Results 11 to 20 of about 118,033 (340)
New Journal of Physics, 2016 The Doppler effect, the shift in the frequency of sound due to motion, is present in both classical gases and quantum superfluids. Here, we perform an in situ , minimally destructive measurement, of the persistent current in a ring-shaped, superfluid ...
A Kumar +5 more
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Frequency-domain waveform approximants capturing Doppler shifts [PDF]
Physical Review D, 2019 11 pages, 5 figures, submitted to Phys.
Chamberlain K +3 more
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Time-Frequency Integrals and the Stationary Phase Method in Problems of Waves Propagation from Moving Sources [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2012 The time-frequency integrals and the two-dimensional stationary phase method are applied to study the electromagnetic waves radiated by moving modulated sources in dispersive media. We show that such unified approach leads to explicit expressions for the
Gennadiy Burlak, Vladimir Rabinovich
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Micro-Doppler Parameters Extraction of Precession Cone-Shaped Targets Based on Rotating Antenna
Remote Sensing, 2022 Micro-Doppler is regarded as a unique signature of a target with micro-motions. The sophisticated recognition of the cone-shaped targets can be realized through the micro-Doppler effect.
Zhihao Wang +4 more
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Multi-frequency observations of E-region HF radar aurora [PDF]
Annales Geophysicae, 2003 Multi-frequency observations of E-region coherent backscatter from decametre waves reveal that auroral echoes tend to comprise two spectral components superimposed, one at low Doppler shifts, below 250 ms-1, and the other Doppler shifted to near ...
S. E. Milan, M. Lester, N. Sato
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Remote Sensing, 2022 In addition to traditional linear Doppler shift, the angular Doppler shift in vortex electromagnetic wave (VEMW) radar systems carrying orbital angular momentum (OAM) can provide more accurate target identification micro-motion parameters, especially the
Lijun Bu +5 more
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Spectral and temporal gating mechanisms enhance the clutter rejection in the echolocating bat, Rhinolophus rouxi [PDF]
, 1991 Doppler shift compensation behaviour in horseshoe bats, Rhinolophus rouxi, was used to test the interference of pure tones and narrow band noise with compensation performance.
Neumann, Ingrid, Schuller, Gerd
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Storage of Doppler-Shift Information in the Echolocation System of the "CF-FM"-Bat, Rhinolophus ferrumequinum [PDF]
, 1976 The greater horseshoe bat (Rhinolophus ferrumequinum) emits echolocation sounds consisting of a long constant-frequency (CF) component preceeded and followed by a short frequency-modulated (FM) component. When an echo returns with an upward Doppler-shift,
Schuller, Gerd, Suga, Nobuo
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Hearing Characteristics and Doppler Shift Compensation in South Indian CF-FM Bats [PDF]
, 1980 1. Echolocation pulses, Doppler shift compensation behaviour under laboratory conditions and frequency response characteristics of hearing were recorded inRhinolophus rouxi, Hipposideros speoris andHipposideros bicolor. 2.
A. Brosset +13 more
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Leida xuebao, 2019 Doppler center shift is an important parameter for Synthetic Aperture Radar(SAR) to retrieve ocean surface wind field and ocean surface current field. We present a calculation method of Doppler centroid shift for airborne side-looking SAR.
ZHAO Xianbin +4 more
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