Results from the 19- and 28-GHz COMSTAR satellite propagation experiments at Crawford Hill

Strong interactions of radio waves with rain and ice particles in the lower atmosphere significantly affect the performance of earth-space radio links operating at frequencies above 10 GHz. Because of the uncertainties and variabilities in the microstructures of weather phenomena, direct measurements of the effects of rain and ice on radio propagation are needed for the economic design of reliable satellite communications systems. Unique and comprehensive space-earth propagation measurements have been made at Crawford Hill, New Jersey, using the 19- and 28-GHz beacons on the COMSTAR satellites. This paper summarizes these measurements of rain attenuation, rain and ice depolarization, phase and amplitude dispersion, off-path rain-scatter coupling, angle-of-arrival variations, and cloud scintillation. These results provide empirical design data and will serve as checks on theoretical models needed for predicting communication system performance in geographical regions where measurements are not available.

[1]  R. W. Wilson,et al.  A three-radiometer path-diversity experiment , 1970, Bell Syst. Tech. J..

[2]  D. C. Cox,et al.  Dependence of depolarization on incident polarization for 19-GHz satellite signals , 1978, The Bell System Technical Journal.

[3]  D. C. Cox,et al.  COMSTAR experiment: The 19- and 28-GHz receiving electronics for the crawford hill COMSTAR beacon propagation experiment , 1978, The Bell System Technical Journal.

[4]  T. S. Chu,et al.  Rain-induced cross-polarization at centimeter and millimeter wavelengths , 1974 .

[5]  D. Cox,et al.  Observations of rapid changes in the orientation and degree of alignment of ice particles along an Earth‐space radio propagation path , 1979 .

[6]  S. Rice.  Mathematical analysis of random noise , 1944 .

[7]  T. S. CHU,et al.  Microwave depolarization of an earth-space path , 1980, The Bell System Technical Journal.

[8]  D. Cox,et al.  19 AND 28 GHZ PROPAGATION CONSIDERATIONS AFFECTING SATELLITE COMMUNICATIONS SYSTEM DESIGN , 1980 .

[9]  David R. Cox,et al.  Rain Attenuation Statistics from a 19 and 28 GHz COMSTAR Beacon Propagation Experiment: One Year Cumulative Distributions and Relationships Between the Two Frequencies , 1979, IEEE Trans. Commun..

[10]  D. C. Cox,et al.  Some observations of anomalous depolarization on 19 and 12 GHz earth-space propagation paths , 1977 .

[11]  Robert D. Briskman.  The Comstar program , 1977 .

[12]  David R. Cox,et al.  Measurements and Prediction of the Polarization-Dependent Properties of Rain and Ice Depolarization , 1981, IEEE Trans. Commun..

[13]  P. Henry,et al.  Measurement and frequency extrapolation of microwave attenuation statistics on the earth-space path at 13, 19, and 30 GHz , 1975 .

[14]  D. Cox,et al.  Some results from 19 and 28 GHz Comstar beacon propagation experiments , 1978 .

[15]  D. Cox,et al.  Measured bounds on rain-scatter coupling between space-earth radio paths , 1982 .

[16]  D. Cox,et al.  Ice depolarization statistics for 19-GHz satellite-to-earth propagation , 1980 .

[17]  D. C. Cox,et al.  Some effects of measurement errors on rain depolarization experiments , 1975, The Bell System Technical Journal.

[18]  R. W. England,et al.  COMSTAR experiment: The crawford hill 7-meter millimeter wave antenna , 1978, The Bell System Technical Journal.

[19]  D. Gray,et al.  Earth-space path diversity: Dependence on base line orientation , 1973 .

[20]  D. C. Cox,et al.  Attenuation and depolarization by rain and ice along inclined radio paths through the atmosphere at frequencies above 10 GHz , 1979 .

[21]  A. J. Rustako.  An earth-space propagation measurement at crawford hill using the 12-GHz CTS satellite beacon , 1978, The Bell System Technical Journal.

[22]  D. Cox,et al.  Properties of attenuating and depolarizing atmospheric hydrometeors measured on a 19-GHz earth-space radio path , 1980 .

[23]  David C. Hogg,et al.  The role of rain in satellite communications , 1975, Proceedings of the IEEE.

[24]  D. C. Cox,et al.  COMSTAR experiment: The 19-GHz receiving system for an interim COMSTAR beacon propagation experiment at crawford hill , 1978, The Bell System Technical Journal.

[25]  Robert K. Crane,et al.  Propagation phenomena affecting satellite communication systems operating in the centimeter and millimeter wavelength bands , 1971 .

[26]  D. C. Cox,et al.  Observations of cloud‐produced amplitude scintillation on 19‐ and 28‐GHz earth‐space paths , 1981 .

[27]  S. H. Lin,et al.  Rain attenuation on earth-satellite paths — summary of 10-year experiments and studies , 1980, The Bell System Technical Journal.

[28]  L. Ippolito,et al.  Radio propagation for space communications systems , 1981, Proceedings of the IEEE.

[29]  Antenna beamwidth independence of measured rain attenuation on a 28-GHz Earth-space path , 1981 .

[30]  R. Wilson,et al.  Sun tracker measurements of attenuation by rain at 16 and 30 GHz , 1969 .