Frank G. Stewart, Leslie A. Berry, Charles M. Rush, and Vaughn L. Agy

Abstract: A radio propagation prediction computer code has been developed to permit rapid simulation of HF air-to-ground telecommunication circuits. This prediction program provides estimates of both skywave and groundwave HF propagation parameters. The skywave and groundwave propagation parameters can be obtained for radio circuits with transmitters and receivers on the surface of the earth or with one or both ends of the circuit elevated up to 50 km. When a large number of circuits in a given area are simulated for a single time, the program is an order of magnitude faster than its predecessors. This report provides a description of the air-to-ground HF propagation prediction program as well as illustrations of the results obtained from the program.

Keywords: air-to-ground propagation; groundwave propagation; HF predictions; ionospheric propagation; propagation predictions; skywave propagation

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at ITSinfo@ntia.gov or 303-497-3572.

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