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During the late fall of 1985 and the winter of 1986 test flights were conducted at the Federal Aviation Administration (FAA) Technical Center's Heliport at Atlantic City International Airport, N.J. The purpose of these flights was to verify signal coverage of the Microwave Landing System (MLS) collocated at the heliport. Other activities included the measurement of the signal characteristics of the Hazeltine Model 2400 MLS which was installed at the heliport. Elevation and azimuth course widths were determined and, using classical Z transform techniques, statistical estimates of control motion noise and path following error were obtained. These estimates were compared with the FAA Standard for Interoperability and Performance Requirements of MLS. Results obtained were excellent. Tolerance limits were consistently met. The data revealed that wide beam width antenna systems when installed at heliports can meet specification tolerances contained in the FAA specification for MLS Interoperability and Performance Requirements.
This document contains information on the utilization of the Microwave Landing System (MLS) at heliports and helipads. It was designed to familiarize operators and users with the features of the MLS and its capabilities in supporting heliport operations. For this reason the major sections of the document present information on MLS siting, operational characteristics, selecting and specifying an MLS system. In addition, other sections provide additional MLS information to familiarize pilots with MLS avionics, pilot training requirements and aircraft performance considerations. (Author).