The Prediction of Field Strength in the Frequency Range 30 - 1000 MHz,
BRITISH BROADCASTING CORP TADWORTH (ENGLAND)
Pagination or Media Count:
The BBC is reviewing the results of its past propagation experiments and survey measurements with the aim of refining its prediction methods, hence the data which formed a substantial configuration to Recommendation 370 of the CCIR are being re-examined. This paper reveals the problems facing the review. It refers to the backgrounds of the BBCs involvement in propagation measuremnt at VHF and UHF. Weaknesses in the original data are discussed with a view to improving specifications for future work. The accuracy of prediction is related to the accuracy of measurement as illustrated by an experiment dating to the development period of an interim BBC prediction method for UHF, and the accuracy of the current path loss prediction method is discussed. Possible directions of future development in prediction methods are indicated and the objectives of the BBCs research in this area are outlined.