Results 51 to 60 of about 8,032,225 (166)

Laser Spot Center Location Method for Chinese Spaceborne GF-7 Footprint Camera

Sensors, 2020
The Gaofen-7 (GF-7) satellite is equipped with two area array sensor footprint cameras to capture the laser altimeter spot. In order to establish a direct correspondence between the laser data and the stereo image data, a new method is proposed to fit ...
Chaofeng Ren, Junfeng Xie, Xiaodong Zhi, Yun Yang, Shuai Yang   +4 more
doaj   +1 more source

Centroid Extraction of Laser Spots Captured by Infrared Detectors Combining Laser Footprint Images and Detector Observation Data

Remote Sensing, 2023
On-orbit geometric calibration of satellite-borne laser based on infrared detectors is the key tool to ensure the elevation measurement accuracy, and the accuracy of on-orbit geometric calibration is directly determined by laser spots captured by ...
Xiaomeng Yang, Junfeng Xie, Ren Liu, Fan Mo, Junze Zeng   +4 more
doaj   +1 more source

A Novel Ship-Tracking Method for GF-4 Satellite Sequential Images

, 2018
The geostationary remote sensing satellite has the capability of wide scanning, persistent observation and operational response, and has tremendous potential for maritime target surveillance.
Yong Liu, Libo Yao, You He
core   +1 more source

Fine Calibration Method for Laser Altimeter Pointing and Ranging Based on Dense Control Points

Remote Sensing
Satellite laser altimetry technology, a novel space remote sensing technique, actively acquires high-precision elevation information about the Earth’s surface.
Chaopeng Xu, Fan Mo, Xiao Wang, Xiaomeng Yang, Junfeng Xie, Zhen Wen   +5 more
doaj   +1 more source

Geometric Calibration and Accuracy Verification of the GF-3 Satellite

, 2017
The GF-3 satellite is the first multi-polarization synthetic aperture radar (SAR) imaging satellite in China, which operates in the C band with a resolution of 1 m.
Fengcheng Guo, Guo Zhang, Ruishan Zhao, Kai Xu, Mingjun Deng   +4 more
core   +1 more source

Drag-free and attitude control for the GOCE satellite [PDF]

, 2008
The paper concerns Drag-Free and Attitude Control of the European satellite Gravity field and steady-state Ocean Circulation Explorer (GOCE) during the science phase.
Canuto, Enrico
core   +1 more source

GF-GMD/ccpp-physics: GMD-paper branch

, 2021
The GF code for the part 3.1 "The trimodal characteristics revealed by single-column simulations" of "The Grell–Freitas (GF) convection parameterization: recent developments, extensions, and applications" by Saulo R. Freitas, Georg A.
Georg. A. Grell, Haiqin Li, Saulo R. Freitas   +2 more
core   +1 more source

Urban Green Space Canopy Height Retrieval in Beijing Using GF-7 Stereo Pairs: A Multi-Source Feature Fusion Theoretical Framework and Its Application to Urban Ecological Assessment

Remote Sensing
Urban canopy height is an essential indicator for characterizing vegetation structure and carbon sequestration, yet satellite LiDAR often lacks sufficient spatial resolution, airborne LiDAR is costly, and SAR has limited sensitivity to vegetation ...
Bin Li, Shaowei Lu, Man Wang, Xinbing Yang, Yingrui Duan, Xu Liu, Na Zhao, Xiaotian Xu, Shaoning Li   +8 more
doaj   +1 more source

THE RESEARCH ON LUCALIBRATION OF GF-4 SATELLITE [PDF]

, 2018
Starting from the lunar observation requirements of the GF-4 satellite, the main index such as the resolution, the imaging field, the reflect radiance and the imaging integration time are analyzed combined with the imaging features and parameters of this
W. Tan, W. Qi
core   +1 more source

Gf(3) Ve Gf(7) Üzerindeki Yarı-Devirli Kodlar [PDF]

, 2008
Any cyclic code with n=pm length can be put into quasi-cyclic form ,where p ? 1, p,m + ? Z . In this paper, some parameters of the Quasi-Cyclic codes over GF(3) and GF(7) are obtained by using the best known cyclic codes.p, m pozitif tamsayılar ve p ?
Öke, Figen, İşcan, Hülya, Çengellenmiş, Yasemin   +2 more
core   +1 more source