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Development of a portable precision landing systemA portable, tactical approach guidance (PTAG) system, based on a novel, X-band, precision approach concept, was developed and flight tested as a part of NASA's Rotorcraft All-Weather Operations Research Program. The system is based on state-of-the-art X-band technology and digital processing techniques. The PTAG airborne hardware consists of an X-band receiver and a small microprocessor installed in conjunction with the aircraft instrument landing system (ILS) receiver. The microprocessor analyzes the X-band, PTAG pulses and outputs ILS compatible localizer and glide slope signals. The ground stations are inexpensive, portable units, each weighing less than 85 lb, including battery, that can be quickly deployed at a landing site. Results from the flight test program show that PTAG has a significant potential for providing tactical aircraft with low cost, portable, precision instrument approach capability.
Document ID
19870004877
Document Type
Technical Memorandum (TM)
Authors
Davis, T. J. (NASA Ames Research Center Moffett Field, CA, United States)
Clary, G. R. (NASA Ames Research Center Moffett Field, CA, United States)
Macdonald, S. L. (Sierra Nevada Corp. Reno, United States)
Date Acquired
September 5, 2013
Publication Date
July 1, 1986
Subject Category
AIRCRAFT COMMUNICATIONS AND NAVIGATION
Report/Patent Number
NAS 1.15:88247
A-86227
NASA-TM-88247
Funding Number(s)
PROJECT: RTOP 505-66-51
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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