Accession Number:

AD0673142

Title:

TROPICAL PROPAGATION RESEARCH

Descriptive Note:

Semiannual rept. no. 9, 1 Jan-30 Jun 1967

Corporate Author:

ATLANTIC RESEARCH CORP ALEXANDRIA VA JANSKY AND BAILEY ENGINEERING DEPT

Personal Author(s):

Report Date:

1967-07-31

Pagination or Media Count:

168.0

Abstract:

This is the ninth semiannual report of a research project to study radio propagation in tropical areas with heavy vegetation. The experimental results reported here are from the first series of Thailand Area 2. The test area, which receives about 90 inches of rainfall annually, is covered with extremely thick jungle. Graphs are presented of basic transmission loss as a function of distance out to 1.4 miles for frequencies of 25, 50, 100 and 250 Mc s using different transmitting antenna heights, polarizations and transmission paths. The receiving antenna height is fixed at 6 feet. Certain of these tests are compared with identical ones made previously in the jungles near Pak Chong, Thailand, Area 1, where the vegetation is significantly lower and less dense. The climate in the test area is also described and compared with the climate at Area 1.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE