Accession Number:

ADP007451

Title:

Land Mobile Radio Propagation to Satellites,

Descriptive Note:

Corporate Author:

MOTOROLA INC SCHAUMBURG IL

Personal Author(s):

• Davidson, Allen

Report Date:

1992-02-01

Pagination or Media Count:

20.0

Abstract:

The excess path loss statistics averaged through a 50 Hz bandwidth filter from a satellite to a land mobile platform are shown to be described by two modes, the signal shadowed mode and the two path summation mode. The latter is characterized by a mean near 0 dB and a standard deviation near 2 dB, and the former by a mean that is near 15 dB in the steel canyons of the city, 12 dB in an urban environment, 6.5 dB in a suburban environment and a standard deviation near 5 dB. The characteristics of the signal shadowed mode are very much like traditional terrestrial multipath land mobile propagation. The percent of time spent in each mode is a function of elevation, and varies from 0 percent two path summation when the elevation is near 0 degrees, approaching 100 percent when the elevation is near 90 degrees.

Descriptors:

• *ARTIFICIAL SATELLITES
• *BANDWIDTH
• *PROPAGATION
• CANYONS
• ELEVATION
• ENVIRONMENTS
• FILTERS
• FUNCTIONS
• MEAN
• MOBILE
• PATHS
• PLATFORMS
• PROPAGATION
• SIGNALS
• STANDARDS
• STATISTICS
• STEEL
• TIME
• URBAN AREAS
• RADIO BEAMS
• RADIO RECEPTION

Subject Categories:

• Unmanned Spacecraft
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE