Accession Number : AD0743555

Title :   Evaluation of STOL Modular Instrument Landing System (MODILS).

Descriptive Note : Final rept. May 70-Jul 71,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Adams,Glen D.

Report Date : MAY 1972

Pagination or Media Count : 54

Abstract : The FAA procured two modular instrument landing system (MODILS) ground stations for short take-off and landing (STOL) operational evaluation. MODILS operates at 5.2 GHz (C-band solid-state transmitter), providing localizer and glide slope signals, from a common site, for approach guidance to aircraft equipped with a MODILS receiver. Proportional guidance is provided from 3 degrees to 12 degrees elevation and about plus or minus 30 degrees in azimuth. The pilot may select his glide slope angle in increments of 0.1 degrees, and one of three localizer courses: parallel to runway centerline, 2 degrees skew one side and 6 degrees skew the other side. The pilot may also select his indicator sensitivities. An integral distance measuring equipment (DME) is included which provides readouts to 0.01 nmi. The system provides good quality guidance signals to adequately support Category I type (200-foot decision height) operations. (Author)

Descriptors :   (*GLIDE PATH SYSTEMS, RELIABILITY(ELECTRONICS)), (*SHORT TAKEOFF AIRCRAFT, *INSTRUMENT LANDINGS), C BAND, DISTANCE MEASURING EQUIPMENT, MICROWAVE EQUIPMENT, TRANSMITTER RECEIVERS, AIRCRAFT ANTENNAS, PROPORTIONAL NAVIGATION, FLIGHT TESTING

Subject Categories : V/STOL
      Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE