Results 201 to 210 of about 419,379 (250)

Adaptive BDS RTK Positioning with Azimuth-Integer-Based Elevation Masking for Real-Time Deformation Monitoring in Mining Environments. [PDF]

Sensors (Basel)
Zhu L, Li M, Zhao J, Chen B, An Z, Zhang P.   +5 more
europepmc   +1 more source

Optical Fourier Surfaces for Integrated Photonics. [PDF]

ACS Nano
Petter D, Kaufmann F, Chelladurai D, Kohli M, Maeder A, Glauser YM, Lassaline N, Maris JJE, Leuthold J, Grange R, Norris DJ.   +10 more
europepmc   +1 more source

High-Resolution Multiband 3D Imaging of Egyptian Papyri: Integrating Ultra-Close-Range Photogrammetry and Reflectance Transformation Imaging for Enhanced Documentation. [PDF]

Sensors (Basel)
Gargano M, Borghi G, Verni E, Maiocchi FG, Antoniazzi S, Goggi V, Grifoni E.   +6 more
europepmc   +1 more source

Efficiency-optimized relativistic plasma harmonics for extreme fields. [PDF]

Nature
Timmis RJL, Fitzpatrick CRJ, Kennedy JP, Huddleston HM, Denis E, James A, Baird C, Symes D, McGonegle D, Atonga E, Martin H, Rebenstock J, Neely J, Lee J, Redfern J, Bourgeois N, Finlay O, Ruskov R, Astbury S, Hawkes S, Zhang Z, Zepf M, Krushelnick K, Gumbrell E, Rajeev PP, Yeung M, Dromey B, Norreys P.   +27 more
europepmc   +1 more source

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Terahertz Radar with High Resolution Range Profile

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2021
In this paper, the performance of terahertz (THz) radar based on high resolution range profile (HRRP) is described. This terahertz radar, developed for the high resolution imaging under the complex environment such as sand-dust weather and so on, operates at 230GHz over multiple GHz of bandwidth.
Jialin Mei, Zhaoyang Li, Chong Yi, Jingshui Zhang, Yupeng Wang, Mingyuan Sun   +5 more
exaly   +2 more sources

High Range Resolution Profile of Simulated Aircraft Wake Vortices

IEEE Transactions on Aerospace and Electronic Systems, 2012
Knowledge of radar scattering characteristics is very important to the development of radar detection technology on aircraft wake vortices. In this paper, the high range resolution (HRR) profile of the wake vortex is investigated. The HRR profile is observed to have a particular structure, from which the wingspan of the aircraft can be easily ...
Jianbing Li
exaly   +2 more sources

A method of range measurement based on high resolution range profile

2017 11th European Conference on Antennas and Propagation (EUCAP), 2017
In conventional methods, the weighted mean range of the scattering centers on the high resolution range proflle(HRRP) is assumed as the range between the target center and radar. However, this assumption is not reasonable because the scattering center with the maximum amplitude may not locate at the center of the target.
Gongjian Wen, Xiaoliang Yang
exaly   +2 more sources

High Range Resolution Profile Estimation via a Cognitive Stepped Frequency Technique

IEEE Transactions on Aerospace and Electronic Systems, 2019
The problem of high range resolution profile (HRRP) estimation is considered in this paper. In particular, stepped frequency waveforms are devised to enhance the target range profile (RP) estimation accuracy. The basic idea relies on the dynamic optimization of the probing waveform accounting for some feedback information to minimize the profile ...
Antonio De Maio, Vincenzo Carotenuto, Augusto Aubry   +2 more
exaly   +5 more sources

The resolution of high resolution range profile for two ideal point targets

2012 IEEE International Conference on Information Science and Technology, 2012
The resolution is an important concept in radar. Based on the mathematic model of high resolution range profile (HRRP), this paper investigates the resolution of HRRP for two ideal point targets. Theoretical analyses indicate that two ideal point targets can always be resolved in HRRP once they are separated by a distance larger than 1.7∗c/(2B), where ...
Rui Zhang, Xi Zhang Wei, Xiang Li
exaly   +2 more sources