Results 21 to 30 of about 18,581 (162)
Development Status and Trend of Space Optical Communication Technology
天地一体化信息网络, 2022 Based on the laser inter-satellite communication link to realize information transmission between diff erent satellite nodes in satellite constellation, it can solve the problems of slow data rate and limited frequency resources in traditional satellite ...
Shaowen LU +5 more
doaj +2 more sources
Vulnerability of Satellite Quantum Key Distribution to Disruption from Ground-Based Lasers
Sensors, 2021 Satellite-mediated quantum key distribution (QKD) is set to become a critical technology for quantum-secure communication over long distances. While satellite QKD cannot be effectively eavesdropped, we show it can be disrupted (or ‘jammed’) with ...
David R. Gozzard +2 more
doaj +1 more source
Remote Sensing, 2022 The GF-7 satellite is China’s first civil sub-meter resolution stereo mapping satellite, aiming at 1:10,000-scale mapping. To achieve this goal, apart from the stereo optical cameras that reach sub-meter resolution, the GF-7 satellite is equipped with a ...
Jiyi Chen +6 more
doaj +1 more source
On-Orbit Geometric Calibration and Accuracy Validation for Laser Footprint Cameras of GF-7 Satellite
Remote Sensing, 2022 The Gaofen-7 (GF-7) satellite uses a two-beam laser altimetry system in which each beam is equipped with a laser footprint camera (LFC) to provide geometric processing of the laser footprint images that assist in optical image stereo mapping.
Jiyi Chen +6 more
doaj +1 more source
ICESAT-2 LASER ALTIMETRY DATA-GUIDED HIGH-ACCURACY POSITIONING OF SATELLITE STEREO IMAGES [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Positioning accuracy is a key indicator that restricts the accuracy of satellite image mapping. Laser altimetry acquires surface height in decimeters or higher accuracy, providing high-accuracy topographic information for satellite photogrammetry.
S. Zou +5 more
doaj +1 more source
Laser location of satellites [PDF]
Astronomical School’s Report, 2002 History of beginnings of extraterrestrial objects laser location, its development in Ukraine, description of transmitting and receiving equipment of laser location stations are considered. Opportunities for their properties optimization are shown.
Yu. S. Denischik +2 more
openaire +2 more sources
Geodesy and GeodynamicsA high-precision regional gravity field model is significant in various geodesy applications. In the field of modelling regional gravity fields, the spherical radial basis functions (SRBFs) approach has recently gained widespread attention, while the ...
Fang Zhang, Huanling Liu, Hanjiang Wen
doaj +1 more source
Interference and Protection in Satellite Laser Communication
天地一体化信息网络, 2023 In order to explore the safety protection technologies for various external interferences in satellite laser communication, four interference sources in the satellite laser communication link and their principles were introduced, included atmospheric ...
Chenzhe LAO, Jianfeng SUN
doaj +2 more sources
Dynamic Network Formation for FSO Satellite Communication
Applied Sciences, 2022 Satellite network optimization is essential, particularly since the cost of manufacturing, launching and maintaining each satellite is significant. Moreover, classical communication optimization methods, such as Minimal Spanning Tree, cannot be applied ...
Revital Marbel +3 more
doaj +1 more source
Fine Calibration Method for Laser Altimeter Pointing and Ranging Based on Dense Control Points
Remote SensingSatellite laser altimetry technology, a novel space remote sensing technique, actively acquires high-precision elevation information about the Earth’s surface.
Chaopeng Xu +5 more
doaj +1 more source