Results 31 to 40 of about 93,870 (317)

Vision-Based Moving-Target Geolocation Using Dual Unmanned Aerial Vehicles

Remote Sensing, 2023
This paper develops a framework for geolocating ground-based moving targets with images taken from dual unmanned aerial vehicles (UAVs). Unlike the usual moving-target geolocation methods that rely heavily on accurate navigation state sensors or ...
Tingwei Pan, Jianjun Gui, Hongbin Dong, Baosong Deng, Bingxu Zhao   +4 more
doaj   +1 more source

Radar studies of the vertical distribution of insects migrating over southern Britain: the influence of temperature inversions on nocturnal layer concentrations [PDF]

, 2005
Insects migrating over two sites in southern UK (Malvern in Worcestershire, and Harpenden in Hertfordshire) have been monitored continuously with nutating vertical-looking radars (VLRs) equipped with powerful control and analysis software.
Barlow, Janet Fraser, Chapman, J.W., Edwards, A.S., Reynolds, D.R., Smith, A.D., Woiwod, I.P., Wood, Curtis Ron   +6 more
core   +1 more source

Tracking Multiple Unmanned Aerial Vehicles through Occlusion in Low-Altitude Airspace

Drones, 2023
In an intelligent multi-target tracking (MTT) system, the tracking filter cannot track multi-targets significantly through occlusion in a low-altitude airspace.
Sufyan Ali Memon, Hungsun Son, Wan-Gu Kim, Abdul Manan Khan, Mohsin Shahzad, Uzair Khan   +5 more
doaj   +1 more source

SOLUTION OF TASK OPTIMAL PLANNING OF AIR DEFENSE MEANS AGAINST LOW-ALTITUDE AIR TARGETS [PDF]

Journal of Defense Resources Management
The article examines the methods of their destruction by air defense systems, taking into account the low-altitude operation of various types of air attack weapons fighter airplane, helicopter, cruise missile, reconnaissance unmanned aerial vehicles and ...
Arzuman G. GASANOV
doaj   +1 more source

Low-Altitude Target Localization Method Based on Exogenous Radar with Multi-Base Station and 5G SSB Signals. [PDF]

Sensors (Basel)
Xu Y, Tu G, Zhang L, Zhou Y, Xiong M, Li Y.   +5 more
europepmc   +2 more sources

Low elevation target altitude measurement for ubiquitous radar based on known transmitted waveform and sparse representation

IET Radar, Sonar & Navigation, 2022
The multipath effect deteriorates the performance of low elevation target altitude estimation with a ubiquitous radar strongly, especially in complex terrain environments in which multiple reflection paths exist simultaneously.
Rui Guo, Xiangyu Peng, Biao Tian, Yue Zhang, Zengping Chen   +4 more
doaj   +1 more source

Research on the Guidance Method of Radar-Type Anti-Aircraft Missile against Ultra-Low-Altitude Target [PDF]

Hangkong bingqi, 2023
In view of the problem that radar-type anti-aircraft missiles are affected by the multipath effect when intercepting ultra-low-altitude targets, the radar seeker looks down to detect the target, which seriously reduces the tracking accuracy, and the ...
Suo Sibo, Zhao Huachao
doaj   +1 more source

Phased array parameter optimization for low-altitude targets [PDF]

Proceedings International Radar Conference, 2002
The paper investigates optimal integration times, search strategies, and confirmation strategies for an X-band, pulse-Doppler, phased array radar which is performing the horizon surveillance function.
Trunk, G. V., Wilson, J. D., Hughes, P. K.   +2 more
openaire   +2 more sources

A New Radar Echo Generation Model for Ultra-Low Altitude Targets in Far-Field Conditions

International Journal of Antennas and Propagation, 2022
This paper proposed a new radar echo simulation method for ultra-low altitude targets in far-field conditions. Based on the electromagnetic (EM) scattering calculation of target and environment, combined with the weighted four-path model, the scattering ...
Zhao Long Wang, Chuang Ming Tong, Tong Wang, Yi Jin Wang, Qing Kuan Wang   +4 more
doaj   +1 more source

Classification of High-Altitude Flying Objects Based on Radiation Characteristics with Attention-Convolutional Neural Network and Gated Recurrent Unit Network

Remote Sensing, 2023
In the task of classifying high-altitude flying objects, due to the limitations of the target flight altitude, there are issues such as insufficient contour information, low contrast, and fewer pixels in the target objects obtained through infrared ...
Deen Dai, Lihua Cao, Yangfan Liu, Yao Wang, Zhaolong Wu   +4 more
doaj   +1 more source