January 1971 | NTIA Technical Memo OT ITSTM 19
Interference predictions for VHF/UHF air navigation aids (Supplement to IER 26-ITSA 26 and ERL 138-ITS 95) OT/lTSTM 19
G. D. Gierhart; M. E. Johnson
Abstract: This report supplements information previously developed by the authors on interference predictions for VHF/UHF air navigation aids, Included are (a) radiation patterns needed to adapt curves previously developed for the Instrument Landing System (ILS) Localizer and Tactical Air Navigation (TACAN) to new equipment types, (b) comparisons of the propagation models used for predictions made from 1962 to the present, (c) propagation information in a different form, i. e., attenuation greater than free space for Distance Measuring Equipment (DME), TACAN and VHF Omnirange (VOR), (d) DME, TACAN and VOR service volume without interference curves for equipment configurations not previously considered, and (e) an errata list for earlier ESSA Technical Reports.
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.