NTIA Report TR-87-212

An Updated Noise Model for Use in IONCAP

January 1987

A. D. Spaulding, F. G. Stewart

Abstract: This report presents an updated and improved nosie model designed for use in the HF propagation prediction program, IONCAP. The model has, however, much more general applicability, since the frequency range 10 kHz to 30 MHz is covered. The report give the hisotry, as near as can be determined, of the existing noise routines, and then develops the updated model based on current information. The three noise sources – atmospheric, man-made, and galactic and treated and a more appropriate means of combing these three sources is developed. Examples of the use of the improved model in IONCAP are included and comparisons made with the existing model.

Keywords: atmospheric noise, galactic noise, IONCAP, man-made noise, noise model, overall operating noise threshold

• Title page, Contents, List of Figures, List of Tables

• Chapter 1: Introduction and Background, Chapter 2: Atmospheric Noise

• Chapter 3: Man-made and Galactic Noise, Chapter 4: Combination of the Three Noises

• Chapter 5: Comparisons and Conclusions, Chapter 6: References

• Appendix: Computer Software

Disclaimer: Certain commercial equipment, components, and software are 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.

To request a reprint of this report, contact:
Margaret Luebs, Publications Officer
Institute for Telecommunication Sciences
Voice: (303) 497-3572
info@its.bldrdoc.gov

For technical information concerning this report, contact:
Michael Cotton, Electronics Engineer
Institute for Telecommunication Sciences
Voice: (303) 497-7346
mcotton@its.bldrdoc.gov