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FAASTeam
FAASTeam Notice
Type: General Information
Notice Date: Tuesday, June 12, 2018
Notice Number: NOTC7822
ADS-B
This notice expired on
Friday, July 13, 2018

The following reports have been made known to the EMI FSDO regarding ADS-B:

I got a few false traffic hits in the pattern at PtK yesterday(June 7, 2018).  didn't think much abut it as it happens frequently. 

This happened to me frequently last Tuesday evening (June 5, 2018). I was sightseeing flying over the GM Proving Grounds and near Brighton (45G) when it happened about 4-6 times. Each time, ForeFlight on my iPad would announce traffic 0.25 miles away, same altitude. That gets your attention. Each time it was my own ship. I have the Stratus ESG transponder for ADS-B Out, and a Stratus 2 portable receiver for ADS/B In. I assumed this was a minor issue with little chance to change because each time, the traffic came up out of nowhere, which told me it had to be me. But, it was disconcerting the first two times it happened. Thanks for sharing.

Flint ATC suggested that I contact you.  We had some ADS-B anomalies today.  I initially thought it was my unit, however, per Flint ATC, other aircraft were experiencing the same thing.  I was getting notified, for very short periods of time, that an aircraft was at my altitude, within one mile (looked like it was basically on top of me on my unit) - it was either at my 6 o'clock or my 12 o'clock.  This happened on June 6, between 11 am and 1 PM.  Occurred about four separate times.   We were north east of Jackson airport when this was occurring.   

As discussed, here are the two situations I have experienced recently:

Twice, when in the terminal area near the final approach course I have lost GPS guidance. I have a GNS430, GNS530 and G500. All lost guidance. Each time I was in VMC and flying vectors to the visual and/or on visual at the time. Once was when approaching KBUF. I have forgotten the other time. After landing and rebooting the GPS systems all seemed normal. I have since learned that GPS jammers from trucks on the freeways may be causing this to happen.

 

Last Monday I was flying VFR on flight following from KDET to KPHN doing practice approaches. Somewhere between KMTC and KPHN my system painted a contact at my 12 o'clock, within one mile and converging at my altitude. YIKES! The systems defaulted to the traffic pages and sounded an audio alert informing us of the traffic. We never spotted anything and the KMTC controller assured us nothing was on radar. When headed back to KDET, at about the same location, the issue occurred again. This time the target was at my 6 o'clock, at my altitude and converging. Again, nothing was observed, the controller saw nothing on radar and the target just went away. This time we heard other pilots calling in on the frequency reporting a similar occurrence.

From AOPA - For aircraft with “non-performing” ADS-B Out that also use an ADS-B In system, or for operators using some portable ADS-B In systems, the change will mean that their own aircraft may appear as traffic on their display, a phenomenon known as “ownship ghosting.” A similar phenomenon called “target ghosting” can occur when an ADS-B In system receives both TIS-B and ADS-B information for the same target aircraft and displays both as if they were separate aircraft. 

 

Info from FAA Air Traffic Organization locally (ATO)

/6/18 Facility Log entry:  MULTIPLE AIRCRAFT HAVE REPORTED 1 MILE ADSB TRAFFIC. WHEN THEY HAVE REPORTED THIS, THERE IS NO TRAFFIC NEAR THEIR LOCATION. CALLED ZOB FNT SECTOR, THEY ARE NOT HAVING THE SAME ISSUES. TECH OPS IS CHECKING WITH COMPANY WORKING ON OUR INTERNET. TECH OPS SUGGESTED I CALL NETWORK OPS CENTER AT 888/461-7277. KS NOTIFIED, TICKET NUMBER 358345. -- SI

 

Summary:

Please be advised that I have forwarded what I have heard from those above to ATO.

They are working on it.

For tracking purposes I recommend that when this happens to you to please report the matter to ATC.

Then please email me all the details of the event - what, where, when, equipment installed in your aircraft, etc.

Thanks, Pat Ryan (734) 487-7455  or email at (734) 487-7455