CATEGORY III ALTITUDE MONITOR.
SIERRA RESEARCH CORP BUFFALO N Y
Pagination or Media Count:
The report covers the additional work on the Altitude Monitor. The objectives called for 1 simultaneous altitude readout in both 9ground station and aircraft, 2 reduction of airborne equipment weight, 3 two equipment designs, one providing airborne and ground readout for commercial aircraft, the other ground readout only for light aircraft, 4 higher accuracy of altitude readout, and 5 gono-go airborne indication. Results were as follows 1 ground readout was accomplished through the addition of an airborne FSR which returns the transmitted signal 30 mc from its original frequency, 2 airborne equipment weight was reduced to less than 5-12 lbs., 3 airborne equipment was miniaturized for light aircraft, 4 gono-go airborne indication was designed into the airborne computer and flight-tested, and 5 the feasibility of precise inner marker capability was demonstrated. The two major problems were 1 doppler effect and 2 false airborne triggering, presumably due to ground radar interference. It was shown that the doppler effect is overcome by increasing the receiver bandwidth to 4 kc and that false airborne triggering is eliminated through raising the modulating frequency.
- Flight Control and Instrumentation
- Air Navigation and Guidance