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The deployment of measurement equipment in passenger aircraft for the observation of atmospheric trace constituents is described. The package of automated instruments that is installed in a one-ton-capacity aircraft freight container positioned in the forward cargo bay of a Boeing 767 ER can...
This paper deals with the recovery of Doppler velocities in the presence of range overlaid echoes. Transmitted pulses are phase shifted to tag the echoes from scatterers, which are separated by the unambiguous range. A new systematic phase code and an algorithm for estimating the mean velocities...
An experiment was performed to measure the near-surface current by aiming horizontally two of the beams from an acoustic Doppler current profiler (ADCP) deployed at 0.6-m depth from an anchored (but rolling) ship. The results compare favorably with independent current measurements made at 2-m...
This paper explores ground clutter filtering with a class of cancelers that use regression. Regression filters perform this task in a simple manner, resulting in similar or better performance than the fifth-order elliptic filter implemented in the WSR-88D. Assuming a slowly varying clutter...
Amplitudes of Bragg lines in the Doppler spectrum of high frequency or very high frequency (VHF) ocean radar sea echoes are important because they are used in normalizing the second-order scattering when calculating ocean wave spectra. These amplitudes were originally formulated using the...
Three independent techniques for measuring entrainment at the top of the planetary boundary layer (PBL) from an aircraft are discussed: 1) measuring the terms in the budget of a scalar and solving for the entrainment term; 2) estimating the entrainment velocity as the negative of the ratio of a...
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