deltayankee wrote:
Not if you average over a few successive readings.
In any case we are talking about the final approach. High buildings and ground features like the Yosemite half dome will not come as surprises.
Although I initially agreed to this I now have to drop it. Remember James Bond in GoldenEye from 1995? It opens with Bond breaking into a chemical weapons plant, then driving a motorcycle off a cliff and skydiving to catch a diving airplane.
Of course it's totally insane but the runway is not. Landing on this runway would make a perfectly working RA to read 1950 one moment and -2 the next moment, assuming the cliff is steep enough.