Messages

16

Technical Support / Re: Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 15, 2021, 07:28:37 pm »

Hi Clive,

   To get the GPRMC messages being sent firstly you need to download a track file from PilotAware.
This can then be opened in Excel (select all file types), in the text input wizard highlight Delimited,next, select Tab and Comma, next, select text and Finish. This should populate the spread sheet. Now you need to filter the data. Select data, filter, and tthen select only the GPRMC message type in column A.
 
  BTW there may be a much easier way to achieve this I'm self taught and complete amateur with Excel.

Once you have the messages you can see column B time stamp , position, speed and heading, date.

17

Technical Support / Re: Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 13, 2021, 08:43:14 pm »

Hi Clive
Not much to report back yet. I had an earlier reply which basically said that the GPRMC messages being sent to the transponder had no position or speed included. And that therefore the transponder wouldn’t work correctly. Said it was a PilotAware error. When I pointed out that the aircraft was stationary at the airfield they were quick to admit they had got it wrong. I have since sent the correct GPRMC files to match the flight linked above. As far as I can see at all times when airborne PilotAware was sending all the correct info to the transponder. Funke have said it’s may be due to having a slow ground speed.
  If I hear more I will post

Regards Brian

18

Technical Support / Re: Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 10, 2021, 05:47:46 pm »

I have heard back from Funke today. It appears that I didn’t attach the $GPRMC file on the email to them. So job to do.
What is interesting to me though is that any Trig equipped aeroplane always seems to track correctly on Adsb exchange and also via the PilotAware ground stations, whereas my plane often is displayed tracking incorrectly on the same sites. I’m pretty certain that the GPRMC messages going to the transponder are correct.

 
Regards Brian

19

Technical Support / Re: Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 09, 2021, 11:41:30 am »

 Hi Peter,

Yes I'm afraid it doesnt look great.

I'm aware of one other aeroplane fitted with a Funke TRT800 and the 6.3 software. This also doesnt track correctly when on ADSB exchange.
What would be helpfull is if other such aeroplanes  with GPS from uncertified source could look at how their aeroplane is reported as tracking via one of the tracking sites.

Also if anyone has a screen shot of Skydemon (others available) showing your plane clearly not following the track being flown. Obviously these will not be easily come by, needing someone PAW equipped in loose formation with both flying the same track.

 What really concerns me is what is depicted when an aeroplane is "reversing " down the track being flown. Does it have a direction vector still pointing north when actually travelling South? Maybe there is no vector shown at all?



In response to a previous email I received this reply.

Dear Brian,

yesterday I had a long discussion with our tech guys. Actually they say
... well they have no explanation. We tested and certified our software
and we can say that the TRT reports only the data it gets.

The only way to find out what happens is to monitor the GPS-input and
compare it with the ADS-B-output. We have done this in extensive tests,
all works well. We can never be absolutely sure that there are no errors
in software so what we have to do is the monitoring described above.
This would require any kind of device recording the RS232-data.

Since I am not aware of the ADS-B-receivers used for your recording I
would like to note that we found some problems with ADS-B-recording
here. E.g. some receivers calculate heading and speed based on position
data rather than the data in the RMC. Especially for slow planes this
can result in erratic result.

Please do not hesitate to contact me for any further question.

Kind regards


So now Funke have the $GPRMC messages for a track bing flown and the resulting display on adsb exchange. The flight was also monitored by a friend PAW equipped,  at many points my vector and the aeroplanes actual direction of travel didnt coincide with the track being flown.

I will post Funke's next response when I get it.

Regards Brian

20

Technical Support / Re: Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 08, 2021, 05:50:28 pm »

Further attachments

21

Technical Support / Aircraft Orientation Issues When Using Funke Transponders for ADSB Out

« on: May 08, 2021, 05:48:37 pm »

I have a Funke TRT800, latest 6.3 software and hardware having taken Funke up on their substantial discount offer  to upgrade from a 5.2 software transponder. At the moment I dont believe it is functioning correctly with the uncertified GPS data being sent to it. This despite assurances from Funke that all has been tested and certified.

Below is part of an email sent to Funke from which I'm awaiting a reply

Dear Michael,
Please can you ask you tech guys to explain the attached tracks as displayed on the ADSB exchange site. The first is  G-CIJO my plane equipped with the latest Funke TRT and 6.3 software. NMEA data in at 9600 bd.   Consistently my plane is shown as tracking North when obviously not going in that direction. Only just prior to landing does the plane show the correct orientation.

https://globe.adsbexchange.com/?icao=406cb1&lat=52.132&lon=-0.314&zoom=11.0&showTrace=2021-05-02      The Track replay of G CIJO  Funke equipped  Sunday 2nd May 2021

My Friend who was flying in loose formation with me whose Trig equipped is perfectly tracked on the adsb exchange site and also performs correctly when .trk files are replayed via the Aircrew website.

We have looked at the $GPRMC messages grom PilotAware to the transponder and all appears correct.

I'm awaiting a response from Funke, they were also sent the $GPRMC messages relating to the attached track.

Obviously I'm concerned how my plane is displayed via EC. How does my plane get depicted on Skydemon when its "reversing" down the track being flown?

Regards Brian

22

OGN-R PilotAware / Replacing SDR's ( Re run config)?

« on: January 03, 2021, 03:53:16 pm »

I believe that I may have issues with the adsb dongle on my site PWEverton.
If i swap it out what do I need to do. Simple steps please.
Thanks Brian

23

OGN-R PilotAware / Re: SDR Dongles

« on: August 29, 2019, 06:10:52 pm »

Hi Lee,
I have had a look at the antenna, one coax joint wet and corroded so despite best efforts it has got wet!
Hopefully not the SDR after all.

Brian

24

OGN-R PilotAware / Re: SDR Dongles

« on: August 26, 2019, 10:53:16 am »

Hi Lee,
My Pi and SDR are located inside my office , no chance of water ingress!

Regards Brian

25

OGN-R PilotAware / SDR Dongles

« on: August 26, 2019, 08:41:32 am »

My site PWEverton doesnt seem to be getting any glider traffic. It used to have great reception. No gliders for last 60 days according to the Onglide Range site.
The SDR is hot to touch. Whats the latest thinking on SDR's, the current one is a Nooelec NESDR SMArt v4 SDR - Premium RTL-SDR w/ Aluminum Enclosure, 0.5PPM TCXO, SMA Input. RTL2832U & R820T2-Based Software Defined Radio ( well thats what it looks like and says nooelec on the side)
 
I am also getting the latest software installed and need another sdr for the MLAT.
Whats the best cost effective solution. Whats the most reliable to use?
thanks Brian.
 

26

Technical Support / Re: GPS Battery?

« on: March 07, 2019, 08:05:04 pm »

I have also suspected the internal battery failing.
Opened dongle up, voltage at Battery 0.08v. On charge 3 days it’s now reading 3V.
Hope satelite acquisition times improve.

27

Technical Support / Re: WiFi Dongle Replacement

« on: February 04, 2019, 07:17:01 pm »

Thanks for the link Sean.
I'm just trying to figure out why it's taking so long to get a position fix for Skydemon. It always used to be really quick, now taking several minutes, even after being switched off for a short while in the same location.
I have another GPS dongle somewhere, I must find it and see if there's any difference.

28

Technical Support / Re: WiFi Dongle Replacement

« on: February 04, 2019, 01:10:52 pm »

Just a quick question:- I'm guessing that the dongles have a built in battery to enable memory of recent location. Does this fail over time ? as mine seems to take significantly longer to get a location fix now.

regards Brian

29

OGN-R PilotAware / Re: New Stations Added

« on: May 16, 2018, 04:17:45 pm »

Pauls a very busy bee!!
Good work its appreciated
Brian

30

Technical Support / Re: blue circle on screen

« on: May 07, 2018, 04:54:17 pm »

If this is on Skydemon it maybe your glide clear range? Where you over water or the Fens/low ground?