Results 31 to 40 of about 19,915 (242)

Characterization of surface clutter signal in the presence of orography for a spaceborne conically scanning W-band Doppler radar [PDF]

Atmospheric Measurement Techniques
The Earth's surface radar reflection is one of the most important signals received by spaceborne radar systems. It is used in several scientific applications, including geolocation, terrain classification, and path-integrated attenuation estimation.
F. Manconi, A. Battaglia, A. Battaglia, P. Kollias, P. Kollias   +4 more
doaj   +1 more source

Comparison of D-region Doppler drift winds measured by the SuperDARN Finland HF radar over an annual cycle using the Kiruna VHF meteor radar [PDF]

, 2003
The SuperDARN chain of oblique HF radars has provided an opportunity to generate a unique climatology of horizontal winds near the mesopause at a number of high latitude locations, via the Doppler shifted echoes from sources of ionisation in the D-region.
N. F. Arnold (7589813), T. R. Robinson (7590257), P. A. Cook, Chapman, Peter J., N. Mitchell, P. A. Cook (7692134), Lester, M., Mitchell, N., Mitchell, Nick, P. J. Chapman, Arnold, Neil E., Robinson, T. R., Chapman, P. J., M. Lester, Cook, Peter A., M. Lester (7589660), P. J. Chapman (7590299), Arnold, N. F., Cook, P. A., T. R. Robinson, Lester, Mark, N. Mitchell (7692137), N. F. Arnold   +22 more
core   +1 more source

A Doppler Radar System for Sensing Physiological Parameters in Walking and Standing Positions

Sensors, 2017
Doppler radar can be implemented for sensing physiological parameters wirelessly at a distance. Detecting respiration rate, an important human body parameter, is essential in a range of applications like emergency and military healthcare environments ...
Malikeh Pour Ebrahim, Majid Sarvi, Mehmet Rasit Yuce   +2 more
doaj   +1 more source

FDA-MIMO Radar Moving Target Detection Based on Doppler Spread Compensation

Leida xuebao, 2022
When Frequency Diverse Array and Multiple-Input Multiple-Output (FDA-MIMO) radar detects moving targets, the frequency offset between transmitting arrays is coupled with the target velocity, resulting in severe Doppler spread in the slow time dimension ...
Shunsheng ZHANG, Meihui LIU, Wenqin WANG
doaj   +1 more source

Simultaneous HF measurements of E- and F-region Doppler velocity at large flow angles [PDF]

, 2004
International audienceData collected by the CUTLASS Finland HF radar are used to illustrate the significant difference between the cosine component of the plasma convection in the F-region and the Doppler velocity of the E-region coherent echoes observed
Koustov, A. V., Makarevitch, R. A., F. Honary, Honary, F., R. A. Makarevitch, A. V. Koustov   +5 more
core   +1 more source

Modification of reconstruction threshold algorithm in two-dimensional LFMCW compressive radar

Journal of Electrical Systems and Information Technology, 2022
Nowadays, the Compressive Sensing theory has an important effect on many communication system’s performances, and one of these applications is the radar system.
Sameh Ghanem
doaj   +1 more source

Velocity Dealiased Spectral Estimators of Range Migrating Targets using a Single Low-PRF Wideband Waveform [PDF]

, 2013
Wideband radars are promising systems that may provide numerous advantages, like simultaneous detection of slow and fast moving targets, high range-velocity resolution classification, and electronic countermeasures.
Bidon, Stéphanie, Besson, Olivier, Deudon, François, Tourneret, Jean-Yves   +3 more
core   +1 more source

A new method for Synthetic Impulse and Aperture Radar transmitting waveform design based on non‐sequential positive, negative and random carrier frequency coding with dot product approach

IET Radar, Sonar & Navigation, 2022
Synthetic Impulse and Aperture Radar (SIAR) is a kind of Multiple Input Multiple Output (MIMO) radar. It is a four‐dimensional radar that has advantages against stealth targets, multi targets, anti‐radiated missile, reconnaissance and interference, as ...
Pourya Yaghoubi Aliabad, Hossein Soleimani, Mohammad Soleimani   +2 more
doaj   +1 more source

Flow angle dependence for the asymmetry of broad 50-MHz coherent echoes at large magnetic aspect angles [PDF]

, 1997
International audienceThe skewness of broad Type 2-like spectra has been studied using data collected by two orthogonal CW 50-MHz radio links with co-located scattering volumes. Geometrical aspect angles of observations were about 10°.
Sofko, G.J., Kustov, A. V., Kustov, A.V., Uspensky, M. V., M. V. Uspensky, Sofko, G. J., Koehler, J.A., Uspensky, M.V., A. V. Kustov, Koehler, J. A., J. A. Koehler, G. J. Sofko   +11 more
core   +1 more source

Imaging observations of nighttime mid-latitude F-region field-aligned irregularities by an MU radar ultra-multi-channel system [PDF]

Annales Geophysicae, 2008
Mid-latitude F-region field-aligned irregularities (FAIs) were studied by using the middle-and-upper atmosphere (MU) radar ultra-multi-channel system with the radar imaging technique.
S. Saito, S. Saito, M. Yamamoto, H. Hashiguchi   +3 more
doaj   +1 more source