Results 91 to 100 of about 13,266 (201)

Spatiotemporal Assessment of the TEMPO Formaldehyde Column Retrieval Using the Pandonia Global Network

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract Launched in April 2023, the Tropospheric Emissions: Monitoring of Pollution (TEMPO), instrument provides for the first time hourly measurements of atmospheric pollutants over most of North America at high spatial resolution (∼2 × 4.75 km2).
Prajjwal Rawat, Katherine R. Travis, Barron Henderson, James H. Crawford, Laura M. Judd, Mary Angelique G. Demetillo, Tabitha C. Lee, David E. Flittner, James J. Szykman, Lukas C. Valin, Andrew Whitehill, Eric Baumann, Thomas F. Hanisco, Apoorva Pandey, Gonzalo Gonzalez Abad, Caroline R. Nowlan, Xiong Liu, Kelly Chance   +17 more
wiley   +1 more source

Near-Field Monopulse DoA Estimation for Angle-Sensitive Proximity WiFi Readers

IEEE Access, 2019
We study the effect of close-proximity in the estimation of the Direction-of-Arrival (DoA) using a monopulse antenna array system, with application to angle-sensitive proximity WiFi readers.
Jose Antonio Lopez-Pastor, Antonio Gomez-Alcaraz, David Canete-Rebenaque, Alejandro Santos Martinez-Sala, Jose Luis Gomez-Tornero   +4 more
doaj   +1 more source

Regularised Hyper Parameter Bi Level Optimisation With Continual Learning Based Deep Neural Network for Beamforming in Ultra‐Wide Band System

IET Communications, Volume 20, Issue 1, January/December 2026.
This research proposes a Regularised Hyperparameter Bilevel Optimisation with Continual Learning‐based Deep Neural Network (RHBO‐CLDNN) for beamforming in an Ultra‐Wide Band (UWB) system. The RHBO ensures the hyperparameter efficiency at both upper and lower levels, which allows DNN to fine‐tune the unique characteristics of the UWB system, which leads
Pradeep Kumar Siddanna, Bidare Divakarachari Parameshachari, Dharmanna Shivappa Lamani   +2 more
wiley   +1 more source

Effects of reference sound speed on underwater acoustic direction-of-arrival estimation with horizontal plane array [PDF]

JASA Express Letters
Direction-of-arrival (DOA) estimation of an underwater acoustic target is usually dependent on the selection of reference sound speed. For a horizontal line array, severe error of DOA estimation is induced when reference sound speed diverges from phase ...
Feitong Chen, Lianghao Guo, Yuhan Liu, Jianjun Liu, Weiyu Zhang, Jiapeng Song, Ge Dong   +6 more
doaj   +1 more source

Quantifying and Reducing the DOA Estimation Error Resulting from Antenna Pattern Deviation for Direction-Finding HF Radar

Remote Sensing, 2017
High-frequency (HF) radars are routinely used for remotely sensing ocean surface currents. However, the performance of the most widely used direction-finding HF radar is degraded due to the effect of the inevitable deviations of actual antenna pattern on
Yeping Lai, Hao Zhou, Yuming Zeng, Biyang Wen   +3 more
doaj   +1 more source

Satellite Interference Source Direction of Arrival (DOA) Estimation Based on Frequency Domain Covariance Matrix Reconstruction. [PDF]

Sensors (Basel), 2023
Yao J, Zhao C, Bai J, Ren Y, Wang Y, Miao J.   +5 more
europepmc   +1 more source

Direction of Arrival (DOA) Estimation in an Array of Antennas using Derivative-Free Methods

International Journal of Computer Applications, 2015
In this paper, direction of arrival estimation has been addressed using derivative free methods and their hybrid procedure in antenna array signal processing. The problem has been formulated in the root mean square error sense by considering the single snapshot.
Junaid Ali Khan, Shahzada Alamgir, Raees M.Asif   +2 more
openaire   +1 more source

Cramer-Rao Bound for Sparse Signals Fitting the Low-Rank Model with Small Number of Parameters

, 2015
In this paper, we consider signals with a low-rank covariance matrix which reside in a low-dimensional subspace and can be written in terms of a finite (small) number of parameters. Although such signals do not necessarily have a sparse representation in
Shaghaghi, Mahdi, Vorobyov, Sergiy A.
core   +1 more source

Two-Dimensional Angle Estimation of Two-Parallel Nested Arrays Based on Sparse Bayesian Estimation

Sensors, 2018
To increase the number of estimable signal sources, two-parallel nested arrays are proposed, which consist of two subarrays with sensors, and can estimate the two-dimensional (2-D) direction of arrival (DOA) of signal sources.
Lu Chen, Daping Bi, Jifei Pan
doaj   +1 more source

High-Resolution and Robust One-Bit Direct-of-Arrival Estimation via Reweighted Atomic Norm Estimation

Sensors
In recent years, one-bit quantization has attracted widespread attention in the field of direction-of-arrival (DOA) estimation as a low-cost and low-power solution.
Rui Li, Jianchao Yang, Zheng Dai, Xingyu Lu, Ke Tan, Weimin Su   +5 more
doaj   +1 more source