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  #1  
Old 10-28-2019, 08:59 AM
bjdecker's Avatar
bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 331
Default 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
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Brian Decker
Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
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  #2  
Old 10-28-2019, 10:27 AM
jdmrv7a jdmrv7a is offline
 
Join Date: Jan 2018
Location: DFW
Posts: 65
Default

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.
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  #3  
Old 10-28-2019, 09:24 PM
deene deene is offline
 
Join Date: Jan 2005
Location: Georgetown, TX
Posts: 396
Default 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...
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Deene Ogden.
N399AD RV-12...flying
N299AD RV8 QB, IO-390X, BA prop...SOLD
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  #4  
Old 10-29-2019, 02:31 PM
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RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 959
Default

Quote:
Originally Posted by bjdecker View Post
... 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?
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Carl N.
Arlington, WA (KAWO)
RV-8, 790 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflugel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 10-29-2019 at 03:38 PM.
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  #5  
Old 10-30-2019, 07:27 AM
bjdecker's Avatar
bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 331
Default 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
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Brian Decker
Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
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  #6  
Old 10-30-2019, 07:48 AM
maus92 maus92 is offline
 
Join Date: Nov 2013
Location: Annapolis MD
Posts: 457
Default

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.
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  #7  
Old 10-30-2019, 09:39 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 959
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Quote:
Originally Posted by bjdecker View Post
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 ...".
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Carl N.
Arlington, WA (KAWO)
RV-8, 790 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflugel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 10-30-2019 at 10:18 PM.
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  #8  
Old 10-30-2019, 10:52 PM
Ed_Wischmeyer's Avatar
Ed_Wischmeyer Ed_Wischmeyer is offline
 
Join Date: May 2005
Location: Savannah, GA
Posts: 1,301
Default

Quote:
Originally Posted by maus92 View Post
Wasn't the FAA planning to phase out TIS service...
You might be thinking of TIS-A. Not sure
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RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
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  #9  
Old 11-03-2019, 08:30 AM
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bjdecker bjdecker is offline
 
Join Date: Jun 2005
Location: Georgetown, TX
Posts: 331
Default 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!
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Brian Decker
Retired Firmware Guy and Airplane Builder

2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231

Aided and abetted building a number of other RV's.
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  #10  
Old 11-03-2019, 03:53 PM
moosepileit moosepileit is offline
 
Join Date: Dec 2010
Location: Floyds Knobs, IN
Posts: 633
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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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Last edited by moosepileit : 11-03-2019 at 04:03 PM.
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