Results 21 to 30 of about 115,982 (303)

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

Geo-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, Bofeng Li, Song Jia, Liangwei Nie, Tianhao Wu, Zhe Yang, Jingzhe Shang, Yanning Zheng, Maorong Ge   +8 more
doaj   +1 more source

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

Remote 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

Forward modeling of spaceborne radar observations [PDF]

Atmospheric 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

A passive satellite deorbiting strategy for MEO using solar radiation pressure and the J2 effect [PDF]

, 2011
The growing population of space debris poses a serious risk to the future of space flight. To effectively manage the increase of debris in orbit, end-of life disposal has become a key requirement for future missions.
Colombo, Camilla, McInnes, Colin, Lucking, Charlotte, McInnes, Colin R.   +3 more
core   +1 more source

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

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, Liu LIU, Jiachi ZHANG, Tao ZHOU, Wei LIN, Yiqun LIANG   +5 more
doaj   +2 more sources

Orbit design for future SpaceChip swarm missions in a planetary atmosphere [PDF]

, 2012
The effect of solar radiation pressure and atmospheric drag on the orbital dynamics of satellites-on-a-chip (SpaceChips) is exploited to design equatorial long-lived orbits about the oblate Earth.
Colombo, Camilla, McInnes, Colin
core   +1 more source

Joint optimization based satellite handover strategy for low earth orbit satellite networks

IET Communications, 2021
Low earth orbit constellation satellite communication has the characteristics of low propagation delay, low path loss, low launch cost and wide range of applications.
Yifei Liu, Lang Feng, Liang Wu, Zaichen Zhang, Jian Dang, Bingcheng Zhu, Lei Wang   +6 more
doaj   +1 more source

Routing optimization based on topology control in satellite network

Tongxin xuebao, 2018
A new double-layer satellite network model for space networking was established and a routing algorithm based on topology control (TCRA) was proposed considering the advantages of low earth orbit and stationary earth orbit satellite networks.This model ...
Xiaogang QI, Jiulong MA, Lifang LIU
doaj   +2 more sources

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

Realistic Earth escape strategies for solar sailing [PDF]

, 2005
With growing interest in solar sailing comes the requirement to provide a basis for future detailed planetary escape mission analysis by drawing together prior work, clarifying and explaining previously anomalies.
Macdonald, Malcolm, Colin R. McInnes, Malcolm Macdonald, Macdonald, M., McInnes, Colin R., McInnes, C.R.   +5 more
core   +1 more source