Moderators: jsumali2, richierich, ua900, PanAm_DC10, hOMSaR

 
720B
Topic Author
Posts: 373
Joined: Mon Jul 06, 2015 10:52 am

FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 1:28 pm

FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference


https://travelandaviation.com/faa-to-pr ... ence-news/

The moves come as US wireless communications companies prepare on 5 January to start, in 46 markets, transmitting in the 3700-3800 MHz range – the “C-Band”. That range is too close to the 4200-4400 MHz range used by aircraft radio altimeters, the FAA says.
 
User avatar
atcsundevil
Moderator
Posts: 4658
Joined: Sat Mar 20, 2010 12:22 pm

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 1:34 pm

720B wrote:
FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference


https://travelandaviation.com/faa-to-pr ... ence-news/

The moves come as US wireless communications companies prepare on 5 January to start, in 46 markets, transmitting in the 3700-3800 MHz range – the “C-Band”. That range is too close to the 4200-4400 MHz range used by aircraft radio altimeters, the FAA says.

I believe it also affects NEXRAD and weather forecasting. There are concerns that have been raised by the agency since before the bands were auctioned off. The telecom companies recently agreed to a temporarily delayed start for use of the bands (I think the original implementation was scheduled for this month), but I guess it sounds like they're trying to move forward now. I'm certainly no expert on this stuff, but given the pretty dire warnings that have come out from multiple agencies over this, from the FAA to the FTC and NOAA, I'm inclined to believe there are potentially some really serious impacts if this moves forward.
 
ikramerica
Posts: 15187
Joined: Mon May 23, 2005 9:33 am

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 1:39 pm

atcsundevil wrote:
720B wrote:
FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference


https://travelandaviation.com/faa-to-pr ... ence-news/

The moves come as US wireless communications companies prepare on 5 January to start, in 46 markets, transmitting in the 3700-3800 MHz range – the “C-Band”. That range is too close to the 4200-4400 MHz range used by aircraft radio altimeters, the FAA says.

I believe it also affects NEXRAD and weather forecasting. There are concerns that have been raised by the agency since before the bands were auctioned off. The telecom companies recently agreed to a temporarily delayed start for use of the bands (I think the original implementation was scheduled for this month), but I guess it sounds like they're trying to move forward now. I'm certainly no expert on this stuff, but given the pretty dire warnings that have come out from multiple agencies over this, from the FAA to the FTC and NOAA, I'm inclined to believe there are potentially some really serious impacts if this moves forward.

But we gotta what 8K HDR videos on our phones, why not.
 
kalvado
Posts: 3413
Joined: Wed Mar 01, 2006 4:29 am

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 1:45 pm

My understanding is that the issue is with older equipment not really filtering input signal to modern standards on one hand and pretty high power transmitters cell networks use on the other.
Probably a significant - and as usual costly - upgrade of airborne equipment is coming next.
 
User avatar
atcsundevil
Moderator
Posts: 4658
Joined: Sat Mar 20, 2010 12:22 pm

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 1:46 pm

ikramerica wrote:
But we gotta what 8K HDR videos on our phones, why not.

I literally don't know how to argue with that :bouncy:

Between the auction and infrastructure investment from the telecommunications companies involved, they're determined to move forward as quickly as possible. Hopefully they're prevented from doing so assuming the concerns are valid, which by all accounts I've seen, they are. The effects could cause significant disruption to the economy.
 
a320fan
Posts: 984
Joined: Fri May 01, 2009 5:04 am

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 2:06 pm

Is the 5G they’re rolling out in the US different to what’s been operating in many other locations globally with no noise been made about any issues? I believe here in Australia 5G is already quite widespread.
 
kalvado
Posts: 3413
Joined: Wed Mar 01, 2006 4:29 am

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 2:19 pm

a320fan wrote:
Is the 5G they’re rolling out in the US different to what’s been operating in many other locations globally with no noise been made about any issues? I believe here in Australia 5G is already quite widespread.

In a sense it is. Although 5G exists in US as well, it uses frequency bands further away from aeronautical frequencies. This is about the deployment of new bands, closer to aero band.
As far as I can tell from quick search I just did, radio altimetry uses technology which was originally developed... well, it probably didn't change much since at least 707. I assume that the band was chosen as being very far from anything in use at the time.
70 years forward...
 
MO11
Posts: 1920
Joined: Sun Jan 08, 2017 5:07 pm

Re: FAA to prohibit many flight operations due to risk of ‘5G’ wireless interference

Wed Dec 08, 2021 2:32 pm

a320fan wrote:
Is the 5G they’re rolling out in the US different to what’s been operating in many other locations globally with no noise been made about any issues? I believe here in Australia 5G is already quite widespread.


Australia tops out at 3700 Mhz (for C-Band), which appears to be far enough away from frequencies used by radar altimeter.

kalvado wrote:
As far as I can tell from quick search I just did, radio altimetry uses technology which was originally developed... well, it probably didn't change much since at least 707.


Yes, the technology is radar. I suppose all of the equipment could be replaced to operate in a different band.

The weak link in the AD seems to be that a NOTAM will be issued at airports for which radar altimeter minimums will be not authorized. Who is going to be tasked with determining if an offending ground station exists, and issuing a NOTAM?

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos