High resolution 95 GHz radar reflectivity and Doppler images of tornadoes

Andrew L. Pazmany, David J. McLaughlin, Howard B. Bluestein, Christopher C. Weiss

Research output: Contribution to conferencePaper

Abstract

During the spring of 1999, engineers from the University of Massachusetts (UMass) Microwave Remote Sensing Laboratory (MIRSL) and meteorologists from the University of Oklahoma (OU) School of Meteorology collected the highest resolution radar reflectivity and Doppler velocity images of tornadoes to date. Image sequences were captured from three tornadoes (including the May 3rd, 1999 Oklahoma City tornado) using the UMass truck mounted 95 GHz (3-mm wavelength) polarimetric Doppler radar system. The radar resolved spatial variations as fine as 12 by 12 by 15 m from a range of 4 km with a 4 ft diameter Cassegrain antenna and by transmitting 100 ns long pulses. Using a Polarization Diversity Pulse Pair (PDPP) sequence, the radar unambiguously measured the Doppler velocity field in tornado eye-walls. For the first time, the PDPP technique measured radial wind speeds in high wind and high shear conditions where conventional pulse pair techniques broke down. This paper documents our measurement and signal processing techniques and presents images revealing previously unseen high-resolution structures and dynamics inside tornadoes.

Original languageEnglish
Pages2498-2500
Number of pages3
StatePublished - 2000
Event2000 Internaitonal Geoscience and Remote Sensing Symposium (IGARSS 2000) - Honolulu, HI, USA
Duration: Jul 24 2000Jul 28 2000

Conference

Conference2000 Internaitonal Geoscience and Remote Sensing Symposium (IGARSS 2000)
CityHonolulu, HI, USA
Period07/24/0007/28/00

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  • Cite this

    Pazmany, A. L., McLaughlin, D. J., Bluestein, H. B., & Weiss, C. C. (2000). High resolution 95 GHz radar reflectivity and Doppler images of tornadoes. 2498-2500. Paper presented at 2000 Internaitonal Geoscience and Remote Sensing Symposium (IGARSS 2000), Honolulu, HI, USA, .