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<br />MARCH 1987
<br />
<br />MARK HEGGLI, ROBERT M. RAUBER AND 1. B. SNIDER
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<br />tegrated vapor are probably within 15% of the true in-
<br />tegrated vapor. The radiometer comparison indicates
<br />that the data are reproducible and the radiometric sys-
<br />tem possesses a high degree of stability. Definitive
<br />studies are still required to evaluate the liquid channel.
<br />These studies are continuing in both SCPP and CaSE.
<br />
<br />Acknowledgments. The Colorado Orographic Seed-
<br />ing Experiment research was supported by National
<br />Science Foundation Grant A TM-8407543. The authors
<br />wish to express their thanks to the many who collected
<br />data and provided comments. Electronic Techniques,
<br />Inc. provided the SCPP rawinsonde measurements.
<br />The contributions of Mr. Dean Newkirk, Mr. Dave
<br />Reynolds, Dr. Arnett Dennis, and Professor Lewis O.
<br />Grant are gratefully acknowledged. Special thanks to
<br />I Bernice Culver for typing the manuscript and Marion
<br />Haurwitz for developing programs used for this com-
<br />parison.
<br />
<br />REFERENCES
<br />
<br />Guiraud, F. 0., J. Howard and D. C. Hogg, 1979: A dual.channel
<br />microwave radiometer for measurement of precipitable water
<br />vapor and liquid. IEEE Trans. Geosci. Electron., GEI7, 129-
<br />136.
<br />Heggli, M. F., 1985: The role of microwave radiometry in weather
<br />modification research. Fourth WMO Scientific Con! on Wea.
<br />Mod.. Honolulu, HI, WMO, 157-162.
<br />-, and D. Reynolds, 1985: Radiometric observations of super.
<br />cooled liquid water within a split front over the Sierra Nevada.
<br />J. Climate Appl. Meteor.. 24, 1258-1261.
<br />Hogg, D. c., F. O. Guiraud, J. B. Snider, M. T. Decker and E. R.
<br />
<br />~,
<br />
<br />
<br />Westwater, 1983: A steerable dual-channel microwave radi-
<br />ometer for measurement of water vapor and liquid in the tro-
<br />posphere. J. Appl. Meteor.. 22, 789-806.
<br />Holroyd, E. W., and A. B. Super, 1984: Winter spatial and temporal
<br />variations in supercooled liquid water over the Grand Mesa,
<br />Colorado. Ninth Con! on Wea. Mod., Park City, UT, Amer.
<br />Meteor. Soc., 59-60.
<br />Long, A. 8., and P. A. Walsh, 1984: Radiometric detection and mea.
<br />surement of liquid water in winter orographic clouds. Ninth
<br />Con[ on Wea. Mod., Park City, UT, Amer. Meteor. Soc., 55-
<br />56.
<br />Nordahl, 1. S., 1982: Response to problems in reported NWS ra.
<br />winsonde relative humidity data arise again. Bull. Amer. Meteor.
<br />Soc., 63, 12. P 1394.
<br />Rauber, R. M., D. Feng, 1. O. Grant and J. B. Snider, 1986: The
<br />characteristics and distribution of cloud water over the moun-
<br />tains of northern Colorado during wintertime storms. Part I:
<br />Temporal variations. J. Climate Appl. Meteor., 25,468-488.
<br />Richner, H., and P. D. Phillips, 1981: Reproducibility ofVIZ radio-
<br />sonde data and some sources of error. J. Appl. Meteor.. 20,954-
<br />962.
<br />Sassen, K., R. M. Rauber and J. B. Snider, 1986: Multiple remote
<br />sensor observations of supercooled liquid water in a winter storm
<br />at Beaver, Utah. J. Climate Appl. Meteor.. 25, 825-834.
<br />Shaffer, R. W., 1982: Problems in reported NWS rawinsonde relative
<br />humidity data arise again. Bull. A mer. Meteor. Soc., 63, 12.
<br />p1394.
<br />Westwater, E. R., 1972: Microwave emission from clouds. NOAA
<br />Tech. Rep., ERL-219-WPL-18, NOAA Environmental Research
<br />Laboratory, Boulder, CO 80303.
<br />-, 1978: The accuracy of water vapor and cloud liquid determi.
<br />nation by dual.frequency ground-based microwave radiometry.
<br />Radio Sci.. 13, 677-685.
<br />-, and F. O. Guiraud, 1980: Ground-based microwave radiometric
<br />retrieval of precipitable water vapor in the presence of clouds
<br />with high liquid content. Radio Sci.. 15,947-957.
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