Accession Number : AD0781859

Title :   Development and Test of Low Impact Resistance Structures. Volume II. Interference of Low Impact Resistance Structures with Instrument Landing System (ILS) Signals.

Descriptive Note : Final rept. on phase 1,

Corporate Author : ASE INC PENNSAUKEN NJ

Personal Author(s) : Spencer, Roy C.

Report Date : FEB 1974

Pagination or Media Count : 89

Abstract : Scattering of radiation by the ALS light supports in front of the Course Antenna will not result in course errors. There are three reasons for this conclusion: (1) The forward scattering from the poles is weak. (2) Each pole is so close to the center line that no detectable phase change could be noted by an incoming plane. (3) The symmetric arrangement of poles cancels out any asymmetrical affect of one pole. (Modified author abstract)

Descriptors :   *INSTRUMENT LANDINGS, SUPPORTS, STRUCTURAL COMPONENTS, ELECTROMAGNETIC INTERFERENCE, ELECTROMAGNETIC SCATTERING, APPROACH LIGHTS, ERRORS.

Subject Categories : Air Navigation and Guidance
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE