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-   -   TIS-B "No Service" (https://vansairforce.net/community/showthread.php?t=176418)

bjdecker 10-28-2019 08:59 AM

TIS-B "No Service"
 
Good Morning Fellow RV'ers,

After extensive troubleshooting, and some creepy-stalker behavior, I think have uncovered a failure of the TIS-B service in the Waco/Austin TX area.

Background:
My RV-7 is Dual G3X Touch, GTN-650, GTX-345 equipped, and configured correctly for ADS-B Out (PAPR report shows passing parameters for Link Version, NIC, NACp, NACv, SIL, SDA, etc.). Recently, I would see the TIS-B Icon indicate a failure while Air-To-Air remained steady, and certain traffic on the G3X display would disappear...

Details:
On my flights originating/terminating from KGTU, TIS-B shows "No Service" and Air-to-Air operating normally. Longer flights out of the area (to KDWH, KLBB, KMDD) show TIS-B Client availability for the percentage of the flight outside of the Austin area.

I randomly sampled various N-Numbers observed on my ADS-B receiver, and each flight shows a similar result, Air-to-Air operating and TIS-B Client is 0%.

From the forum, I see that Asheville, NC and Savannah, GA areas are having or have had similar problems and that the FAA recognized that there were equipment problems in Savannah earlier this year.

I have sent emails to adsb@faa.gov with the details & data.

If you're up for it, and you find yourself in the Austin/Waco area, take a look at your TIS-B service and report back.

Fly Safely!

B

jdmrv7a 10-28-2019 10:27 AM

Yes I have noticed the same issue near the Gray controlled airspace. I fly from DFW to T82 area 3-4 times per month, sometimes west of the restricted space but mostly east of Litle Int.

deene 10-28-2019 09:24 PM

No TIS-B near KGTU
 
I noticed a ?NO TIS-B?? message on my Dynon system (Dynon 261 mode S transponder, Skyview EFIS) during a flight near KGTU about two weeks ago...

RV8JD 10-29-2019 02:31 PM

Quote:

Originally Posted by bjdecker (Post 1382558)
... and some creepy-stalker behavior ...

I randomly sampled various N-Numbers observed on my ADS-B receiver, and each flight shows a similar result, Air-to-Air operating and TIS-B Client is 0%.

B

May I ask how you obtained that info?

bjdecker 10-30-2019 07:27 AM

ADS-B Data
 
Historical flight activity can be obtained from Flightaware, Flightradar24, Radarbox, etc.

ADS-B Performance data is available from the FAA at: https://adsbperformance.faa.gov/PAPRRequest.aspx

maus92 10-30-2019 07:48 AM

Wasn't the FAA planning to phase out TIS service when it replaced radars (that break and cannot be repaired?) Not sure if they would replace all radars in a service area at once, probably not. Just rampant speculation on my part.

RV8JD 10-30-2019 09:39 PM

Quote:

Originally Posted by bjdecker (Post 1383051)
Historical flight activity can be obtained from Flightaware, Flightradar24, Radarbox, etc.

ADS-B Performance data is available from the FAA at: https://adsbperformance.faa.gov/PAPRRequest.aspx

Thanks. I wondered if you requested PAPRs for those other airplanes to get their TIS-B Client info. That's what I thought you might have meant when you said "... and some creepy-stalker behavior ...".

Ed_Wischmeyer 10-30-2019 10:52 PM

Quote:

Originally Posted by maus92 (Post 1383054)
Wasn't the FAA planning to phase out TIS service...

You might be thinking of TIS-A. Not sure

bjdecker 11-03-2019 08:30 AM

Update...
 
Good morning y'all...

The TIS-B outage in the Austin/Georgetown area resolved briefly on Friday, 11/1. Unfortunately, it came back on Saturday 11/2.

I took a flight from KGTU to KLBB and watched my GTX-345/GTN-650 report radio station data for ADS-B; I observed that as the aircraft was 75NM Northwest of Station 11 (Rabbit Hill/Round Rock site) and began receiving the San Angelo site, TIS-B services were restored. The return trip showed the same results; TIS-B services ceased right around the Goldthwaite airport, transitioning from San Angelo to Rabbit Hill.

Emails sent to adsb@faa.gov (9-AJE-ADSB) folks...

Have a great weekend!

moosepileit 11-03-2019 03:53 PM

You would think a mandated system would have outage Notams and a real time coverage map.

They do, it's not a great site and selecting areas gives little info in the popups. Lots of boxes and colors in your area:

https://sapt.faa.gov/outages.php?out...Resolution=0.5


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