Results 21 to 30 of about 1,235,187 (346)

Interpretation and sensitivity analysis of the InSAR line of sight displacements in landslide measurements

GIScience & Remote Sensing, 2022
Landslides are major geological hazards and frequently occur in mountainous areas with steep slopes, often causing significant loss. Interferometric Synthetic Aperture Radar (InSAR) has been widely used in landslide measurement over the last three ...
K. Dai, Jin Deng, Qiang Xu, Zhenhong Li, Xianlin Shi, C. Hancock, N. Wen, Lele Zhang, Guan Zhuo   +8 more
semanticscholar   +1 more source

Engineering-Economic Evaluation of Diffractive NLOS Backhaul (e3nb): A Techno-economic Model for 3D Wireless Backhaul Assessment

IEEE Access, 2022
Developing ways to affordably deliver broadband connectivity is one of the major issues of our time. In challenging deployment locations with irregular terrain, traditional Clear-Line-Of-Sight (CLOS) wireless links can be uneconomical to deploy, as the ...
Edward J. Oughton, Erik Boch, Julius Kusuma   +2 more
doaj   +1 more source

WiFi round-trip time (RTT) fingerprinting: an analysis of the properties and the performance in non-line-of-sight environments

Journal of Location Based Services, 2023
Indoor positioning systems based on WiFi round-trip time (RTT) measurement were reported to deliver sub-metre-level accuracy using trilateration, under ideal indoor conditions.
Xu Feng, Khuong An Nguyen, Z. Luo
semanticscholar   +1 more source

Alternating Direction Method of Multipliers for TOA-Based Positioning Under Mixed Sparse LOS/NLOS Environments

IEEE Access, 2021
For positioning system based on wireless sensor networks, NLOS errors are one of the main factors to degrade localization performance of an algorithm, about which lots of research results and analysis have been published in previous literatures to ...
Chengwen He, Yunbin Yuan, Bingfeng Tan
doaj   +1 more source

Time-of-arrival–based localization algorithm in mixed line-of-sight/non-line-of-sight environments

International Journal of Distributed Sensor Networks, 2020
A novel time-of-arrival–based localization algorithm in mixed line-of-sight/non-line-of-sight environments is proposed. First, an optimization problem of target localization in the known distribution of line-of-sight and non-line-of-sight is established,
Peixin Wang, Youming Li, Shengming Chang, Xiaoping Jin, Xiaoli Wang   +4 more
doaj   +1 more source

Design of Multi-Missile Cooperative Guidance Law Based on Pulse Engine Characteristics [PDF]

Hangkong bingqi, 2022
Aiming at the design problem of multi-missile cooperative guidance law for attacking high-speed targets, a design method of multi-missile cooperative guidance law based on the working characteristics of pulse engine is proposed.
Pan Hui, Zhang Zhenlin, Guo Chao
doaj   +1 more source

BICEP/Keck. XVII. Line-of-sight Distortion Analysis: Estimates of Gravitational Lensing, Anisotropic Cosmic Birefringence, Patchy Reionization, and Systematic Errors [PDF]

Astrophysical Journal, 2022
We present estimates of line-of-sight distortion fields derived from the 95 and 150 GHz data taken by BICEP2, BICEP3, and the Keck Array up to the 2018 observing season, leading to cosmological constraints and a study of instrumental and astrophysical ...
B. C. P. Ade, Z. Ahmed, M. Amiri, D. Barkats, R. Thakur, D. Beck, C. Bischoff, J. Bock, H. Boenish, E. Bullock, V. Buza, IV J.R.Cheshire, J. Connors, J. Cornelison, M. Crumrine, A. Cukierman, E. Denison, M. Dierickx, L. Duband, M. Eiben, S. Fatigoni, J. Filippini, S. Fliescher, C. Giannakopoulos, N. Goeckner-wald, D. Goldfinger, J. Grayson, P. Grimes, G. Halal, G. Hall, M. Halpern, E. Hand, S. Harrison, S. Henderson, S. Hildebrandt, J. Hubmayr, H. Hui, K. Irwin, J. Kang, K. Karkare, E. Karpel, S. Kefeli, S. A. Kernasovskiy, J. Kovac, C. Kuo, K. Lau, E. Leitch, A. Lennox, K. Megerian, L. Minutolo, L. Moncelsi, Y. Nakato, T. Namikawa, H. Nguyen, R. O’Brient, IV R.W.Ogburn, S. Palladino, M. Petroff, T. Prouvé, C. Pryke, B. Racine, C. Reintsema, S. Richter, A. Schillaci, B. Schmitt, R. Schwarz, C. Sheehy, B. Singari, A. Soliman, T. S. Germaine, B. Steinbach, R. Sudiwala, G. Teply, K. Thompson, J. Tolan, C. Tucker, A. Turner, C. Umiltà, C. Vergès, A. Vieregg, A. Wandui, A. Weber, D. Wiebe, J. Willmert, C. Wong, W.L.K. Wu, H. Yang, K. Yoon, E. Young, C. Yu, L. Zeng, C. Zhang, S. University, Kipacslac, U. Columbia, HarvardCfA, Caltech, U. Cincinnati, S. University, Nasa Jpl, M. I. O. Astrophysics, U. Chicago, U. Minnesota, Nist, Sbt Grenoble, U. I. Urbana-Champaign, Harvard University, T. U. O. Tokyo, Aix-Marseille Université, Brookhaven National Laboratory   +109 more
semanticscholar   +1 more source

Mass hysteria among South African primary school learners in Kwa-Dukuza, KwaZulu-Natal

South African Family Practice, 2010
During August 2002, at a primary school in Kwa-Dukuza, KwaZulu-Natal, 27 children who had been well when they left their homes collapsed at school, displaying tremors and shivers throughout their bodies. Many of the children also presented with abdominal
Indiran Govender
doaj   +1 more source

Impact of Evaporation Duct on Line-of-sight Propagation of Electromagnetic Waves

Journal of Physics: Conference Series, 2023
Generated by the evaporation of seawater, evaporation duct (ED) is an air-sea interaction that occurs over the sea surface. The electromagnetic (EM) waves will be trapped in ED when propagating beyond line-of-sight.
F. Yang, K-D Yang, Y. Shi, S-W Wang, H. Zhang, Y-M Zhao, D. Hu, Guoyu Dong   +7 more
semanticscholar   +1 more source

Tracking Vector Magnetograms with the Magnetic Induction Equation [PDF]

, 2008
The differential affine velocity estimator (DAVE) developed in Schuck (2006) for estimating velocities from line-of-sight magnetograms is modified to directly incorporate horizontal magnetic fields to produce a differential affine velocity estimator for ...
Fieller E. C., Hildreth E. C., Joyner D., Marr D., P. W. Schuck, Santos J. C.   +5 more
core   +1 more source