Results 11 to 20 of about 937 (251)

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   +3 more sources

A Novel Signal Design and Performance Analysis in NavCom Based on LEO Constellation [PDF]

open access: yesSensors, 2021
The mega-launch of low Earth orbit satellites (LEOs) represents a critical opportunity to integrate navigation and communication (NavCom), but first, challenges related to signal design must be overcome. This article proposes a novel signal scheme named CE-OFDM-PM.
Jing Ji   +5 more
openaire   +3 more sources

Cost-Efficient LEO Navigation Augmentation Constellation Design under a Constrained Deployment Approach

open access: yesInternational Journal of Aerospace Engineering, 2021
The advantages of the Low Earth Orbit (LEO) satellite include low-latency communications, shorter positioning time, higher positioning accuracy, and lower launching, building, and maintenance costs.
Jing Ren   +4 more
doaj   +1 more source

LEO computing satellite constellation design for heterogeneous QoS requirements

open access: yes物联网学报
The rapidly increasing number of Internet of things devices poses significant challenges to the service capabilities of terrestrial networks. Ultra-dense low earth orbit satellite constellations have emerged as a promising solution to address the limited
PENG Yuming, SUN Yijing, DI Boya
doaj   +1 more source

Low-Orbit Large-Scale Communication Satellite Constellation Configuration Performance Assessment

open access: yesInternational Journal of Aerospace Engineering, 2022
A constellation configuration performance evaluation method is proposed for the performance evaluation of the low-orbit large-scale communication satellite constellations.
Tianyu Sun, Min Hu, Chaoming Yun
doaj   +1 more source

Optimal Progressive Pitch for OneWeb Constellation with Seamless Coverage

open access: yesSensors, 2022
Large-scale broadband low earth orbit (LEO) satellite systems have become a possibility due to decreased launch costs and rapidly evolving technology. Preventing huge LEO satellite constellations from interfering with the geostationary earth orbit (GSO ...
Cheng Zou   +5 more
doaj   +1 more source

Extended Geometry and Probability Model for GNSS+ Constellation Performance Evaluation

open access: yesRemote Sensing, 2020
We proposed an extended geometry and probability model (EGAPM) to analyze the performance of various kinds of (Global Navigation Satellite System) GNSS+ constellation design scenarios in terms of satellite visibility and dilution of precision (DOP) et al.
Lingdong Meng   +4 more
doaj   +1 more source

The Design and Maintenance of Low-Orbit Navigation Constellation for Traffic Control in a Smart City

open access: yesSensors, 2022
The traffic control issue in the smart city scenario gives rise to the higher requirements of Global Navigation Satellite System (GNSS) services, especially in terms of navigation accuracy, together with coverage continuity, and multiplicity.
Yi Zheng, Baojun Lin, Rui Li, Yutong Liu
doaj   +1 more source

An orbit optimization method for low earth orbit electronic reconnaissance constellation [PDF]

open access: yesZhihui kongzhi yu fangzhen
Low-orbit constellation is a hot spot in the field of aerospace in recent years, which shows many advantages in the fields of communication, navigation, reconnaissance and so on.
HUANG Yuting, YANG Yining, ZHU Ziyi, GAO Weijie, DONG Yuxiang, LIU Xiangyang
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

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