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As the aircraft attacks of September 11, 2001 unfolded at the World Trade Center, virtually maximum augmented GPS positioning quality for the entire daylight period was provided to the geographic coordinates for the World Trade Center.
GPS position quality is strongly affected by the number of GPS satellites visible to a GPS receiver and the orbital geometry of GPS satellites with respect to a GPS receiver. Augmented GPS signal receivers and Flight Management Systems that utilize augmented GPS signals for navigation and positioning purposes were scheduled to be contained by American and United airlines Boeing 757s and 767s by 2000.
"Factors that can degrade the GPS signal and thus affect accuracy include the following: Number of satellites visible - The more satellites a GPS receiver can "see," the better the accuracy; Satellite geometry/shading - This refers to the relative position of the satellites at any given time. Ideal satellite geometry exists when the satellites are located at wide angles relative to each other. Poor geometry results when the satellites are located in a line or in a tight grouping."
It has always struck me that the morning of 9/11 was an unusally
clear day, not a cloud in the sky. I had always thought it was so
that all the film coverage would be particularly high quality. perhaps
the OP has a point there.
Originally posted by habu71BTW, as a technical fact, the accuracy is always there for the military or USG GPS receiver, it is intentionally degraded for civilian receivers....
Originally posted by Reheat
And while you're at it you should explain how easy it is to implement remote control in mechanical non fly-by-wire flight control systems such as are on B-757/767 aircraft.
The structure incorporates new materials such as improved aluminium alloys, graphite composites and hybrid Kevlar graphite composites, which give enhanced strength, durability and longevity.
The configuration of a commercial 767 for the tanker transport role involves the installation of additional pumps and auxiliary fuel tanks together with the fuel distribution lines below the floor of the main cabin, leaving the main cabin free for cargo, passenger or both cargo and passenger transportation. The concept allows simultaneous refuelling and airlift operations or successive refuelling and airlift missions.
In the cargo configuration, the aircraft can transport 19 standard military 463-L pallets; in the passenger configuration, 200 passengers can be accommodated; and in the Combi configuration ten cargo pallets and 100 passengers can be carried.
8. It is possible to create an incident which will demonstrate convincingly that a Cuban aircraft has attacked and shot down a chartered civil airliner enroute from the United States to Jamaica, Guatemala, Panama or Venezuela. The destination would be chosen only to cause the flight plan route to cross Cuba. The passengers could be a group of college students off on a holiday or any grouping of persons with a common interest to support chartering a non-scheduled flight.
a. An aircraft at Eglin AFB would be painted and numbered as an exact duplicate for a civil registered aircraft belonging to a CIA proprietary organization in the Miami area. At a designated time the duplicate would be substituted for the actual civil aircraft and would be loaded with the selected passengers, all boarded under carefully prepared aliases. The actual registered aircraft would be converted to a drone.
b. Take off times of the drone aircraft and the actual aircraft will be scheduled to allow a rendezvous south of Florida. From the rendezvous point the passenger-carrying aircraft will descend to minimum altitude and go directly into an auxiliary field at Eglin AFB where arrangements will have been made to evacuate the passengers and return the aircraft to its original status. The drone aircraft meanwhile will continue to fly the filed flight plan. When over Cuba the drone will being transmitting on the international distress frequency a "MAY DAY" message stating he is under attack by Cuban MIG aircraft. The transmission will be interrupted by destruction of the aircraft which will be triggered by radio signal. This will allow ICAO radio
Originally posted by Swampfox46_1999
reply to post by OmegaPoint
And yet, a simple viewing of the photos taken from the side would show you that your tanker theory is wrong.