Results 11 to 20 of about 3,586,600 (279)

Research on optimization method of reconnaissance constellation based on multi-objective evolutionary algorithm [PDF]

open access: yesZhihui kongzhi yu fangzhen
In order to further solve the optimization problem of reconnaissance constellation and strengthen the construction of space-based reconnaissance system, the current optimization methods of reconnaissance constellation are studied and summarized.
LIU Yali, XIONG Wei
doaj   +2 more sources

Multi-Constellation Software-Defined Receiver for Doppler Positioning with LEO Satellites [PDF]

open access: yesSensors, 2020
A Multi-Constellation Software-Defined Receiver (MC-SDR) is designed and implemented to extract the Doppler measurements of Low Earth Orbit (LEO) satellite’s downlink signals, such as Orbcomm, Iridium-Next, Globalstar, Starlink, OneWeb, SpaceX, etc.
Farzan Farhangian, René Landry
openaire   +5 more sources

Benefits of Multi-Constellation/Multi-Frequency GNSS in a Tightly Coupled GNSS/IMU/Odometry Integration Algorithm [PDF]

open access: yesSensors, 2018
Localization algorithms based on global navigation satellite systems (GNSS) play an important role in automotive positioning. Due to the advent of autonomously driving cars, their importance is expected to grow even further in the next years ...
Björn Reuper   +2 more
doaj   +2 more sources

Multi-objective optimization of earth cooperative observation hybrid satellite constellation

open access: yesXibei Gongye Daxue Xuebao, 2021
As the demand for comprehensiveness, accuracy, and data fast return of satellite remote sensing information grows, a hybrid constellation with permanent inter-satellite link becomes an inevitable choice for earth cooperative observation.
Boyong He   +3 more
doaj   +3 more sources

Topology control of satellite networks for multi-layer and multi-domain mega-constellation [PDF]

open access: yesTongxin xuebao
In view of the time-varying nature of the single-satellite mission in the mega constellation, the resulting overload, the vulnerability of a single node, and the high reliability requirements of the network control plane, the topology control of ...
XU Xiaofan   +5 more
doaj   +4 more sources

Research on Covert Communication in Satellite–Ground-Integrated Sensor Networks Based on FH-DL-MPWFRFT [PDF]

open access: yesSensors
To further enhance the covert communication capability of satellite–ground-integrated sensor networks, a dual-polarization constellation joint modulation scheme based on frequency-hopping double-layer multi-parameter weighted fractional Fourier transform
Lei Ni   +5 more
doaj   +2 more sources

Fast Screening Algorithm for Satellites Based on Multi-Constellation System

open access: yesElectronics
This paper proposes a fast satellite screening algorithm aimed at the problem of balancing between positioning accuracy and system computing efficiency in a multi-constellation system environment under the Global Navigation Satellite System (GNSS).
Weidong Zhou, Zhiqiang Wu
openaire   +2 more sources

Self-organising satellite constellation in geostationary Earth orbit [PDF]

open access: yes, 2015
This paper presents a novel solution to the problem of autonomous task allocation for a self-organizing satellite constellation in Earth orbit. The method allows satellites to cluster themselves above targets on the Earth’s surface.
Colombo, Camilla   +3 more
core   +3 more sources

Optimized Selection of Satellite Subsets for a Multi-constellation GBAS [PDF]

open access: yesThe International Technical Meeting of the The Institute of Navigation, 2016
In the next generation of Ground Based Augmentation System (GBAS) corrections and integrity parameters for two frequencies and multiple constellations will be provided. However, the capacity of the VDB (VHF Data Broadcast) link providing those parameters to users is strongly limited.
Gerbeth, Daniel   +3 more
openaire   +4 more sources

Autonomous control of a reconfigurable constellation of satellites on geostationary orbit with artificial potential fields [PDF]

open access: yes, 2012
This paper presents a method of controlling a constellation of small satellites in Geostationary Earth Orbit (GEO) such that the constellation is able to reconfigure - changing the angular position of its members relative to the Earth’s surface in order ...
Colombo, Camilla   +2 more
core   +3 more sources

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