ac2cz/foxtelem

AMSAT Fox-1 Telemetry Decoder

foxtelem's Issues

There is a large latency in the IQ decoder between switching freq and hearing the audio

Is this because I made the buffers so large? Why would that matter? Or is it tied to the length of the window? 70 bits is only 1/3 sec though. But given we listen to the audio, we do not need to wait for it to be processed

Needs more investigation.

When listening to a wav file it suddenly plays fast if "squelch when no telem" is checked

Should be able to graph one value against another

This is hard and requires two axis.
We should also be able to graph against UTC vs uptime
We should be able to graph vs azimuth and elevation with the value in a shaded color

The type for LEP packets within Vulcan Packets is incorrect

They do not decode correctly with the test data

Add RED, AMBER, GREEN thresholds to the layout files and color the values on the health tab

The lookup tables for Temperature should also be saved as external files

These are common across all spacecraft, so I did not save in external files. However, they could change in the future. Best to have them as external configuration.

If there is no audio device on Linux then Wav files play back quickly even if you monitor the sound

If you enable server uploads, should it send all the past records that you have not previously sent?

Yes. But this requires us to note in the logs if a record has been uploaded. We could do this by noting the last reset/uptime or last UTC time that records were uploaded and upload everything since then.

When the user clicks the sound card combo box, we should rebuild (or build for first time) the list at that point

We want to support hot swapping of devices if we can.
We now rebuild the list, but it resets when a device is added. This is not the nicest user experience, but it is perhaps better than restarting. Downgraded to Wont-fix

The radiation tab status bits don't have a value for "2" "0" "5".

And they don't fit to the left of the graph.

I don't have any values for these. Are they bogus values?

If only one point plotted in a reset at the end of the graph then it is a single point

Perhaps checking "Continuous Uptime" should also connect the resets together?

If a jpeg is corrupted (e.g. Bogus Marker Length) then we can not load it and create a thumbnail

We therefore do not even know that it exists on disk.

On Linux, if you are using FCD IQ decoding and try to stop the application it hangs

At this point the only way to get rid of it is to kill the process. It hangs the VM, so this could be a virtual machine issue. Does this happen on a real Linux install?

Maybe this is because I do not close the HID device? But on Windows (at least) if you close the device you can not reopen it.

The SourceAudio circular buffer should be mono

It is a waste of memory for it to be stereo.

We get corrupt packets complaining of Seq 0

But we should not have packets with sequence 0, so that looks like a bug

We can improve the decoder with triangular sample

We do not filter the added data with the DUV filter. We should add it back to the raw data and refilter, perhaps, though that is much more CPU given the clock resyncs most windows?

Should check if this makes a difference. We are missing AGC and DC filtering, as well as LowPass

HighSpeed does not work on the FCD V1 (96000).

Likely because the downsampling and filtering does not quite work for 96000

Burns reported that the decoder is stopped before a wav file is fully procssed

If the last frame is very near the end then we do not decode it. We need to have some fluff at the end.

Could not fix this easily. Needs more investigation.

Dragging FoxTelem window between two monitors - the program stops responding

KD6OUB: I have the laptop docked and the lid open with resolution set to 1600 x 900 . I am running another monitor connected to the dock with resolution 1920 x 1200.
Issue: I launch the program and when I drag a window between the two monitors the program stops responding. I have to stop and relaunch.

The FFT panel and the audio panel do not reuse the graph panel code - and it should

All of the sound cards selected seem to be the default mic.

Does not read from a USB sound card or the mic socket.

Need to go into the System Preferences>Sound then select Input and set the device you want as the sound input. Add this to the manual?

The jar file in the tarball should be executable. So should the start script.

Small errors in the frequency reading mean that the TCA calculation does not work

The measured frequency needs to be more stable.
This is better in 1.01 but more work is needed. Perhaps curve fitting?
Possiblly because the first differene is at the end of the two samples and not in the middle. Should we use three samples and plot value in the middle? Or interpolate the frequency as between the two values?

The frequency of the FoxTail should be measured by the pass manager

Request to support Douglas' research

For small graphs, half of th vertical drawing area is now not usable

Perhaps draw the buttons on the canvas, then hide them if you copy the screen. Or allow the buttons and search options to be hidden and expand the drawing area.

If you hide the graph then the range should be set based on the avg or the first deriv.

Sometimes the deriv is not visible because the difference is too small to see.

Comparing the strongest found to the average noise around the pass band

In the pass manager we are looking for a signal by comparing the strongest found to the average noise around the pass band. This fails if the passband is sitting near another strong signal. Meaning the strong signal is also in the passband. It is then counted as part of the noise and distorts the calc.

We could sample the noise on either side of the satellite pass band instead?

W7KKE - Ken asks - Can FoxTelem auto start when it is launched?

In the graph classes, we have hard coded 0 as the payload type for measurements

Strictly type 0 is the Debug Payload

We should have a different type like 99 or something and define it in FramePart where the other types are defined.

In High Speed mode the memory usage creeps up with each frame by about 3-4MB

After a while the GC pulls it back. Need to review any NEW statements in the High Speed path. I think that is done for DUV. This was in AF mode, not IQ

I need a Java 7+ launcher for the Mac

Oracle and Apple have made a mess of Java. I am using a Java 1.6 launch method so that it works on all platforms. But this requires the user to install the legacy 1.6 version of Java. They should be using V1.8. This needs a new launcher.

Should allow the user to select tabs at TOP or SIDE on the settings tab

Add the ability to open a second "Input" tab so that you can download from another radio or source

This would allow you to have one radio listening to 2m and another on 23cm for example. Or to have two 2m receivers on different frequencies, or two FCDs....

Would need to make sure that updates to the payload store are thread safe. Today they live in the decoder, which sits on the Input tab. So we expect to be synchronized with it, even though the actual decoder is running in its own thread, we never have two updates at the same time. We get multiple reads, but that should be safe

Move common routines to a library or shared code segment

We have file routines in the payload store classes that we cross reference from other classes. We have date routines in the FramePart class that we cross reference from elsewhere. These should all be moved into a common lib

The first "tick" in the horizontal graph label for a given reset, is not at the start of the reset.

It is the first value after it. We should insert one special tick at the start, with the unique value perhaps?

At about 300,000 frames FoxTelem crashes on Marks test of high speed

This must be fixed. FoxTelem runs out of memory. We could start it with -Xmx1024M? Will that fail in some machines? Is it a param we store somewhere?

We could fix this with the option to use a database backed version. Select it and FoxTelem does a one time load. Use Derby. This means the DB code needs to support Derby and mySQL. Actually the user could choose then, in case they are a mySQL user or want to put the DB on a separate machine.

If password saved in settings, we need to Hash it. How to make secure when the hash is open source?

The other option is a flat file chunked database. This is perhaps the fastest but not the easiest to implement.

Need better AGC

We should have a better AGC algorithm and it should be a separate filter. We should not call it in each filter.

The diagnostics save raw numbers when exported to CSV file

It would be nice if you had the option of raw or translated.

In contrast copy/paste of the table takes the translated values. So you can get them into excel that way, for example

We should remember the tab that the user was on when the exited

Apply a selectable low pass filter to the monitored audio

Low pass the communication band, say below 3500-4000 Hz
Implementing this demonstrates how bad my AGC is. It instantly amplifies the noise when people stop speaking and sounds very bad.
I should work out why my GAIN calculation for the filter is not correct. Playing the audio back unfiltered sounds fine...

Also must do this without converting to/from bytes!

If the title is too wide for the graph window then it should be split to 2 lines

eg.. The frequency graph

The FCD is defaulted to the wrong sample rate in the MacOS when it is first plugged in

Provide instructions in the manual. There are also issues for Linux.

I saw this on a legacy version of MacOS, but people have not complained about this. Is it really an issue? Or is "setup of the FCD" outside the scope of FoxTelem and people search the internet to get it right?

The icon is low resolution

We also only have one size, so we don’t see a bigger icon when windows shows medium or larger icons

Microsoft recommends that icon contains 48x48, 32x32, 16x16. 24-bit with 8-bit alpha (32-bit), 8-bit (256 colors) with 1-bit transparency, 4-bit (16 colors) with 1-bit transparency. And has instructions on how to create .ico file. But not sure this is cross platform...
For some reason JSmooth does not like the icon files that I have created - because it needs to be 8 bit and 256 colors.

Was xls27

Add config/settings button to graphs for background color and line color.

Add share buttons for facebook, twitter, email. This can also be where we allow another graph to be plotted side by side.

Should also have share buttons on the camera image.

If you rename the logfile dir and then restart - FoxTelem silently fails and does not start

Partially fixed. Does not crash now but you get a series of error messages.

The launcher does not find the 64 bit version of Java which is installed in Program Files

Confirmed as a bug when I built a new machine and had only installed the 64 bit version. Installing the 32 bit version fixes this.

We still get the Line Unavailable error when switching from low to high speed in Fox Labs

Also some testers get it when switching audio devices

Funcube Dongle Pro is selected and you select 96000 bandwidth, when you select the Start button it changes to 192000.

VK5HI - Colin reported: when the Funcube Dongle Pro is selected and you select 96000 bandwidth, when you select the Start button it changes to 192000.
The bandwidth does display correctly at 96000kHz.

We repeatedly try to decode all of the rad packets and keep printing the same errors each time

If we are using the FCD and the absolute signal level is above a threshold, then we should turn off some of the gain…