Tan Chun Chiek wrote:
>     This idea of an autopilot landing system just popped up in my mind, and
> other details came almost immediately. I thought why hasn't anyone done it
> before? The runway is something like 10m X 50m. GPS is used for
> longitudinal/latitudinal positioning and preferably velocity measurement,
> the aircraft would have a GPS receiver onboard, and 2 other GPS receivers
> would sit on the both long ends at center of the runway, it's something akin
> to differential GPS to provide better accuracy. Height measurement is done
> by a ultrasonic transceiver or maybe GPS, are they accurate enough? And
> pitch and roll is sensed by a pizeo gyroscope.
>
> How feasible is this concept?

Have you looked at commercially available systems? The MP2000
(http://www.micropilot.com) is capable of autoland. Its expensive and not much
fun to work with, but it gets the job done.

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