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  #11  
Old 03-16-2015, 05:28 PM
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osxuser osxuser is offline
 
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Location: Pasadena CA
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We have this problem with NavWorx in Socal... about 50% of the time.
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  #12  
Old 03-16-2015, 05:40 PM
spatsch spatsch is offline
 
Join Date: Nov 2014
Location: Plano, TX
Posts: 225
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Quote:
Originally Posted by dynonsupport View Post
We've had a few reports of ghosting recently, and most have been in that area as well, so it does likely indicate something unique is up. In the datalogs we have seen, something very odd is happening.
I am getting ghosting on TIS in NJ. Is that the same problem or is that different altogether?
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  #13  
Old 03-16-2015, 08:02 PM
jclark jclark is offline
 
Join Date: Jan 2005
Location: Columbia, SC
Posts: 804
Default Me to @ KCUB/KCAE

Quote:
Originally Posted by mikehoover View Post
I have had this issue for the last several flights in the Columbia, SC area. Not a problem until recently. I gave up trying to outrun and outmanuever my ghost. He's good!
Same as Mike here in Columbia, SC.

Mike has Dynon equipment.
I have GRT equipment.

Previously all worked fine.
I too noticed it within the last 30 days or so.

Also have a friend in the Brooksville/Tampa area whose system that had previously worked fine, now has ghosting.

I wonder if there was a recent upgrade of software to the ground stations.

Anybody on the list here know?????

James
p.s. THe ghosting **MIGHT** have gone away when I had flight following that required a frequency change to controllers at a different location. I need to verify that.
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  #14  
Old 03-16-2015, 08:58 PM
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Aerosport1 Aerosport1 is offline
 
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James and Mike
Have you guys flown north recently up towards Spartanburg. If so did you have ghosting. I notice my ghosting went away once I got about 20 miles north of Macon. I tracked this
Ghosting all the way home Sunday. KFMY fort myers to KLHQ. My ghosting started around KLAL. South of there I did not see any. Curious if anyone that flys regularly south of KLAL has noticed any ghosting in the past 30 days

Geoff
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  #15  
Old 03-17-2015, 05:07 AM
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SmilingJack SmilingJack is offline
 
Join Date: Dec 2010
Location: Hilton Head Island
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Quote:
Originally Posted by Aerosport1 View Post
James and Mike
Have you guys flown north recently up towards Spartanburg. If so did you have ghosting. I notice my ghosting went away once I got about 20 miles north of Macon. I tracked this
Ghosting all the way home Sunday. KFMY fort myers to KLHQ. My ghosting started around KLAL. South of there I did not see any. Curious if anyone that flys regularly south of KLAL has noticed any ghosting in the past 30 days

Geoff
Geoff, I departed X35 to APF Sunday about an hour after you and flew right over LAL. No ghosting the entire way home.
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  #16  
Old 03-17-2015, 11:51 PM
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bacstabber bacstabber is offline
 
Join Date: Jan 2005
Location: Pensacola, FL
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I've been flying throughout my local area around Pensacola without any problems using my NavWorX system. Of all the equipment in the aircraft, this one I love the most. In this high training area, this equipment is so helpful in spotting hard to see, fast moving aircraft. I've never seen any Ghosts on the screen around Pensacola, that was until Monday morning. Flying north out of Pensacola, I had a Ghost until I was about 50 miles out. Then the Ghost stopped. I can't remember if it was after a squawk change or not. I did have another episode of Ghosting nearly a year ago around Knoxville, TN. When I talked to NavWorX, I remember then asking me my squawk code at the time. Therefore, assigned squawk codes may have something to do with Ghosting.
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  #17  
Old 03-18-2015, 02:34 PM
BobTurner BobTurner is online now
 
Join Date: Dec 2011
Location: Livermore, CA
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I found an FAA document on Google, that now I can't find again. Here's a paraphrase of what it said:

The FAA ground stations get data from UAT out, Mode S-ES out, and ground based radar. The software is supposed to identify the aircraft and merge the data together, so that if there is both a 1200 mode C radar target and an ADSB-out target for the same aircraft, only the ADSB data is sent out on the uplink to ADSB-in aircraft receivers. The ADSB data has N numbers attached to it, so aircraft receivers can easily identify it as themselves and filter it out. However, sometimes the software fails and sends both ADSB data and radar data out the uplink. In this case, the radar data may show as a "ghost" on ads-in systems, since it is an unidentified target.

So my question: when you see a ghost, do you ever see your N number associated with it? If the answer is no, then the above may be an explanation.

An interesting test, for those with UAT systems, would be to turn off your mode C transponder and see if the ghost goes away. (Of course this is illegal unless you happen to be in one of the few remaining areas of uncontrolled airspace).
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  #18  
Old 03-18-2015, 04:31 PM
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Aerosport1 Aerosport1 is offline
 
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Bob
I do not see my N-number when getting the ghost. However what's interesting is that with the stratus 2 I also have when I first open up foreflight after having
it off I will see my N-number for a couple seconds than the N-number goes away but the ghost still remains.


Thanks Geoff
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  #19  
Old 03-20-2015, 07:13 PM
Paul K Paul K is offline
 
Join Date: Mar 2009
Location: Grand Rapids, MI
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Earlier this week, I made a flight from Michigan to southern Ohio. I used flight following all the way down and had ghosting about half the time.

On the return trip about two hours later, I didn't use flight following and had zero ghosting! Traveled the exact route, 7500' going south and 8500' traveling back north.

Is there a connection?

Data points:

GRT HX
Sky-Radar D2 ADS-B receiver
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Last edited by Paul K : 03-20-2015 at 07:15 PM.
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  #20  
Old 03-20-2015, 07:31 PM
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Ivan Kristensen Ivan Kristensen is offline
 
Join Date: Mar 2008
Location: Guelph Ontario
Posts: 267
Default No more ghosting!

In recent weeks I have been experiencing the same problem as Geoff with own ships transponder Ghosting in central Florida. It was pretty consistent for me there for a while although at times it would go away during flight and then re-appear minutes later.

It is very annoying, not to mention distracting, to have the 2 mile warning window pop up as it does on the GRT HX screens when all it is indicating is your own airplane.

However, I am happy to report that I saw no ghosting on a 150nm trip from Dunnellon airport (X35) in central Florida to Ft. Meyers (KFMY) in South Florida on Thursday morning and returning today.

At first I thought I had an equipment problem but based on previous posts and this experience it seems to me that the ADS-B system might have had issues and that they have been fixed.
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