Results 11 to 20 of about 753 (114)

Design of a Low Earth Orbit Constellation for Regional Navigation Mission [PDF]

open access: yesعلوم، فناوری و کاربردهای فضایی, 2023
This research is going to present design of a LEO Constellation for Navigation service with minimum number of Satellites. The goal is to achieve Dilution Of Precision (DOP) less than 6.
Sajjad Ghazanfarinia   +3 more
doaj   +1 more source

Seeking Optimal GNSS Radio Occultation Constellations Using Evolutionary Algorithms

open access: yesRemote Sensing, 2019
Given the great achievements of the Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) mission in providing huge amount of GPS radio occultation (RO) data for weather forecasting, climate research, and ionosphere monitoring,
Xiaohua Xu   +4 more
doaj   +1 more source

Application Status and Analysis of Starlink Constellation

open access: yes天地一体化信息网络, 2023
Starlink, asatellite broadband constellation operated by SpaceX, is currently the most influential and promising LEO broadband satellite constellation.With the expansion of the constellation deployment, its high-frequency launch and batch deployment of ...
Yu WANG   +6 more
doaj   +2 more sources

LEO Precise Orbit Determination with Inter-satellite Links

open access: yesRemote Sensing, 2019
Traditional precise orbit determination (POD) for low Earth orbit (LEO) satellites relies on observations from ground stations and onboard receivers.
Xingxing Li   +5 more
doaj   +1 more source

Design and performance evaluation of a novel ranging signal based on an LEO satellite communication constellation

open access: yesGeo-spatial Information Science, 2023
Driven by improvements in satellite internet and Low Earth Orbit (LEO) navigation augmentation, the integration of communication and navigation has become increasingly common, and further improving navigation capabilities based on communication ...
Jingfang Su   +4 more
doaj   +1 more source

On an Ultra-Dense LEO-Satellite-Based Computing Network Constellation Design

open access: yesEngineering
Commercial ultra-dense low-Earth-orbit (LEO) satellite constellations have recently been deployed to provide seamless global Internet services. To improve the satellite network transmission efficiency and provide robust wide-coverage computing services ...
Yijing Sun   +3 more
doaj   +1 more source

Geocentric Spherical Surfaces Emulating the Geostationary Orbit at Any Latitude with Zenith Links

open access: yesFuture Internet, 2020
According to altitude, the orbits of satellites constellations can be divided into geostationary Earth orbit (GEO), medium Earth orbit (MEO), and low Earth orbit (LEO) constellations.
Emilio Matricciani
doaj   +1 more source

LEO Satellite Constellation for Global-Scale Remote Sensing With On-Orbit Cloud AI Computing

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
This article proposes a new satellite-based framework for global-scale remote sensing that is integrated with on-orbit cloud computing and artificial intelligence (AI) services.
Yuejin Li   +4 more
doaj   +1 more source

Research on Design and Staged Deployment of LEO Navigation Constellation for MEO Navigation Satellite Failure

open access: yesRemote Sensing
Low Earth orbit (LEO) satellites have unique advantages in navigation because of their high signal intensity and rapid geometric changes in a short period.
Wen Xue   +4 more
doaj   +1 more source

Technical assessment of an equatorial Low Earth orbit satellite constellation for Egypt

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2022
Egypt, the region’s agricultural powerhouse, has the largest irrigation area among the eleven Nile Basin countries. Meanwhile, the demand for water and irrigation management is becoming necessary.
Haitham Akah, Dalia Elfiky
doaj   +1 more source

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