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What 1991 Upper Deck Football Cards Are Worth Money Published 28 April 2014 Abstract Oblique backscatter sounding is a powerful tool for detecting and monitoring the ionospher continuously at a remote distance High frequency HF

Feb 1 1997 0183 32 Swept Frequency Acoustic Interferometry SFAI is a noninvasive fluid characterization technique currently being developed for chemical weapons treaty verification This report summarizes the results obtained during an investigation directed toward the use of adpative antenna array beamforming techniques in HF backscatter radar systems

This distinguished HF Doppler measurements from prior measurements of E region irregularities that were obtained with radars operating at very high frequency VHF and ultra high frequency

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Techniques For Doppler Spectral Estimation Of HF Radar Signals

https://apps.dtic.mil › sti › tr › pdf
Two areas of particular interest are the mechanisms by which these irregularities are created and the Doppler spectral characteristics that these irregularities introduce when scattering

Automatic Scaling Of HF Swept 226 Frequency Backscatter Ionograms

https://agupubs.onlinelibrary.wiley.com › doi › pdf
Abstract This paper describes a method for automatically scaling HF swept frequency backscatter ionograms which can be applied to a low power oblique backscatter sounding system

Chapter 4 Oblique Backscatter Sounders Springer

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Two basic system configurations are used to carry out direct backscatter studies of the ionosphere the monostatic pulsed system and the multistatic pulsed or CW system the

DTIC AD0774829 FM CW Radar Signals And Digital Processing

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Dec 31 2014 0183 32 The use and processing of the FM CW signal for radar and acoustic sounder systems are examined This signal along with real time digital processing via minicomputers

CODAR Ocean Sensors Oceanographic High Frequency Radar

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ABSTRACT The use and processing of the FM CW signal for radar and acoustic sounder systems are examined this note This signal al ong with real time digital processing via

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