Traffic, but not weather...

kbalch · #1 02-10-2020, 05:37 AM

My inspection is next week and I?ve been getting all of my G3X parameters configured. In the course of doing so, I?ve noticed that, while I?m receiving ADSB traffic, I am not getting weather (neither Metar/TAF text or radar graphics).

Could this simply be a reception issue with the airplane on the ground?

RONSIM · #2 02-10-2020, 06:19 AM

to get the weather and ALL of the traffic --- that will come from the ground stations.

Ron

kbalch · #3 02-10-2020, 06:21 AM

Quote:

Originally Posted by RONSIM

to get the weather and ALL of the traffic --- that will come from the ground stations.

Makes sense; thanks!

Tailwind/RVGuy · #4 02-10-2020, 06:27 AM

Ken,

I think that is pretty normal. The traffic will display on the ground but you need to be in the air to pick up the METARS and Radar (unless you are really close to an ADSB ground station). In my area, I think I need to be at at least 1500 AGL before the FIS-B (flight information system broadcast) information is available. The traffic information you are seeing (TIS-B) is probably from aircraft that have ADSB out (you can see N numbers). I do not believe you would pick up aircraft without ADSB out while you are on the ground as that comes from a ground station also. Also remember, not all traffic will show up. There are lots of good summaries on how ADSB works if you do a Google search.
Also, I am not an expert so I might be incorrect. I have noticed occasionally how some traffic will disappear while I am flying only to reappear a few minutes later. I do believe it depends on how your system processes the ADSB information as to what happens on your display. Lots of information coming in and different apps/systems process things differently.
Keith

kbalch · #5 02-10-2020, 06:32 AM

Thanks, Keith. I’ll plan to do a little reading on the ADSB tech.

g3xpert · #6 02-10-2020, 08:55 AM

Quote:

Originally Posted by kbalch

Thanks, Keith. I?ll plan to do a little reading on the ADSB tech.

Hi Ken,

As others have mentioned, this is to be expected while you are on the ground. You cannot pickup FIS-B very well, if at all until you gain some altitude shortly after takeoff. Let us know if you continue to have issues with it after your first flight.

Thanks,

Justin

BobTurner · #7 02-10-2020, 12:32 PM

I?m not familiar with the G3X but most efis units have a page where they show the number of adsb ground stations they?re in contact with. If that number is ?0? then, as others said, you won?t see wx nor non-adsb traffic. But if it?s ?1? or more, you should see wx.