Dr. Anthony C. Riddle received his Ph.D. in electrical engineering from Stanford University, and spent much of his career doing radio astronomy and dealing with both signals in noise and noise as a signal. He died in December 2004, seven years after “retiring” from CIRES. We coauthors, who worked with him for many years at NOAA’s Aeronomy Laboratory and still make use of his computer code, datasets, and scientific results, miss Tony’s energetic and rigorous approach to data analysis and quality control, his creativity, and most of all his ready and good-humored conversation. This research was supported by grants from NOAA’s Office of Global Programs to NOAA’s Earth System Research Laboratory.
Barth, M. F., , Chadwick R. B. , , and van de Kamp D. W. , 1994: Data processing algorithms used by NOAA’s wind profiler demonstration network. Ann. Geophys., 12, 518–528.
Carter, D. A., , Gage K. S. , , Ecklund W. L. , , Angevine W. M. , , Johnston P. E. , , Riddle A. C. , , Wilson J. , , and Williams C. R. , 1995: Developments in UHF lower tropospheric wind profiling at NOAA’s Aeronomy Laboratory. Radio Sci., 30, 977–1001.
Chang, J. L., , Avery S. K. , , Riddle A. C. , , Palo S. E. , , and Gage K. S. , 1997: First results of tropospheric gravity wave momentum flux measurements over Christmas Island. Radio Sci., 32, 727–748.
DiFranco, J. V., , and Rubin W. L. , 1980: Radar Detection. Artech House, 654 pp.
Fukao, S., , Wakasugi K. , , Sato T. , , Tsuda T. , , Kimura I. , , Takeuchi N. , , Matsuo M. , , and Kato S. , 1985: Simultaneous observation of precipitating atmosphere by VHF band and C/Ku band radars. Radio Sci., 20, 622–630.
Hildebrand, P. H., , and Sekhon R. S. , 1974: Objective determination of the noise level in Doppler spectra. J. Appl. Meteor., 13, 808–811.
Ishihara, M., , Kato Y. , , Abo T. , , Jobayashi K. , , and Izumikawa Y. , 2006: Characteristics and performance of the operational wind profiler network of the Japan Meteorological Agency. J. Meteor. Soc. Japan, 84, 1085–1096.
Petitdidier, M., , Sy A. , , Garrouste A. , , and Delcourt J. , 1997: Statistical characteristics of the noise power spectral density in UHF and VHF wind profilers. Radio Sci., 32, 1229–1247.
Riddle, A. C., 1990: MSTCOM version 8.6. University of Colorado.
Riddle, A. C., 1992: Removal of sea clutter, radio interference and other artifacts from profiler spectra. Solar-Terrestrial Energy Program: Proceedings of the Fifth Workshop on Technical and Scientific Aspects of MST Radar, B. Edwards, Ed., University of Illinois, 413–417.
Riddle, A. C., , Gage K. S. , , Balsley B. B. , , Ecklund W. L. , , and Carter D. A. , 1989: Poker Flat MST radar data bases. NOAA Tech. Memo. ERL AL-11, 137 pp.
Vaisala Oyj, 2004: Wind Profiling: The History, Principles, and Applications. Vaisala Inc., 59 pp.
Wakasugi, K., , Mizutani A. , , Matsuo M. , , Fukao S. , , and Kato S. , 1986: A direct method for deriving drop-size distribution and vertical air velocities from VHF Doppler radar spectra. J. Atmos. Oceanic Technol., 3, 623–629.
Weber, B. L., , and Wuertz D. B. , 1990: Comparison of rawinsonde and wind profiler radar measurements. J. Atmos. Oceanic Technol., 7, 157–174.
Williams, C. R., , and Gage K. S. , 2009: Raindrop size distribution variability estimated using ensemble statistics. Ann. Geophys., 27, 555–567.
Woodman, R. F., , and Guillen A. , 1974: Radar observations of winds and turbulence in the stratosphere and mesosphere. J. Atmos. Sci., 31, 493–505.