Results 71 to 80 of about 40,312,078 (138)

Nearshore topography retrieval based on wave spectrum inverted from Gaofen-3 image

Geo-spatial Information Science
This paper aims to propose a nearshore water depth retrieval method using Chinese Gaofen-3 (GF-3) synthetic aperture radar (SAR) imagery. By applying a deep learning-based multi-layer perceptron (MLP) approach, one-dimensional wave spectra are inverted ...
Mengyu Hao, Weizeng Shao, Yuyi Hu, Maurizio Migliaccio, Xingwei Jiang   +4 more
doaj   +1 more source

Exploring the Links Between Variations in Snow Cover Area and Climatic Variables Across the Upper Indus Basin Under a Changing Climate

International Journal of Climatology, Volume 46, Issue 2, February 2026.
Google Earth Engine was utilised to assess snow cover area (SCA) across eight Upper Indus Basin (UIB) subbasins, employing ARIMA for prediction and comparing MODIS datasets using Dunn's test. Spatiotemporal changes were analysed using MK, Sen's slope, and other statistical tests.
Hafsa Muzammal, Muhammad Zaman, Jaehak Jeong, Kashif Mehmood, Syed Aftab Wajid   +4 more
wiley   +1 more source

Wide Swath Stereo Mapping from Gaofen-1 Wide-Field-View (WFV) Images Using Calibration [PDF]

, 2018
The development of Earth observation systems has changed the nature of survey and mapping products, as well as the methods for updating maps. Among optical satellite mapping methods, the multiline array stereo and agile stereo modes are the most common ...
Huang, W., Ruizhi Chen, Wenchao Huang, Shoubin Chen, Chen, R., Jingbin Liu, Chen, S., Liu, Jingbin   +7 more
core   +1 more source

Radiometric and Polarimetric Quality Validation of Gaofen-3 over a Five-Year Operation Period

, 2023
GaoFen-3 was the first Chinese civilian C-band synthetic aperture radar (SAR) satellite, launched in August 2016. The need for monitoring the satellite’s image quality has been boosted by its widespread applications in various fields. The efficient
Jie Yang, Shanwei Liu, Pingxiang Li, Weidong Sun, Le Yang, Lingli Zhao, Deren Li, Lei Shi   +7 more
core   +1 more source

GCD‐Net: A Gated and Cross‐Dynamically Enhanced Network for Accurate Extraction of Offshore Raft Aquaculture

IET Image Processing, Volume 20, Issue 1, January/December 2026.
This study proposes a Gated and Cross‐Dynamically Enhanced Network (GCD‐Net) for accurate extraction of offshore raft aquaculture from Sentinel‐2 imagery. GCD‐Net integrates novel gated residual blocks, cross‐guided attention, and dynamic attention ASPP modules to enhance feature representation and boundary precision.
Yu Wang, Lianwei Li, Cunjin Xue, Zhi Zheng, Shiyu Wu   +4 more
wiley   +1 more source

Ship Detection in Gaofen-3 SAR Images Based on Sea Clutter Distribution Analysis and Deep Convolutional Neural Network

, 2018
Target detection is one of the important applications in the field of remote sensing. The Gaofen-3 (GF-3) Synthetic Aperture Radar (SAR) satellite launched by China is a powerful tool for maritime monitoring. This work aims at detecting ships in GF-3 SAR
Hongjian You, Quanzhi An, Zongxu Pan
core   +1 more source

Wave retrieval from quad-polarized Chinese Gaofen-3 SAR image using an improved tilt modulation transfer function

Geo-spatial Information Science
An accurate Modulation Transfer Function (MTF) is essential for Synthetic Aperture Radar (SAR) wave spectra retrieval. This study aimed to investigate the performance of a quad-polarized wave retrieval algorithm based on fully polarimetric SAR image data
Weizeng Shao, Yuyi Hu, Xingwei Jiang, Youguang Zhang   +3 more
doaj   +1 more source

DWD‐Net: A Feature Enhancement Network for Detecting Small‐Scale Ships in Synthetic Aperture Radar Imagery

IET Image Processing, Volume 20, Issue 1, January/December 2026.
Synthetic aperture radar (SAR) ship detection remains challenging due to inherent speckle noise, complex sea clutter, variable target scales, and arbitrary ship poses. This paper develops a YOLOv11‐based multi‐scale feature enhancement network, namely DWD‐Net, by integrating deformable convolution v4, a stochastic multi‐scale pooling attention ...
Niu Yameng, Hu Shengliang, Liu Yiping, Wu Hai, Yang Chen   +4 more
wiley   +1 more source

Cross-sensor cropland mapping: evaluating Chinese satellites and Sentinel-2 in the Nile Delta

International Journal of Digital Earth
Expanding the global application of Chinese Earth Observation satellites (CEOSs) data can enhance Earth observation capabilities, especially in data-scarce regions.
Zihang Lou, Xuxiang Feng, Yulong Lv, Yizhou Zhang, Hao Peng, Mingxian Zhao, Ke Liu, Hongyan Wang, Yaqiong Zhang, Pengyang Wang, Tongyao Niu, Le Yu, Dailiang Peng   +12 more
doaj   +1 more source

A Three-Hierarchy Evaluation of Polarimetric Performance of GF-3, Compared with ALOS-2/PALSAR-2 and RADARSAT-2

Sensors, 2019
GaoFen-3 (GF-3) is the first Chinese civilian multi-polarization synthetic aperture radar (SAR) satellite, launched on 10 August of 2016, and put into operation at the end of January 2017.
Zezhong Wang, Jian Jiao, Qiming Zeng, Junyi Liu   +3 more
doaj   +1 more source