FoxTelem Version 1.06 Released

​I am releasing version 1.06 of FoxTelem today.  This release addresses several defects and instabilities in FoxTelem 1.05 and earlier.  It also introduces a new Earth Plot that allows any telemetry value to be plotted as a heat map against a map of the earth.  For more details about the Earth Plot and some example plots, you can read a quick tutorial that I have written here:

As always, let me know if you see any issues or log them on Github at

* EARTH PLOTS allow you to plot any telemetry value as a heat map on a map of the earth
* Allow graphs and telemetry results to be searched with UTC dates and for ranges of uptime/dates
* Allow stepping through the telemetry with up/down arrows
* Prevent hang when decoder starts if FCD returns an error
* Fixed bug where TLEs were not updated in the name is changed in the spacecraft settings window
* Fixed crashes introduced in 1.05 release
* Display all HERCI High Speed payloads when Raw Byte Payloads shown.
* Fix bug where missing TLE disables spacecraft from being tracked at all
* Fixes bug where DDE connection to SatPC32 fails with European decimal point format
* Add MPPT calibration values for Fox-1D
* Improved the RF signal measurements
* Improved the Find Signal algorithm
* Space graph labels more evenly
* Put the spacecraft tabs in FoxId order

And many other bug fixes. Full list of changes here:

You can download the latest version of the program from:

FoxTelem v1.05 Released

AMSAT’s preparations for the launch of RadFxSat (Fox-1B) on November 10th continue at a breakneck pace. FoxTelem developer Chris Thompson, G0KLA/AC2CZ, today announced the release of FoxTelem v1.05 on the AMSAT-BB. Among other improvements, upgrading to this release is required for the proper decoding of RadFxSat telemetry. FoxTelem versions for Windows, Mac, and Linux can be downloaded at

Below is the full text of Thompson’s post on the AMSAT-BB:

​I am pleased to announce a new version of FoxTelem, Version 1.05.  This will make you ready for the RadFxSat launch in 2 weeks time,  at 01:47 PST (09:47UTC) on November 10, 2017.   You will also take advantage of over 60 fixed defects and changes applied to the code base.




Accurately decode the data, display the results of the experiments and forward it to the AMSAT server for analysis by the experiment owners and other amateur scientists like yourself.  This version will also be able to download the RadFxSat data from the server.


You can use a new feature to calculate the position of the satellite. This is  enabled on the settings screen. The TLEs are automatically downloaded each
week and stored in EPOCH order.  This will be used to plot historical graphs in the future.  See the manual for more details.


You can set FoxTelem to only decode when the satellite is up.  This is designed to save CPU power when many copies of FoxTelem are run at the same time.


You can run FoxTelem in a new way.  If you pass a directory on the command line then it will use this as the location of the config file and the
log files. Previously you needed to create a batch file and run a special command. That will still work, but this should be easier.  See the manual for details.



* Implements changes needed to support RadFxSat (Fox-1B) which launches Nov 2017
* Simpler approach to run multiple copies of FoxTelem with different configuration settings
* Calculation of spacecraft position for users on Linux/Mac or those without SatPC32, including automatic TLE/KEP management
* Automatic start/stop of the decoder to save CPU when running many copies, based on FoxTelem calculation or SatPC32
* Runs on the Raspberry Pi 3
* Storage of the spacecraft .dat files in the logfiles directory to avoid issues where the install directory is not writable
* Plots 450 deg and 180 deg Az/EL correctly
* PSK decoder in readiness for RadFxSat-2 (Fox-1E)

And many other bug fixes. Full list of changes here:

You can email me with any bug reports or issues that you see.


FoxTelem Release 1.04 Supports New Graphs, Better Performance, and the Upcoming Launches

From FoxTelem developer Chris Thompson, G0KLA / AC2CZ:

This is a quick note to say that FoxTelem Version 1.04 is being released. There is a lot in this version so I have written some blog posts to summarize new features.  See below.

You can download FoxTelem for your platform from one of these links:

Broadly speaking the changes fit into the following categories:

1. Full support for Fox-1Cliff, Fox-1D and RadFXSat including better High Speed decoding and a better find signal algorithm.

2. Additional analytical capabilities so you can plot one telemetry variable against another.  I hope this will inspire more people to analyze the telemetry from the spacecraft and post comments on what they see.  I have put some of my own thoughts online here:

3. Enhanced tools to analyze your ground station with SkyPlots for satellite measurements like Signal to Noise ratio and graphs for pass measurements. Skyplots in particular need a bit of explanation, so I have written more details here:

You can read a full list of the changes here on github:


FoxTelem Version 1.03 Released

FoxTelem Version 1.03 has been released

This version of FoxTelem uses a new datafile format. While we store our
data on the server in an SQL database, we use a flat file database for FoxTelem. A
flat file format is nearly optimal for a program that mostly adds new data to
the end of a growing list. With that said, we need to be able to load sections of
the data into memory for efficient analysis.  The new data file format allows
that. If you have been downloading data from the server for analysis, you will
see that this format is much faster.

Read moreFoxTelem Version 1.03 Released