Results 71 to 80 of about 167,781,360 (200)

Evaluating TEMPO Formaldehyde Retrievals With Co‐Located Ground‐Based FTIR and Pandora Observations

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 9, 16 May 2026.
Abstract Formaldehyde (HCHO) is an important proxy for volatile organic compounds and photochemical activity, with significant implications for air quality and atmospheric chemistry. The recently launched geostationary satellite instrument Tropospheric Emissions: Monitoring of Pollution (TEMPO) provides the first‐ever hourly observations of HCHO and ...
Ivan Ortega, James W. Hannigan, David Edwards, Wolfgang Stremme, Michel Grutter, Andrea Cadena‐Caicedo, Kimberly Strong, Victoria Flood, Xiaoyi Zhao, Gonzalo Gonzalez Abad, Caroline R. Nowlan   +10 more
wiley   +1 more source

A Distributed Sensor-based Recursive Framework for DoA Estimation and Geolocation [PDF]

This paper proposes a distributed sensor-based RECursive Subspace and Factor Graph (RECSaFG) framework for direction-of-arrival (DoA) estimation and geolocation of a fast-moving target.
Matsumoto, Tad, Jun-Ichi Takada, Nopphon Keerativoranan, Jiang, Lei, Keerativoranan, Nopphon, Takada, Jun-ichi, Tad Matsumoto, Lei Jiang   +7 more
core   +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

Research on 2-D Direction of Arrival (DOA) Estimation for an L-Shaped Array

Remote Sensing
Lately, there has been a significant increase in interest in coprime array configurations, as they offer the advantage of generating more extensive array apertures and enhanced degrees of freedom when contrasted with standard linear arrays. This document introduces an innovative two-dimensional direction-of-arrival (2-D DOA) estimation technique ...
Kun Ye, Lang Zhou, Shaohua Hong, Xuebo Zhang 0002, Haixin Sun   +4 more
openaire   +3 more sources

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

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

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

DOA Estimation Based on Real-Valued Cross Correlation Matrix of Coprime Arrays

Sensors, 2017
A fast direction of arrival (DOA) estimation method using a real-valued cross-correlation matrix (CCM) of coprime subarrays is proposed. Firstly, real-valued CCM with extended aperture is constructed to obtain the signal subspaces corresponding to the ...
Jianfeng Li, Feng Wang, Defu Jiang
doaj   +1 more source

Problems with direction finding using linear array with element spacing more than half wavelength [PDF]

, 2002
This paper investigates the performance of different parameter estimation algorithms in direction finding using a linear array with element spacing of more than half a wavelength.
Nix, AR, Tan, CM, Beach, MA
core