Millimeter-Wave Propagation in Moist Air: Model versus Path Data,

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Abstract:

A practical atmospheric millimeter-wave propagation model MPM is updated and tested with experimental data from horizontal, line-of-sight links when there is no precipitation. The MPM computer program predicts attenuation and delay properties of moist air over ranges in frequency from 1 to 1000 GHz and in height from 0 to 30 km. Input variables are radio path distributions of pressure, temperature, relative humidity, and a suspended droplet concentration simulating haze and fog conditions. Terrestrial path data from millimeter-wave propagation experiments, including those from a 27 km link operated at 11.4, 28.8, and 96.1 GHz by the Institute for Telecommunication Sciences ITS, have been analyzed. Calibrated mean signal levels permitted studies of water vapor losses. In addition, a spectral analysis was performed of clear-air scintillations caused by turbulence. In general, good agreement is obtained with the MPM for test frequencies up to 430 GHz. Author

Author(s):
Liebe, H. J. ; Allen, K. C. ; Hand, G. R. ; Espeland, R. H. ; Violette, E. J.
Author Organization(s):
NATIONAL TELECOMMUNICATIONS AND INFORMATION ADMINISTRATION BOULDER CO
Pagination:
0048

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NTIA-85-171, ARO-21677.1-GS
Contract/Grant Number(s):
MIPR-ARO-111-85
Monitor Series:
21677.1-GS
 Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.1.2_Wireless Transmission; JCA_6.3.3_Spectrum Management; JCA_6.1_Information Transport; JCA_5_Command and Control; JCA_1.2.7_Experimentation; JCA_6.3_Net Management; JCA_5.3_Planning; JCA_1.3_Human Capital Management; JCA_1_Force Support; JCA_1.3.2_Personnel Management
Modernization Areas:
Directed Energy; Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*PROPAGATION, *ATMOSPHERE MODELS, *SCINTILLATION, COMPUTER PROGRAMS, FREQUENCY, INPUT, PATHS, TURBULENCE, MILLIMETER WAVES, VARIABLES, FOG, SIGNALS, DELAY, ATTENUATION, CLEAR AIR TURBULENCE, TELECOMMUNICATIONS, LOSSES, CALIBRATION, MEAN, EARTH(PLANET), SPECTRUM ANALYSIS, HUMIDITY, HAZE, WATER VAPOR, HIGH HUMIDITY
Field(s)/Group(s):
Atmospheric Physics
Report Date:
1985 Mar 01