Topics

1

Technical Support / Understanding Aircrew Playback Nomenclature / ModeS3D

« on: July 27, 2019, 01:37:01 pm »

I've been lucky to complete about 5 hours of flying with the latest software release. This includes flying within range of at least three OGN-R ground stations. I'm trying to understand what additional traffic I may have received as a result of the latest software. In the attached I show an example of an a/c close to Compton Abbas. In Aircrew it shows:

Registration
A = Mode A
C = Mode C
S = Mode S
P = Pilotaware???
U =
M = MLAT

Is there any documentation for the Mode letters / indicators we would see in Aircrew and/or also in the Traffic Status screen of PAW?

Similarly, what might I see in the Track file that shows "uplink" data?

Lastly, in Aircrew Playback, as you move close to a Ground Station, it illuminates with a green beacon - does this indicate receipt of uplink data? If so, the range seems very limited.

Sorry for all these questions in the Technical section of the Forum but the latest release is an amazing piece of work bringing a lot of in-flight information - I'm keen to understand how the ModeS3D is helping! Thanks for the great work.

2

Technical Support / Frequency Warning under hot weather conditions

« on: July 27, 2019, 12:27:41 pm »

Can anyone explain the significance of the Frequency=Warning status and also the two temperature indications? (See attached)

I've a good quality Anker power supply and cable and recently swapped with a Pi 3B+. Fitted with a single RTL-SDR (low power unit). I get no warnings in my home testing up to about 60 degrees. This was a very hot day (which day hasn't been!).

I flew two segments and although the Frequency=Warning was displayed most of the time I can't say I experienced any issues with use (connected to SKD). Just want to check the meaning of the warning and whether this is just temperature related.

3

Technical Support / What's a Good Temperature?

« on: July 09, 2019, 05:34:06 pm »

I had the day off so have been "refurbishing" my PAW. I've upgraded to a Model 3B+ and continue to use my Rosetta low power SDR and also a Stratux GPYes ublox 8. In addition of course loaded the latest and greatest software. I was hoping the temperatures would be more reasonable than before but they seem the same.

I placed the unit on a windowsill in the sun with an ambient temperature of 24 celsius and after a couple of hours the unit peaked at around 71 celsius. I had an ipad and SKD connected throughout. There was no throttling reported. In the cockpit of our PA28 on a hotter day I could see this going higher.

Is there any guidance or experience on what a more normal temperature would look like and in particular at what temperature will the processor start throttling? I am also assuming its the close proximity of the Bridge that affects this as well?

Lastly, any experience on fitting heatsinks and/or fans? The 3B+ has a much better metal screen on the SoC and I doubt there is space to fit anything due to the Bridge piggyback. I saw some prior comments on the use of fans affecting the Bridge due to changing the air pressure in the case but these seem to have been not proven. I've a couple of 30mm case fans and was considering wiring these into the 3B+.

Welcome any feedback and experience.

Well done to the PAW team by the way for the new release (I've already done a flight test and was impressed!).

4

Technical Support / SOLVED! Automatic Software Upgrade not functioning

« on: June 11, 2016, 06:16:48 pm »

Have connected the PAW via an RJ45 to my router and followed the operating instructions. My current software is 20160511 (so supports the automatic upgrade). I can see and download manually 20160530 and its been notified on the forum. When I select check for updates it spends a few seconds checking and then states no software updates available. I also noticed an error flash on the screen during this process. Log extract below.

I assume its not downloaded the update and can't find it in ./Updates.

Any advice or shall I perform a manual update? Thanks

ls: cannot access /root/cache/Updates: No such file or directory
ls: cannot access /root/cache/Updates: No such file or directory
ls: cannot access /root/cache/Updates: No such file or directory
(18:06:01) SYS-MON   : Update Track
ls: cannot access /root/cache/Updates: No such file or directory
(17:58:01) SYS-MON   : Update Track(17:59:01) SYS-MON   : Update Track(18:00:01) SYS-MON   : Update Track(18:01:01) SYS-MON   : Update Track
(18:02:01) SYS-MON   : Update Track(18:03:01) SYS-MON   : Update Track(18:04:01) SYS-MON   : Update Track
(18:05:01) SYS-MON   : Update Trackls: cannot access /root/cache/Updates: No such file or directory
(17:57:55) TRX-SER   : Configuration Complete