Accession Number : AD0672069

Title :   THE USE OF GROUNDWAVE TRANSMISSION-LOSS AND INTELLIGIBILITY-TEST DATA TO PREDICT EFFECTIVE RANGE AND PERFORMANCE OF VHF MANPACK RADIOS IN FORESTS.

Descriptive Note : Special technical rept. no. 11,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : Hagn,George H.

Report Date : SEP 1966

Pagination or Media Count : 65

Abstract : The effective range of a VHF manpack radio in a specified environment is a parameter of primary interest to the military user. There are several ways to define effective range. The purposes of this report are (1) to present a discussion of effective range that will lead to a useful and meaningful definition; (2) to discuss the use of transmission-loss data with radio-set data and various performance criteria in regard to effective range; and (3) to present some tentative conclusions about methods of planning for the use of VHF manpack radios in a tropical forest, based upon path-loss data taken in Panama during World War II and more recently in Thailand. A statistical definition of range with confidence bounds is proposed, based upon quality of operation, such as intelligibility scores. (Supplementary information on intelligibility tests is given in Appendix A.) (Author)

Descriptors :   (*WALKIE TALKIES, RANGE(DISTANCE)), VERY HIGH FREQUENCY, TRANSMITTER RECEIVERS, PORTABLE EQUIPMENT, TROPICAL REGIONS, ATTENUATION, RADIO WAVES, INTELLIGIBILITY, VOICE COMMUNICATIONS, RADIO TRANSMISSION, RADIOFREQUENCY POWER, PREDICTIONS, JUNGLES

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE