.\" Copyright (C) 2017 Alessandro Menti
.\"
.\" This program is free software; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License
.\" as published by the Free Software Foundation; either version 2
.\" of the License, or (at your option) any later version.
.\"
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
.\" GNU General Public License for more details.
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.\" along with this program; if not, write to the Free Software
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.TH UGSMOOTH 1 2017-06-04 FlightGear "FlightGear man pages"
.SH NAME
UGsmooth \- send UGear-formatted GPS data to a FlightGear instance
.SH SYNOPSIS
\fBUGsmooth\fR \fB\-\-help\fR
    | \fB\-\-infile\fR \fIinfile_name\fR [\fIoptions\fR]...
    | \fB\-\-flight\fR \fIflight_dir\fR [\fIoptions\fR]...
    | \fB\-\-serial\fR \fIdev_name\fR \fB\-\-outfile\fR \fIoutfile_name\fR [\fIoptions\fR]...
.SH DESCRIPTION
.B UGsmooth
is a utility that reads GPS data in UGear format from a text file, a directory
containing flight data or from a device connected to the serial port, parses it
and sends it to a FlightGear instance for replaying.
.SH OPTIONS
.TP
\fB\-\-help\fR
Display usage information and exit.
.TP
\fB\-\-infile\fR \fIinfile_name\fR
Read GPS data from \fIfilename\fR.
.TP
\fB\-\-flight\fR \fIflight_dir\fR
Read GPS data from the flight directory named \fIflight_dir\fR.
.TP
\fB\-\-serial\fR \fIdev_name\fR
Read GPS data from the serial device named \fIdev_name\fR.
.TP
\fB\-\-outfile\fR \fIoutfile_name\fR
Save the data retrieved from the device to \fIoutfile_name\fR.
.TP
\fB\-\-hertz\fR \fIfrequency\fR
Specify the frequency to use for sending data to the FlightGear instance.
By default, events are sent at a frequency of \fB60\fR Hz.
.TP
\fB\-\-host\fR \fIhostname\fR
Send the data to the FlightGear instance running on \fIhostname\fR.

If \fB\-\-host\fR is not specified, the default is to send the data to
\fBlocalhost\fR.
.TP
\fB\-\-broadcast\fR
Send flight data model and control data as broadcast packets.
.TP
\fB\-\-opengc\-port\fR \fIport\fR
Set the port OpenGC data should be sent to. By default, data is sent to port
\fB6000\fR.
.TP
\fB\-\-fdm\-port\fR \fIport\fR
Set the port flight data model data should be sent to. By default, data is sent
to port \fB5505\fR.
.TP
\fB\-\-ctrls\-port\fR \fIport\fR
Set the port control data should be sent to. By default, data is sent to port
\fB5506\fR.
.TP
\fB\-\-groundtrack\-heading\fR
Calculate the aircraft heading from the GPS velocity instead of using the raw
heading recorded by the device.
.TP
\fB\-\-ground\-speed\fR
Calculate the ground speed from the GPS velocity instead of using the raw speed
recorded by the device.
.TP
\fB\-\-estimate\-control\-deflections\fR
Estimate control deflections from the angular velocities instead of using the
raw deflections recorded by the device.
.TP
\fB\-\-altitude\-offset\fR \fImeters\fR
Add the specified offset (in meters) to the altitude sent to FlightGear.
.TP
\fB\-\-skip\-seconds\fR \fIseconds\fR
Do not transmit the first \fIseconds\fR seconds of data.

This option is ignored when reading GPS data from a serial device.
.TP
\fB\-\-no\-real\-time\fR
Do not update the elapsed time.
.TP
\fB\-\-ignore\-checksum\fR
Do not discard data with invalid checksums.

This option is ignored when reading GPS data from a flight directory.
.TP
\fB\-\-sg\-swap\fR
Activate the special double swap logic for the (non-standard) stargate double
format.
.SH "EXIT STATUS"
.B UGsmooth
exits with
.B 0
on success, with
.B \-1
if the syntax of the command-line arguments is wrong or an error occurs.
.SH "SEE ALSO"
.BR fgfs (1),
.BR GPSsmooth (1),
.BR MIDGsmooth (1)