71–80 of 197 posts
A valuable part of the ADS-B out mandate is that planes even as small as mine (a.k.a. tiny) can cheaply (<200$US) pick up ADS-B in and display it on a consumer tablet. My private airplanes now have pseudo radar. Not every airplane in the air is broadcasting, but most are. This is a huge safety win. Almost without exception I'll see airplanes on my tablet long before I have visual on them.
The Kessler syndrome is when collisions between objects cause a cascade in which each collision generates space debris that increases the likelihood of further collisions.
Earlier quoted context omitted.
Won’t they have to before takeoff? Or will that not be a requirement?
Drug smuggling planes might not be in full compliance with every single regulation.
When the Kessler syndrome occurs, all transportation will grind to a halt. The Kessler syndrome is when collisions between objects cause a cascade in which each collision generates space debris that increases the likelihood of further collisions. https://en.wikipedia.org/wiki/Kessler_syndrome
A lot of comments seem to be about spoofing. Remember that there are multiple humans in the loop -- experienced pilots and experienced air traffic controllers -- and multiple levels of redundancy. Pilots have access to barometric altitude, radar altitude, traditional VHF navaids, TCAS-issued resolution advisories (based on directional antennas, not GPS)... in addition to GPS. Air traffic controllers have primary rada…
Incidentally, I am happily surprised that that never seems to happen. One could so easily create so much chaos at an airport... There is no authentication whatsoever.
I worked for a firm, which studied satellite navigation and implementation for air traffic control, guidance, safety, and ILS. I don't think that will ever happen. There are huge gaping issues with GPS, both WAAS and GBAS. It's very unreliable, especially in bad weather. The old-school RF tower and ILS, which used Carrier frequency pairings by the runway, are way more reliable and propagate bad weather while guiding…
What do you mean by this? You sound pretty knowledgeable, so you must know that it's simply not possible for the GPS signal to have latency or lag.
When the Kessler syndrome occurs, all transportation will grind to a halt. The Kessler syndrome is when collisions between objects cause a cascade in which each collision generates space debris that increases the likelihood of further collisions. https://en.wikipedia.org/wiki/Kessler_syndrome
GPS satellites are in geosynchronous orbit, far above any threat of Kessler syndrome and we won't have nearly enough material in orbit that occlusion of the satellites would become a problem for centuries, if ever.
There's a legitimate concern that over-reliance on GPS will cause massive financial and loss of life damage in the civilian sector if it's ever denied through jamming or kinetic attacks or solar storm etc.
A lot of comments seem to be about spoofing. Remember that there are multiple humans in the loop -- experienced pilots and experienced air traffic controllers -- and multiple levels of redundancy. Pilots have access to barometric altitude, radar altitude, traditional VHF navaids, TCAS-issued resolution advisories (based on directional antennas, not GPS)... in addition to GPS. Air traffic controllers have primary rada…
> buying an aviation radio off the shelf and just chatting on the frequency or issuing fake clearances if you want to be a mass murderer Incidentally, I am happily surprised that that never seems to happen. One could so easily create so much chaos at an airport... There is no authentication whatsoever.
When the Kessler syndrome occurs, all transportation will grind to a halt. The Kessler syndrome is when collisions between objects cause a cascade in which each collision generates space debris that increases the likelihood of further collisions. https://en.wikipedia.org/wiki/Kessler_syndrome
GPS satellites are in geosynchronous orbit, far above any threat of Kessler syndrome and we won't have nearly enough material in orbit that occlusion of the satellites would become a problem for centuries, if ever.
(though i agree that kessler concerns are overblown.)