Results 71 to 80 of about 1,035 (137)

Spatial Estimation of Soil Organic Matter and Total Nitrogen by Fusing Field Vis–NIR Spectroscopy and Multispectral Remote Sensing Data

Remote Sensing
Accurate and timely acquisition of soil information is crucial for precision agriculture, food security, and environmental protection. Proximal visible near-infrared reflectance (vis–NIR) spectroscopy has been widely employed for rapid and accurate soil ...
Dongyun Xu, Songchao Chen, Yin Zhou, Wenjun Ji, Zhou Shi   +4 more
doaj   +1 more source

Retrieval of Sea Surface Wind Speeds from Gaofen-3 Full Polarimetric Data

Remote Sensing, 2019
In this paper, the sea surface wind speed (SSWS) retrieval from Gaofen-3 (GF-3) quad-polarization stripmap (QPS) data in vertical-vertical (VV), horizontal-horizontal (HH), and vertical-horizontal (VH) polarizations is investigated in detail based on ...
Tianyu Zhang, Xiao-Ming Li, Qian Feng, Yongzheng Ren, Yingni Shi   +4 more
doaj   +1 more source

Wind vector retrieval from Gaofen-3 SAR imagery using the method of iterative line fitting in image power spectrum domain

All Earth
The Gaofen-3 (GF-3) is a Chinese Synthetic Aperture Radar (SAR) satellite primarily designed for monitoring marine dynamic environments. Compared to spaceborne scatterometers, it can monitor sea surface wind fields with higher spatial resolution ...
Xuetong Xie, Jinlan Zhang, Yan Zheng, Kehai Chen   +3 more
doaj   +1 more source

NESZ effects on wind retrievals from Gaofen-3 SAR wave mode data

Frontiers in Earth Science
This study analyzes the effects of noise equivalent sigma zero (NESZ) on wind retrieval accuracy based on the estimated NESZ and wind retrievals from Gaofen-3 (GF3) synthetic aperture radar (SAR) wave mode data. The NESZ was estimated from the normalized radar cross-section (NRCS) bottom envelope from the calm sea (winds <1 m/s).
Lin Ren, Lin Ren, Lin Ren, Jinyuan Dai, Jingsong Yang, Jingsong Yang, Chong Jiang, Chong Jiang, Gang Zheng, Gang Zheng, Peng Chen, Xiaohui Li   +11 more
openaire   +2 more sources

Estimating Gully Erosion Induced by Heavy Rainfall Events Using Stereoscopic Imagery and UAV LiDAR

Remote Sensing
Gully erosion, driven by the interplay of natural processes and human activities, results in severe soil degradation and landscape alteration, yet approaches for accurately quantifying erosion triggered by extreme precipitation using multi-source high ...
Lu Wang, Yuan Qi, Wenwei Xie, Rui Yang, Xijun Wang, Shengming Zhou, Yanqing Dong, Xihong Lian   +7 more
doaj   +1 more source

A novel water optical types framework for Chinese inland waters with the application of multitype satellite sensor

International Journal of Digital Earth
Optical Water Type (OWT) analysis is crucial for comprehending water composition and quality, key factors in assessing water quality over extensive areas. However, China’s inland waters lack a standardized system for such analysis.
Ruidan Sang, Yaping Wang, Fangfang Zhang, Shenglei Wang, Junsheng Li   +4 more
doaj   +1 more source

A virtual coastal band-driven optimization-based bathymetric approach (VOBA) for optically shallow water with multispectral imagery

GIScience & Remote Sensing
Bathymetry mapping is important for detecting underwater topography. For optically shallow waters, the use of satellite-based high-spatial-resolution imagery (Such as Gaofen-2, Ziyuan-3, Worldview-2) and historical medium-spatial-resolution imagery ...
Yongming Liu, Shilin Tang, Bin Cao, Zhantang Xu, Xulong Liu, Kai Zeng, Yuye Huang, Wendi Zheng   +7 more
doaj   +1 more source

A Promising Method of Typhoon Wave Retrieval from Gaofen-3 Synthetic Aperture Radar Image in VV-Polarization. [PDF]

Sensors (Basel), 2018
Ji Q, Shao W, Sheng Y, Yuan X, Sun J, Zhou W, Zuo J.   +6 more
europepmc   +1 more source

An Unsupervised Change Detection Method Using Time-Series of PolSAR Images from Radarsat-2 and GaoFen-3. [PDF]

Sensors (Basel), 2018
Liu W, Yang J, Zhao J, Shi H, Yang L.
europepmc   +1 more source

Adaptive Unscented Kalman Filter Phase Unwrapping Method and Its Application on Gaofen-3 Interferometric SAR Data. [PDF]

Sensors (Basel), 2018
Gao Y, Zhang S, Li T, Chen Q, Li S, Meng P.   +5 more
europepmc   +1 more source