Results 11 to 20 of about 1,456,467 (172)

Deriving Surface Reflectance From Visible/Near Infrared and Ultraviolet Satellite Observations Through the Community Radiative Transfer Model

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Earth's surface reflectance is an important parameter affecting ultraviolet (UV) and visible (VIS) radiance calculations at the top of the atmosphere because many UV and VIS channels can acquire information about the surface and atmosphere.
Quanhua Liu, Banghua Yan, Kevin Garrett, Yingtao Ma, Xingming Liang, Jingfeng Huang, Wenhui Wang, Changyong Cao   +7 more
doaj   +1 more source

An Innovative Fingerprint Location Algorithm for Indoor Positioning Based on Array Pseudolite

Sensors, 2019
Since the signals of the global navigation satellite system (GNSS) are blocked by buildings, accurate positioning cannot be achieved in an indoor environment.
Lu Huang, Xingli Gan, Baoguo Yu, Heng Zhang, Shuang Li, Jianqiang Cheng, Xiaohu Liang, Boyuan Wang   +7 more
doaj   +1 more source

Improvement of MiRS Sea Surface Temperature Retrievals Using a Machine Learning Approach

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
We report on the development of a machine learning approach to improving sea surface temperature (SST) retrievals based on satellite-based microwave channel measurements at frequencies higher than 23 GHz.
Shuyan Liu, Christopher Grassotti, Quanhua Liu, Yan Zhou, Yong-Keun Lee   +4 more
doaj   +1 more source

Spectral Recalibration of NOAA HIRS Longwave CO₂ Channels toward a 40+ Year Time Series for Climate Studies

Atmosphere, 2021
The High-Resolution Infrared Radiation Sounder (HIRS) on NOAA and MetOp A/B satellites has been observing the Earth continuously for over four decades, providing essential data for operational numerical weather prediction, retrieval of atmospheric ...
Bin Zhang, Changyong Cao, Tung-Chang Liu, Xi Shao   +3 more
doaj   +1 more source

Doppler Differential Positioning Technology Using the BDS/GPS Indoor Array Pseudolite System

Sensors, 2019
A Global Satellite Navigation System (GNSS) cannot provide normal location services in an indoor environment because the signals are blocked by buildings.
Xingli Gan, Baoguo Yu, Lu Huang, Ruicai Jia, Heng Zhang, Chuanzhen Sheng, Guangwei Fan, Boyuan Wang   +7 more
doaj   +1 more source

Adaptive Spoofing Suppression Algorithm for GNSS Based on Multiple Antennas Array

Sensors, 2020
The signals of navigation satellites are easily affected by spoofing interference, causing the wrong position, speed or Universal Time Coordinate of the receiver to be calculated.
Guangwei Fan, Xingli Gan, Baoguo Yu, Qiang Rong, Chuanzhen Sheng   +4 more
doaj   +1 more source

Preliminary Development and Testing of an EPS-SG Microwave Sounder Proxy Data Generator Using the NOAA Microwave Integrated Retrieval System

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
The European Organisation for the Exploitation of Meteorological Satellites currently plans to launch Meteorological Operational Satellite Second Generation A1 (Metop-SG A1) with the microwave Sounder (MWS) instrument in 2023.
Yong-Keun Lee, Quanhua Liu, Christopher Grassotti, Xingming Liang, Shuyan Liu, Yan Zhou, Ming Fang   +6 more
doaj   +1 more source

Precise Point Positioning Algorithm for Pseudolite Combined with GNSS in a Constrained Observation Environment

Sensors, 2020
In urban canyon environments, Global Navigation Satellite System (GNSS) satellites are heavily obstructed with frequent rise and fall and severe multi-path errors induced by signal reflection, making it difficult to acquire precise, continuous, and ...
Chuanzhen Sheng, Xingli Gan, Baoguo Yu, Jingkui Zhang   +3 more
doaj   +1 more source

Multi-Level Fusion Indoor Positioning Technology Considering Credible Evaluation Analysis

Remote Sensing, 2023
Aiming at the problems of the low robustness and poor reliability of a single positioning source in complex indoor environments, a multi-level fusion indoor positioning technology considering credible evaluation is proposed.
Lu Huang, Baoguo Yu, Shitong Du, Jun Li, Haonan Jia, Jingxue Bi   +5 more
doaj   +1 more source

Unambiguous Acquisition/Tracking Technique Based on Sub-Correlation Functions for GNSS Sine-BOC Signals

Sensors, 2020
The autocorrelation function (ACF) of the Binary Offset Carrier modulation (BOC) signal for Global Navigation Satellite System (GNSS) has multiple peaks, ambiguity is easily generated during the synchronization of the baseband signal.
Fang Hao, Baoguo Yu, Xingli Gan, Ruicai Jia, Heng Zhang, Lu Huang, Boyuan Wang   +6 more
doaj   +1 more source