Question about network repeatability

[fil]

I have two Radarboxes connected to 2 windows XP PC's on my WAN. The boxes are normally around 6KM apart but receive vastly different coverage. Both PC's have a public routed IP address. I have remote access to both of these PC's.

I see flights in "MyFlights" that do not appear in the opposite end "network". Some do, most don't. It seems to be random which ones are shown.

I have purchased Realtime tracking upgrade for one end, however I don't see an increase in the number of displayed flights or the overall repeatability.

Is the problem at my end? I don't see how that could be. Both PC's have full, direct access to the internet and can see the radarbox network, first time, every time. Both have no antivirus. windows Firewall on or off makes no difference. The OS on the PC's was installed fresh for the project and have had very minimal change from standard. The PC's only duty is radarbox.

I have been on the road the past week and have taken one of my boxes and a spare laptop to test. I would setup the box whenever i stopped for longer than a few minutes. I have wireless internet and most times could not see any of my laptop tracked flights on the other PC and vice versa. There were local "MyFlights" that were beyond the coverage of the other end and still did not appear in the opposite end "Network".

In a recent email-out from Airnav, they said that they had a secured a permanant feed covering Sydney AP. I do see some network traffic from sydney, but only occasionally... Does anyone else see "permanant" traffic from sydney?

Does anyone else have 2 radarboxes and a remote controlled PC that they could confirm this behaviour?

Is there any problems with the radarbox server that could be causing this lack of repeatability?

Cheers...ƒil

[AirNav Support]

It seems as if your boxes are picking these aircraft at the same time. Example:

- Box A picks up SIA799 and gets ADS-B positional data and shares this on the network.

- Box B 6km apart has poor reception of SIA799 but it manages to pick up the Mode-S signals (smaller in size and therefore able to be picked up rather than the ADS-B before being distorted). When Box B download the network data, the network data has SIA799 but the logic which follows is that if your box is picking up anything from its antenna it is given priority.

A few users have questioned this in the past but its not easy to smooth the transition between local antenna flights and network flights.

I hope that explain what you are seeing. You may be able to test this out by actually taking out the antenna at one location and checking to see whether those missing flights in the network appear.

[fil]

I did try disconnecting the antenna on the local radarbox (with real-time network) while watching the remote end "myflights"...I did not see much of an increase of the number or repeatability of network flights on the local box.

Yesterday I was out of town, around 180Km west from home my location. I setup the radarbox on arrival on a dedicated laptop. I kept my eye on it, and the remote end, paying particular attention to the exact conditions that network traffic would show or not show on the map....however I could not pick up on any pattern. It seems to be totally random.

I could understand if the network flights data was constant and repeatable...but its not consistant....Some flights show, others don't.

Does anyone else see my flight data? I'm in Tamworth, NSW, and run at least one radarbox 24/7, Since october 2009. I see 200+ individual aircraft per day.

Has anyone seen Sydney traffic since my last post?

[fil]

I spent easter at the inlaws house, 20Km southwest of my home, with my laptop and second radarbox. I also had a second laptop for watching the remote radarbox at home.

Due to the large hill directly to the east of my home, the coverage from 0-180 degrees is reduced to 50NM whereas 180-360 I get greater than 150NM. The inlaws house is on flat ground, with no hills for 10's of km. The coverage from thier house is nearly perfect...greater than 150NM in all directions.

Flights that were tracked at the inlaws house that were in the blind spot of the home radarbox (and not showing s-mode) didn't consistantly appear in "network" or be drawn on the map.

I do see occasional sydney traffic but it is not consistant nor repeatable. The same aircraft type flying the exact flight path do not behave the same way, some show in network where others don't. Even within minutes of each other.

I have installed "planeplotter" and see very consistant sydney flights from several contributors. I don't belive that all of these contributors would be non-radarbox spotters.

Is there a fault with my end? I formatted my test laptop, reinstalled XP, completly windows updated, reinstalled only radarbox and all dependancies. This made absolutly no difference...

Its difficult to accept the randomness of the radarbox network... especially when I can see the remote end "MyFlights" and they are not plotted on the local end network flights or map.

I have proven that internet connection is not a contributing factor.

There has to be a problem at airnav's end. I think that less than 20% of the total flights in Myflights acctually made it to the remote ends network flights.

[jannuh]

Four out of six PP sharers are sharing ADS-B, so no Mlat.
Two are Acars sharing users.

You can have a look at it here: http://scooterhound.com/WWWR/

[AirNav Support]

fil,

Your testing will still run into the same issues of you receiving local flights and hence the data from your other box won't be shown on the network.
Its where the overlap occurs of the Mode-S signal that's where you likely to get as you have described.

Please do the following next time to make sure the test is accurate, take your second RBs antenna off or go into a basement. This is where you will know that you will not get any signal from any other aircraft (check your not getting any messages) so it will only display network flights. It then should show you all the flights that your first RadarBox is picking up. Take screenshots of your local RB and your second RB remotely connected so we can take a look if you get anomalies.

We see no logical reason that if your sharing your data why it won't be displayed on another RBs network if that RB hasn't picked it up locally but we will be happy to investigate if you can show us through accurate testing that its happening without a local flight being picked up.

[johnboy]

I dont recall having ever picking up more than 3 flights at a time round the Sydney area, sometimes nothing.

[fil]

...for the last hour (the whole time i have been watching today), radarbox network is working flawlessly. For the first time, i have been able to listen to sydney control tower audio and watch them come in....repeatably

Thanks to Airnav?

Anyhow, Thanks.

[tarbat]

Don't know if this helps, but here's a side-by-side comparison of the Airnav network vs. the Planeplotter network around Sydney.

[pjm]

...for the last hour (the whole time i have been watching today), radarbox network is working flawlessly. For the first time, i have been able to listen to sydney control tower audio and watch them come in....repeatably

I notice there is a sharer from Turramurra online at the moment. Typically he and I get pretty good coverage of the Sydney area, but I haven't been online much lately...

http://www.airnavsystems.com/RadarBox/ANRB-NWMap.php

geoStuff('Turramurra','Australia',-33.8225,151.2158);
geoStuff('Tidbinbilla','Australia',-35.2833,149.2167);
geoStuff('Brisbane','Australia',-27.7668,153.1);
geoStuff('Wollongong','Australia',-27,133);
geoStuff('Tamworth','Australia',-34.9333,138.6);
geoStuff('Boolardy','Australia',-34.8833,138.7333);

[pjm]

Don't know if this helps, but here's a side-by-side comparison of the Airnav network vs. the Planeplotter network around Sydney.

I've just fired up RB and am now sharing on the RB network

Right at this moment its pretty quiet over Sydney, so I'm not sure how long the timeouts are on PP (or your RB Network settings. Last 5 minutes the most I've seen is 9 aircraft live in the skies. Here is the current view (and my polar diagram)

[viking9]

Don't know if this helps, but here's a side-by-side comparison of the Airnav network vs. the Planeplotter network around Sydney.

But surely, as the AirNav network does not show aircraft without full ADS-B , to be really useful you need to show the simultaneous aircraft listings from both applications to enable a fair comparison to be made?

[tarbat]

But surely, as the AirNav network does not show aircraft without full ADS-B , to be really useful you need to show the simultaneous aircraft listings from both applications to enable a fair comparison to be made?

Not sure why that would be relevant to the discussion.  The original posters question was about aircraft missing from the Airnav network, and the Airnav network only ever shows ADS/B aircraft.

Unless the original poster is expecting non-ADS/B aircraft to appear on the Airnav network?

[viking9]

Not sure why that would be relevant to the discussion.  The original posters question was about aircraft missing from the Airnav network.

Indeed. That's why I was wondering why you decided to compare it with the PlanePlotter network. ;-)

[tarbat]

Not sure why that would be relevant to the discussion.  The original posters question was about aircraft missing from the Airnav network.

Indeed. That's why I was wondering why you decided to compare it with the PlanePlotter network. ;-)

Because the original poster said "I have installed "planeplotter" and see very consistant sydney flights from several contributors".  It seemed relevant to show what extra aircraft were appearing in Planeplotter that weren't on the Airnav network.