Results 21 to 30 of about 13,414,772 (267)
Data Quality Evaluation of Sentinel-1 and GF-3 SAR for Wind Field Inversion
Remote Sensing, 2021 Synthetic aperture radar (SAR) is an important means to observe the sea surface wind field. Sentinel-1 and GF-3 are located on orbit SAR satellites, but the SAR data quality of these two satellites has not been evaluated and compared at present.
Yong Wan +4 more
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Journal of Combinatorial Theory, Series A, 1980 AbstractA lower bound {14(4q + 5)}12 + 32 is given for the minimum weight of the symmetry code C(q) over GF(3), which is introduced by Pless [3].
Ito, Noboru
core +3 more sources
Matroid representation over GF(3)
Journal of Combinatorial Theory, Series B, 1979 AbstractWe show that a matroid is representable over GF(3) if and only if no minor is the five-point line or the Fano matroid, or their duals. Tutte's famous characterization of the regular matroids is a corollary. A key lemma states that two representations of the same matroid in the same vector space over GF(3) may be transformed one into the other ...
Seymour, P.D
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International Journal of Digital EarthChina is advancing toward its carbon peak and neutrality goals, in which accurate above-ground biomass (AGB) estimation is crucial. In this study, GF-1, GF-3, and their combined data from Yiliang and Puer were used, testing KNN and two enhanced ...
Wangfei Zhang +8 more
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Decimeter-Level Geolocation Accuracy Updated by a Parametric Tropospheric Model with GF-3 [PDF]
Sensors, 2018 GaoFen-3 (GF-3) is a multi-polarization C-band synthetic aperture radar (SAR) satellite in China with a resolution of up to 1 m. Up to now, the geolocation accuracy of GF-3 could be improved to 3 m. According to the current study, there still exist meter-
Wentao Wang, Jiayin Liu, Xiaolan Qiu
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Road Detection Based on Shearlet for GF-3 Synthetic Aperture Radar Images
IEEE Access, 2020 GF-3 satellite is China's first C-band multi-polarized synthetic aperture radar (SAR) satellite with the 1-meter resolution, which has been widely used in various fields. Road detection for GF-3 SAR images is an important part of the application of GF-3,
Zengguo Sun +4 more
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POLARIMETRIC CALIBRATION AND ASSESSMENT OF GF-3 IMAGES IN STEPPE [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 Abstract. The GaoFen-3 (GF-3) satellite is the first fully polarimetric synthetic aperture radar (PolSAR) satellite in China. It has three fully polarimetric imaging modes and is available for many applications. The system has been taken on several calibration experiments after the launch in Inner Mongolia by the Institute of Electronics, Chinese ...
Y. Chang +5 more
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THE STUDY OF RESIDENTIAL AREAS EXTRACTION BASED ON GF-3 TEXTURE IMAGE SEGMENTATION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 The study chooses the standard stripe and dual polarization SAR images of GF-3 as the basic data. Residential areas extraction processes and methods based upon GF-3 images texture segmentation are compared and analyzed.
G. Shao +6 more
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Geo-Positioning Accuracy Improvement of Multi-Mode GF-3 Satellite SAR Imagery Based on Error Sources Analysis [PDF]
Sensors, 2018 The GaoFen-3 (GF-3) satellite is the only synthetic aperture radar (SAR) satellite in the High-Resolution Earth Observation System Project, which is the first C-band full-polarization SAR satellite in China.
Niangang Jiao +4 more
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Affinely totally variant subsets of V3(GF(3))
Discrete Mathematics, 1981 AbstractIn this note, we construct affinely totally variant subsets of V3(GF(3)) by using the vertex type of a hypergraph.
Zhu, L.
openaire +3 more sources