Prudent frequency management through accurate prediction of skywave field strengths

Wang, J.C.H.

doi:10.1109/11.30837

Cited by 6 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The detailed calculation procedures are given in the ITU [1982] work. Wang [1985Wang [ , 1989a reported that this method offers reasonable accuracy when applied to temperate latitudes. When applied to low-latitude areas (e.g., Puerto Rico), it displays a tendency to underestimate.…”

Section: Region 2 Methodsmentioning

confidence: 98%

“…Nighttime yearly median value of field strength at this hour is generally used to determine sky-wave service area of a station, while the upper decile value is used to determine interference level. The difference between upper decile and median values varies with latitude from 6 dB in the tropical areas [Davies, 1990] to 12 dB or more at high latitudes [Wang, 1989a].…”

Section: Amplitude Distributionsmentioning

confidence: 99%

“…This is left for future work. It should be mentioned that results of the Japanese mobile experiments between Japan and several receiving points located in the Indian Ocean situated to the west of Australia follow the Wang method closely [Wang, 1989a], and no correction factor was needed. It should also be mentioned that HF field strengths observed in this part of the world are higher than those observed elsewhere as well (S. G. Kingan, personal communication, 1993).…”

Section: Accuracy In Different Regionsmentioning

confidence: 99%

See 2 more Smart Citations

An objective evaluation of available LF/MF sky‐wave propagation models

Wang¹

1999

Radio Science

View full text Add to dashboard Cite

Abstract. This paper presents results of an extensive comparative study in which all four major field-strength prediction methods are compared with measured data. The most recent data bank has been used. These methods are analyzed in detail. Factors affecting sky-wave propagation are discussed. Some historical background is also presented. IntroductionThe purpose of this paper is to evaluate the currently used LF/MF sky-wave propagation models. A brief historical background, including some major worldwide field-strength measurement campaigns, is presented in section 2. The most up-to-date and largest data bank has been organized and studied and used in this study. Factors affecting sky-wave propagation and some observed phenomena are discussed in section 3. Currently used methods for predicting field strengths are qualitatively discussed in section 4 and quantitatively compared in section 5. Historical Background: Six Decades of Concerted EffortsIn this section a brief historical background behind the currently used field-strength prediction models is given. This is important for two reasons: to document some valuable historical facts and, more importantly, to help the users to select the right propagation models for their particular applications. The two curves were formally adopted at the 1938 Early International Efforts and the Cairo

show abstract

Section: Region 2 Methodsmentioning

confidence: 98%

Section: Amplitude Distributionsmentioning

confidence: 99%

Section: Accuracy In Different Regionsmentioning

confidence: 99%

See 1 more Smart Citation

An objective evaluation of available LF/MF sky‐wave propagation models

Wang¹

1999

Radio Science

View full text Add to dashboard Cite

show abstract

Radio Propagation at LF , MF , and HF

Wang

2003

Wiley Encyclopedia of Telecommunications

View full text Add to dashboard Cite

In this article, different modes of propagation are presented first. Factors affecting ground‐wave propagation are discussed. Propagation models and available software are presented and compared. The solar–terrestrial system, which forms the sky‐wave propagation environment, is described. Factors affecting sky‐wave propagation are discussed in detail. Different propagation models are discussed qualitatively and compared quantitatively. Definitions of the most important terms relating to propagation are given in Section 6.

show abstract

Propagation of Broadcast Transmissions

Wang

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

View full text Add to dashboard Cite

The sections in this article are Ground‐Wave Propagation The Sky‐Wave Propagation Environment Sky‐Wave Propagation at LF and MF Sky‐Wave Propagation at High Frequency Space‐Wave Propagation at VHF and UHF Acknowledgments and Closing Remarks Glossary

show abstract

Prudent frequency management through accurate prediction of skywave field strengths

Cited by 6 publications

References 10 publications

An objective evaluation of available LF/MF sky‐wave propagation models

An objective evaluation of available LF/MF sky‐wave propagation models

Radio Propagation at LF , MF , and HF

Propagation of Broadcast Transmissions

Contact Info

Product

Resources

About