Results 71 to 80 of about 707,332 (306)
Polarimetric Radar Cross-Sections of Pedestrians at Automotive Radar Frequencies [PDF]
IET Radar Sonar and Navigation 2020, 2019 Simulation of radar cross-sections (RCS) of pedestrians at automotive radar frequencies forms a key tool for software verification test beds for advanced driver assistance systems. Two commonly used simulation methods are: the computationally simple scattering center model of dynamic humans; and the shooting and bouncing ray technique based on ...
arxiv +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.Two archetypes of tornadic quasi‐linear convective systems with and without horizontal shearing instability. Modeled surface precipitation rates (mm ·hr$$ \cdotp \mathrm{hr} $$ −1$$ {}^{-1} $$; colored) and absolute vorticity (contours every 3×10−3$$ 3\times 1{0}^{-3} $$ s−1$$ {}^{-1} $$; dashed when negative) after vortexgenesis from the model domain.
Ty J. Buckingham +3 more
wiley +1 more source
Coding schemes and Applications for Weather Radars [PDF]
arXiv, 2020 In this paper, we describe the evolution of a pair of polyphase coded waveform for use in second trip suppression in weather radar. The polyphase codes were designed and tested on NASA weather radar. The NASA dual-frequency, dual-polarization Doppler radar (D3R) was developed primarily as a ground validation tool for the GPM satellite dual-frequency ...
arxiv
Do We Need to Compensate for Motion Distortion and Doppler Effects in Spinning Radar Navigation?
IEEE Robotics and Automation Letters, 2020 In order to tackle the challenge of unfavorable weather conditions such as rain and snow, radar is being revisited as a parallel sensing modality to vision and lidar.
Keenan Burnett +2 more
semanticscholar +1 more source
A radar‐based investigation of precipitation growth and decay in South Korea
Quarterly Journal of the Royal Meteorological Society, EarlyView.Within a Lagrangian framework, we quantitatively retrieved and assessed precipitation growth and decay using the South Korean radar network, focusing on spatial patterns over the unique geographical features, including complex topography and land–ocean boundaries. Our findings indicate that the precipitation growth and decay is significantly influenced
Kwonil Kim, Chia‐Lun Tsai, GyuWon Lee
wiley +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.The variation of rainfall and its diurnal cycle with the Madden–Julian oscillation over coastal regions of NE Australia exhibit both large‐scale and local‐scale influences. The widespread increased rainfall is driven by large‐scale forcings, while the local enhanced rainfall is likely affected by mesoscale coastal processes. The variation of convective
Thi Lan Dao +3 more
wiley +1 more source
The Journal of Engineering, 2019 The authors report a target separation detection and motion parameter estimation method based on the time-varying autoregressive (TVAR) model. The TVAR model is used to extract the instantaneous Doppler frequencies of multiple targets or scattering ...
Yaolin Zhang +3 more
doaj +1 more source
arXiv, 2017 A brief introduction to radar: principles, Doppler effect, antennas, waveforms, power budget - and future radars. [13 pages]
arxiv
Multi-Radar Inertial Odometry for 3D State Estimation using mmWave Imaging Radar [PDF]
arXiv, 2023 State estimation is a crucial component for the successful implementation of robotic systems, relying on sensors such as cameras, LiDAR, and IMUs. However, in real-world scenarios, the performance of these sensors is degraded by challenging environments, e.g. adverse weather conditions and low-light scenarios.
arxiv
Quarterly Journal of the Royal Meteorological Society, EarlyView.During July 2021 there were widespread reports of flooding across the equatorial Maritime Continent. This analysis reveals how interactions between a system of convectively coupled Kelvin waves (CCKWs) and diurnally phase‐locked westward‐propagating inertio‐gravity waves during an active Madden–Julian Oscillation (MJO) caused these extreme rainfall ...
Natasha V. Senior +7 more
wiley +1 more source