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Roger M. Wakimoto and Hanne V. Murphey

in the planning stage that in order to sample a number of convergence boundaries, a majority of the observing platforms deployed during IHOP would have to be mobile. For more information about IHOP, the reader is referred to Weckwerth et al. (2004) . a. ELDORA The Electra Doppler Radar (ELDORA) is a 3-cm airborne Doppler radar ( Hildebrand et al. 1994 ) on board a Naval Research Laboratory (NRL) P-3 aircraft. The two antennas scan fore and aft of the normal to the fuselage of

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Roger M. Wakimoto and Hanne V. Murphey

last sounding of <25 min. 3. Surface analysis and the flight track Surface analyses for the six cases are shown in Fig. 1 . The IHOP_2002 field operations plan for convection initiation studies proposed that the intensive observing region was centered on the box pattern flown by the P-3. Accordingly, the mobile ground-based facilities and locations where dropsondes were released were concentrated near the center of the aircraft flight track. A well-defined dryline that developed ahead of a cold

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Edward I. Tollerud, Fernando Caracena, Steven E. Koch, Brian D. Jamison, R. Michael Hardesty, Brandi J. McCarty, Christoph Kiemle, Randall S. Collander, Diana L. Bartels, Steven Albers, Brent Shaw, Daniel L. Birkenheuer, and W. Alan Brewer

repeat the circuit a second time. Instrumentation and aircraft constraints forced adaptations to the original plans, principally because tire problems did not allow the Falcon to fly the second circuit. The NOAA HRDL was specifically designed for probing small-scale dynamic features in the boundary layer and lower troposphere. Operating in the eye-safe infrared portion of the spectrum at 2.02 μ m, the lidar transmits 2-mJ optical pulses at a rate of 200 Hz. The pulse length of 200 ns enables

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John H. Marsham, Stanley B. Trier, Tammy M. Weckwerth, and James W. Wilson

dashed black line in (b), with the dotted line showing the second maximum. Early echoes from cells forming on the intersection of the convergence line and the wave are seen just south of the label “IE3.” (c) Reconstructed RHI from S-Pol southeastward through the wave at 0911 UTC, along the solid yellow lines shown in (a) and (b), with estimated locations of wave crests shown by the black tick marks. Fig . 6. Hovmöller diagram of radar reflectivity from 2° plan

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Lindsay J. Bennett, Tammy M. Weckwerth, Alan M. Blyth, Bart Geerts, Qun Miao, and Yvette P. Richardson

differences in absolute CBL height are mostly due to the sampling characteristics of the remote sensors, as well as the temporal resolution and the details of the algorithms used to define the CBL. Continuous 1° elevation plan position indicator (PPI) scans from the DOW radar revealed a striking evolution of convective features throughout the morning and early afternoon ( Fig. 8 ). The first clear-air signals were observed from 0700 CST, but they had no particular organization ( Figs. 8a,b ). The radar

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