Tabulations of Propagation Data Over Irregular Terrain in the 230- To 9200-MHZ Frequency Range. Part 1: Gunbarrel Hill Receiver Site

McQuate, P. L.; Harman, J. M.; Barsis, A. P.

doi:10.21236/ad0671271

Cited by 13 publications

(7 citation statements)

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“…Propagation experiments in the 230 to 9200 MHz range conducted over irregular terrain in Colorado are reported by McQuate, Harmanand Barsis (1968). The data for all frequencies were recorded at a single common receiver site located near the summit of Gunbarrel For example, the low losses (plotted high in the figures) shown for paths at d = 27.…”

Section: Gunbarrel Hill Coloradc (R-l)mentioning

confidence: 99%

COMPARISON OF PROPAGATION MEASUREMENTS WITH PREDICTED VALUES IN THE 20 TO 10,000 MHz RANGE

Longley¹,

Reasoner²

1970

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The on of the Research Laboratories is t) study the oceans, inland waters, the lower and r atmosphere, the space environment, and the earth, in search of the under-A 1 ~m .;i~ l ed to provide more useful services in Improving man's prospects for survival v =as nflue by the physical environment. Laboratories contributing to these studies are:Erh nces Laoboratories: Gteomagnetism, seismology, geodesy, and related earth sc ences; quake processes, internal structure and accurate figure of the Earth, and / . dltributi dtthe Earth's mass. Aeronomy Laboratory: Theoretical, laboratory, rocket, and satellite studies of the physical and chemical processes controlling the ionosphere and exosphere of the earth and other planets.Wave Propagation Laboratory: Development of new methods for remote sensing of the geophysical environment; special emphasis on propagation of sound waves, and electromagnetic waves at millimeter, infrared, and optical frequencies.Institute for Telecommunication Sciences: Central federal agency for research and servIces in propagation of radio waves, radio properties of the earth and its atmosphere, nature of radio noise and interference, information transmission and antennas, and methods for the more effective use of the radio spectrum for telecommunications. "Research Flight Facility: Outfits and operates aircraft specially instrumented for research; and meets needs of ESSA and other groups for environmental measurements for aircraft. (Miami, Florida)'• Distr.;ution of This Report is Unlimited

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Section: Gunbarrel Hill Coloradc (R-l)mentioning

confidence: 99%

COMPARISON OF PROPAGATION MEASUREMENTS WITH PREDICTED VALUES IN THE 20 TO 10,000 MHz RANGE

Longley¹,

Reasoner²

1970

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“…From the part II of the compilation in [28], geographical and system data from the radio links were available to be replicated in the predictions of the analyzed models. With such information in hands, the respective 2D terrain profiles were reproduced, reading SRTM [29] elevation bases with the aid of an adaptation of a MATLAB ® script intended to plot elevation maps [30].…”

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confidence: 99%

“…The ridge electrical parameters were estimated from pertinent references, in special [32]: rb = 13 and sb = 5 mS/m. Regarding the vegetation layer, a narrow range of values was first chosen as proper estimates, based on information from [28], as well as the suggestions in [23]. A single pair of values were considered for all runs of the hybrid model: r1 = 1.23 and s = 0.3 mS/m.…”

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confidence: 99%

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On the Use of UTD-Based Models for RF Path Loss Prediction Due to Diffraction on a Forest-Covered Ridge

Costa

Ramirez

Dias

2021

J. Microw. Optoelectron. Electromagn. Appl.

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Irregular terrains covered with forest vegetation represent a challenging scenario for radio planning. A case of particular interest is the one where a forest-covered high hill or mountain is interposed to the link, for which typical diffraction loss models usually apply as good approximations, even disregarding the vegetation influence. Pragmatic approaches to incorporate the forest contribution, such as adding a clutter height, usually improve accuracy a little further. In this scope, this paper assesses the performance of some models based on the Uniform Theory of Diffraction (UTD) for RF path loss prediction in such ridges. Special attention goes to a hybrid model in which the forest is a uniform layer over a wedge that represents the ridge, and its influence is incorporated into the diffraction coefficient. The path loss predictions are compared with measurements from a mountainous region of the USA, and the statistical adherence of the models to the measured data is discussed. Overall, the slightly better performance of the models which incorporate the vegetation influence was confirmed, the hybrid model performing the best for frequencies below 910 MHz.

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“…To validate the model, results of MWFDTD calculations are compared with path loss measurements over irregular terrains in Colorado [3].…”

Section: Moving Window Finite Difference Time Domain (Mwfdtd)mentioning

confidence: 99%

Full Wave Modeling of RF Propagation Between Low-to-the-Ground Antennas

Schuster

Luebbers

2005 IEEE Antennas and Propagation Society International Symposium

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Tabulations of Propagation Data Over Irregular Terrain in the 230- To 9200-MHZ Frequency Range. Part 1: Gunbarrel Hill Receiver Site

Cited by 13 publications

References 0 publications

COMPARISON OF PROPAGATION MEASUREMENTS WITH PREDICTED VALUES IN THE 20 TO 10,000 MHz RANGE

COMPARISON OF PROPAGATION MEASUREMENTS WITH PREDICTED VALUES IN THE 20 TO 10,000 MHz RANGE

On the Use of UTD-Based Models for RF Path Loss Prediction Due to Diffraction on a Forest-Covered Ridge

Full Wave Modeling of RF Propagation Between Low-to-the-Ground Antennas

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