A short guide to HF ground wave circuit availability
Abstract
Atmospheric noise statistics presented by the CCIR were applied to the problem of circuit availability of an air to ground HF ground wave voice communications system. The best and worst case noise conditions were considered for a location in the United Kingdom. Curves are presented showing the expected ranges of the system in terms of its stipulated circuit availability. Means are provided whereby the results may be applied to air to ground or ground to ground systems generally, for the purpose of performance prediction. Ground wave radio propagation is reviewed and the statistical concept of circuit availability is explained in terms of the underlying noise characteristics. The limitations to the scope of the report are discussed and attention is drawn to problem areas; recommendations for further work are made.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- June 1977
- Bibcode:
- 1977STIN...7830504H
- Keywords:
-
- Atmospherics;
- Ground Wave Propagation;
- High Frequencies;
- Voice Communication;
- Availability;
- Circuits;
- Performance Prediction;
- Communications and Radar