A></i>(1)</p>
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