Results 11 to 20 of about 6,131 (159)

Challenges of Using the L-Band and S-Band for Direct-to-Cellular Satellite 5G-6G NTN Systems

open access: yesTechnologies, 2023
This article presents a comprehensive study of the potential utilization of the L-band and S-band frequency ranges for satellite non-terrestrial network (NTN) technologies.
Alexander Pastukh   +3 more
doaj   +1 more source

Spatial Geometry Design of a Low Earth Orbit Constellation for Iranian Regional Navigation Satellite System [PDF]

open access: yesJournal of Aerospace Technology and Management, 2021
The regional navigation satellite system (RNSS) is recently used in some countries to cover or enhance their local navigation. The most important satellite navigation systems to date are in the Earth medium orbit (MEO) and Earth synchronous Earth orbit ...
Reza Zardashti, Shiva Emami
doaj   +2 more sources

Survey of Low Earth Orbit Satellite Communication Network Routing Technology

open access: yes天地一体化信息网络, 2022
Low earth orbit satellite communication network is an important part of the internet of everything era, but the characteristics of satellite constellation topology such as high dynamic, limited heterogeneous resources and unbalanced network service ...
Shuang ZHENG, Xing ZHANG, Wenbo WANG
doaj   +2 more sources

Study the Effect of Solar Radiation Pressure at Several Satellite Orbits

open access: yesمجلة بغداد للعلوم, 2013
The effects of solar radiation pressure at several satellite (near Earth orbit satellite, low Earth orbit satellite, medium Earth orbit satellite and high Earth orbit satellite ) have been investigated.
Baghdad Science Journal
doaj   +1 more source

Measuring a Low-Earth-Orbit Satellite Network

open access: yes2023 IEEE 34th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2023
Starlink and alike have attracted a lot of attention recently, however, the inner working of these low-earth-orbit (LEO) satellite networks is still largely unknown. This paper presents an ongoing measurement campaign focusing on Starlink, including its satellite access networks, gateway and point-of-presence structures, and backbone and Internet ...
Pan, Jianping, Zhao, Jinwei, Cai, Lin
openaire   +2 more sources

LEO Enhanced Global Navigation Satellite System (LeGNSS): progress, opportunities, and challenges

open access: yesGeo-spatial Information Science, 2021
With the completion of Chinese BeiDou Navigation Satellite System (BDS), the world has begun to enjoy the Positioning, Navigation, and Timing (PNT) services of four Global Navigation Satellite Systems (GNSS).
Haibo Ge   +8 more
doaj   +1 more source

Signal Occlusion-Resistant Satellite Selection for Global Navigation Applications Using Large-Scale LEO Constellations

open access: yesRemote Sensing, 2023
With the continuous construction of large-scale Low Earth Orbit (LEO) constellations, their potential for Global Navigation Satellite System (GNSS) applications has been emphasized.
Junqi Guo, Yang Wang, Chenyang Sun
doaj   +1 more source

T3P: Demystifying Low-Earth Orbit Satellite Broadband

open access: yes, 2023
The Internet is going through a massive infrastructural revolution with the advent of low-flying satellite networks, 5/6G, WiFi7, and hollow-core fiber deployments. While these networks could unleash enhanced connectivity and new capabilities, it is critical to understand the performance characteristics to efficiently drive applications over them.
Tiwari, Shubham   +10 more
openaire   +2 more sources

Forward modeling of spaceborne radar observations [PDF]

open access: yesAtmospheric Measurement Techniques
Accurate forward models, particularly radiative transfer models, are essential for the assimilation of both passive and active satellite observations in modern data assimilation frameworks.
I. Moradi, I. Moradi, S. Kalluri, Y. Zhu
doaj   +1 more source

Review of the Development of Low Earth Orbit Satellite Communication for Smart High-Speed Railway

open access: yes天地一体化信息网络, 2023
Low-earth orbit satellites have the advantages of wide bandwidth, low latency, and large coverage, making them very suitable as a supplement to ground cellular networks.Low-earth orbit satellites can meet the requirements of smart high-speed railway full
Zhaoyang SU   +5 more
doaj   +2 more sources

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