---
name: "UGsmooth"
section: "1"
platform: "linux"
package: "flightgear"
version: "1:2020.3.19+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/UGsmooth"
---

# UGsmooth(1)

send UGear-formatted GPS data to a FlightGear instance

## NAME

UGsmooth - send UGear-formatted GPS data to a FlightGear instance

## SYNOPSIS

**UGsmooth** **--help**\
     \| **--infile** *infile\_name* \[*options*\]...\
     \| **--flight** *flight\_dir* \[*options*\]...\
     \| **--serial** *dev\_name* **--outfile** *outfile\_name* \[*options*\]...

## DESCRIPTION

**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.

## OPTIONS

- **--help**

  Display usage information and exit.

- **--infile** *infile\_name*

  Read GPS data from *infile\_name*.

- **--flight** *flight\_dir*

  Read GPS data from the flight directory named *flight\_dir*.

- **--serial** *dev\_name*

  Read GPS data from the serial device named *dev\_name*.

- **--outfile** *outfile\_name*

  Save the data retrieved from the device to *outfile\_name*.

- **--hertz** *frequency*

  Specify the frequency to use for sending data to the FlightGear instance. By default, events are sent at a frequency of **60** Hz.

- **--host** *hostname*

  Send the data to the FlightGear instance running on *hostname*.

  If **--host** is not specified, the default is to send the data to **localhost**.

- **--broadcast**

  Send flight data model and control data as broadcast packets.

- **--opengc-port** *port*

  Set the port OpenGC data should be sent to. By default, data is sent to port **6000**.

- **--fdm-port** *port*

  Set the port flight data model data should be sent to. By default, data is sent to port **5505**.

- **--ctrls-port** *port*

  Set the port control data should be sent to. By default, data is sent to port **5506**.

- **--groundtrack-heading**

  Calculate the aircraft heading from the GPS velocity instead of using the raw heading recorded by the device.

- **--ground-speed**

  Calculate the ground speed from the GPS velocity instead of using the raw speed recorded by the device.

- **--estimate-control-deflections**

  Estimate control deflections from the angular velocities instead of using the raw deflections recorded by the device.

- **--altitude-offset** *meters*

  Add the specified offset (in meters) to the altitude sent to FlightGear.

- **--skip-seconds** *seconds*

  Do not transmit the first *seconds* seconds of data.

  This option is ignored when reading GPS data from a serial device.

- **--no-real-time**

  Do not update the elapsed time.

- **--ignore-checksum**

  Do not discard data with invalid checksums.

  This option is ignored when reading GPS data from a flight directory.

- **--sg-swap**

  Activate the special double swap logic for the (non-standard) stargate double format.

## EXIT STATUS

**UGsmooth** exits with **0** on success, with **-1** if the syntax of the command-line arguments is wrong or an error occurs.

## SEE ALSO

[**fgfs**(1)](/fgfs/1.md), [**GPSsmooth**(1)](/GPSsmooth/1.md), [**MIDGsmooth**(1)](/MIDGsmooth/1.md)