I'm watching ADSBexchange too.
replyIt's eerie seeing the total number of aircraft tracked decrease. I put on a filter for 1000' to 80000', to exclude aircraft on the ground, and the number was around 12K when I started watching. It's down to just over 9.4K now. Wild.
Edit: 22 minutes later and the count is down to 8.4K.
If you haven’t seen it, there’s an exhibit about 9/11 at the Smithsonian Air and Space Museum in DC that shows the airspace in the lead up to and just after the attacks. If you find the traffic changes now interesting, I think you’ll find that interesting as well. It’s possible it’s online if you do some googling
replyNow under 8k
replyTo be fair, above FL400 4̶0̶A̶G̶L̶ is relatively high for most airliners. Most are between FL300 and FL400.
replyFL400. 40 AGL is doable for almost all airliners ;)
replyActually that would be quite challenging over most terrain.
replyThanks. Meant to slap a k on that 40.
replyI'm also near Detroit and am watching the trackers and I'm pretty sure I just saw N831AK take off from Troy Oakland in violation of the grounding order. I wonder how common that is.
replyIt doesn't look like the stop really applied to VFR flights, so I wouldn't expect an old Glasair taking off from a municipal airport to be affected.
replyI saw several flights taking off actually. Like this one from EWR. https://globe.adsbexchange.com/?icao=394a08
replyI live in the general area of you too. Nice to know that there are Detroiters on here.
replyLooks like some flights are taking off from JFK
https://globe.adsbexchange.com/?icao=4cc58a
replyIt could be the flights that are heading directly away from US airspace over the atlantic to free airport space for other planes?
replywhy are there so many planes out and about right now? Most of these could have landed long ago I would think.
replydeleted
replyAbsolutely tons between 10K-20k, though.
replyMy view on ADSBexchange is centered on CMH, zoomed out to Washington D.C. to the east, and filtered by 18K up I've got 142 aircraft.
replyThis tracks with what I has seem elsewhere. I don't have the details handy now, but the communication system used for long range handoffs for flights above 18,000 ft seems to be what is impacted. Keeping planes below that deck would keep them bouncing more frequently between shorter range towers but at least still tracked and in communication.
replyJet efficiency that low is horrendous though. I suspect a lot of that lower is piston and turboprop, even today.
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