Results 11 to 20 of about 135,559,631 (126)

Study on the Detectability of the Sky-Surface Wave Hybrid Radar [PDF]

Journal of Applied Mathematics, 2014
Working in the HF (high-frequency) band and the transmitter and receiver locating separately, the sky-surface wave hybrid radar both has the capabilities of the OTHR (over-the-horizon radar) and the advantage of the bistatic radar. As the electromagnetic
Hou Chengyu, Ke Guo, Shi Tiange, Wang Yuxin   +3 more
doaj   +2 more sources

Sensitivity Analysis of a Sky Wave Over-the-Horizon Radar Simulation Tool [PDF]

, 2023
Fil: Alderete Hero, Gonzalo. Universidad Nacional de Tucumán.
Saavedra, Zenon, Llanes, Adrian, Alderete Hero, Gonzalo, de Haro Barbás, Blas Federico, Di Venanzio, Julian, Elias, Ana Georgina   +5 more
openaire   +2 more sources

Signal Processing Methods to Improve Ocean Surface Wave Estimation from a High Frequency Surface Wave Radar [PDF]

, 2011
High frequency surface wave radars are operated as a remote sensor to measure ocean surface parameters to ranges exceeding 200-300 km from the coastline.
Wang, Wei
core   +6 more sources

Use of a portable topographic mapping millimetre wave radar at an active lava flow. [PDF]

, 2006
A ground-based millimetre wave radar, AVTIS (All-weather Volcano Topography Imaging Sensor), has been developed for topographic monitoring. The instrument is portable and capable of measurements over ranges up to ∼7 km through cloud and at night.
James, M R, Macfarlane, D. G., Pinkerton, H., Robertson, D. A., Macfarlane, D G, Robertson, D A, Wadge, G., Wadge, G, Pinkerton, H, James, M. R., Robertson, D A ; id_orcid, Macfarlane, D G ; id_orcid   +11 more
core   +5 more sources

A CFAR Detector Based on a Robust Combined Method With Spatial Information and Sparsity Regularization in Non-Homogeneous Weibull Clutter

IEEE Access, 2018
In over-the-horizon radar (OTHR), atmospheric noise and sea clutter exist in different regions of Range-Doppler map. To improve the detection performance, a combined method is proposed to identify the cell-under-test (CUT) and estimate the parameters of ...
Yang Li, Longshan Wu, Ning Zhang
doaj   +1 more source

Developments in target micro-Doppler signatures analysis : radar imaging, ultrasound and through-the-wall radar [PDF]

, 2013
Target motions, other than the main bulk translation of the target, induce Doppler modulations around the main Doppler shift that form what is commonly called a target micro-Doppler signature.
Woodbridge, K., Clemente, C., Soraghan, J.J., Balleri, A.   +3 more
core   +5 more sources

A Novel Main-Lobe Cancellation Method Based on a Single Notch Space Filter and Optimized Correlation Analysis Strategy

International Journal of Antennas and Propagation, 2019
The high-frequency hybrid sky-surface wave radar (HFSSWR) is a new kind of over-the-horizon radar system. Combining the advantages of both the sky wave radar and the surface wave radar, HFSSWR has drawn much attention in recent years.
Jiazhi Zhang, Xin Zhang, Weibo Deng, Liang Guo, Qiang Yang   +4 more
doaj   +1 more source

Technology Transfer to Underwater Archaeology: The LAHKE Project at the Submerged Neolithic Site of La Marmotta

Archaeological Prospection, EarlyView.
ABSTRACT This document is a report on the field application of non‐invasive geophysical and robotic prospecting methods at the submerged Neolithic site of La Marmotta (Lake Bracciano, Italy), within the LAHKE (LAke Heritage Knowledge and Exploration) project; the study focuses on the practical validation, adaptation and transfer of existing ...
dell' Erba Ramiro, Cupertino Giacomo, Cipollini Angelo, Luciano Blasi, Quattrucci Luca   +4 more
wiley   +1 more source

The benefit of neighborhood methods for the assimilation of cloud‐affected radiances evaluated in observing‐system simulation experiments

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Neighborhood methods are commonly used in verification to avoid the double‐penalty issue. This study evaluates such methods for the assimilation of infrared and visible satellite observations and extends them to multiscale assimilation. Moreover, a novel technique is tested aimed at mitigating complex biases and structural errors in real‐world model ...
Lukas Kugler, Stefano Serafin, Andrea Hochebner, Nicola Pierotti, Martin Weissmann   +4 more
wiley   +1 more source

Hexapod Locomotion Across Structured and Unstructured Terrains: A Data‐Driven Review of Modeling, Control, and Validation

Journal of Field Robotics, EarlyView.
ABSTRACT The design of a hexapod is complex and requires integration between kinematic models, control systems, and sensing. Existing literature has reviewed these sub‐systems in isolation. Since 2021, there has been no review of the field despite significant advancements in soft soil, lunar traversal, and artificial intelligence.
Akhil Rampersad, Bashan Naidoo
wiley   +1 more source