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Chapter 3. TeleGPS Application
The TeleGPS application provides a graphical user interface for interacting with the Altus Metrum
product family. TeleGPS can monitor telemetry data, configure devices and many other tasks. The
primary interface window is for displaying data received over the telemetry link. There are additional
tasks available from the main window menu bar.
3.1. Telemetry Monitoring
This is the window brought up when you start the application. If you have a TeleDongle device
connected to the computer, it will automatically be selected for telemetry monitoring
All telemetry data received are automatically recorded in suitable log files. The name of the files
includes the current date and TeleGPS serial and flight numbers.
The radio frequency being monitored by the TeleDongle device is displayed at the top of the window.
You can configure the frequency by clicking on the frequency box and selecting the desired frequency.
The TeleGPS application remembers the last frequency selected for each TeleDongle and selects that
automatically the next time you use that device.
Below the TeleDongle frequency selector, the window contains a few significant pieces of information
about the altimeter providing the telemetry data stream:
• The configured call-sign
• The device serial number
• The flight number. TeleGPS remembers how many times it has flown.
• The Received Signal Strength Indicator value. This lets you know how strong a signal TeleDongle is
receiving. The radio inside TeleDongle operates down to about -100dBm; weaker signals may not be
receivable. The packet link uses error detection and correction techniques which prevent incorrect
data from being reported.
• The age of the displayed data, in seconds since the last successfully received telemetry packet. In
normal operation this will stay in the low single digits. If the number starts counting up, then you are
no longer receiving data over the radio link from the flight computer.
Finally, the largest portion of the window contains a set of tabs, each of which contain some information
about the TeleGPS board. The final
table
tab displays many of the raw telemetry values in one place in a
spreadsheet-like format.
3.1.1. Map
The Map tab shows the TeleGPS track over time on top of map data making it easy to locate the device.
