RF Coverage analysis methodology as applied to ADS-B design

This paper presents the radiofrequency (RF) coverage analysis methodology used to design and build the radio site layout in support of the Federal Aviation Administration (FAA)´s Automatic Dependent Surveillance - Broadcast (ADS-B) Air Traffic Modernization Program. This layout is optimized to meet system performance, safety, and interference requirements while minimizing the number of radio station sites required for providing RF coverage in the entire airspace of the Unites States. The paper will focus on the analysis performed for selecting the proper RF prediction model that meets FAA´s requirements, and the use of the prediction model for safety of life applications. In addition, it includes the process of designing and applying the radio station siting template for site selection process. The radio station siting template provided the basis for development of computer algorithms that facilitated the selection of radio station sites during the proposal phase of ADS-B program. A discussion on the development of computer algorithm will be provided in this paper.