Technical Evaluation of Dual Input Transponder.
Final rept. Jul 69-May 70,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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The Dual Input Transponder was evaluated to determine if it, in conjunction with upper and lower aircraft antennas, could resolve existing Air Traffic Control Radar Beacon System antenna coverage problems by minimizing aircraft antenna shielding phenomena. Flight tests of the DIT and other comparative transponder-antenna configurations were conducted at the National Aviation Facilities Experimental Center NAFEC, and included several types of manuevers intended to place the test aircraft in numerous shielding attitudes. Results of the test program indicated that the DIT effectively minimized the loss of transponder replies caused by shielding of the antennas and provided essentially uninterrupted antenna coverage. A limited number of tests with two independently operated transponders and two antennas indicated that this configuration resulted in less apparent shielding effects than the DIT system. Author
- Acoustic Detection and Detectors
- Air Navigation and Guidance