Results 11 to 20 of about 84,389 (169)

Dual Quaternion Based Close Proximity Operation for In-Orbit Assembly via Model Predictive Control

open access: yesInternational Journal of Aerospace Engineering, 2021
This paper studies the problem of guidance and control for autonomous in-orbit assembly. A six-degree-of-freedom (6-DOF) motion control for in-orbit assembly close proximity operation between a service satellite and a target satellite is addressed in ...
Chuqi Sun   +3 more
doaj   +1 more source

Self-Organizing Method on Mission-Level Task Allocation of Large-Scale Remote Sensing Satellite Swarm

open access: yesInternational Journal of Aerospace Engineering, 2022
Distributed self-organization and self-management is an ideal way to achieve an autonomous and efficient operation of large-scale remote sensing satellite swarm.
Yang Jiang   +5 more
doaj   +1 more source

BOC Signal Acquisition Algorithm Based on Similar Enfoldment

open access: yesInternational Journal of Aerospace Engineering, 2020
A BOC signal has been widely used in the Global Navigation Satellite System (GNSS). Although the BOC signal has many advantages, the autocorrelation function (ACF) of the BOC signal has lots of peaks, which makes signal acquisition difficult.
Qi Han   +5 more
doaj   +1 more source

FY-3C/VIRR Sea Surface Temperature Products and Quality Validation

open access: yes应用气象学报, 2020
Sea surface temperature (SST) products are generated at National Satellite Meteorological Center (NSMC) of China Meteorological Administration (CMA) from the visible and infrared radiometer (VIRR) on board FY-3C polar orbiting satellite.
Wang Sujuan   +8 more
doaj   +1 more source

SMI Compatible Simulation Scheduler Design for Reuse of Model Complying with SMP Standard [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
Software reusability is one of key factors which impacts cost and schedule on a software development project. It is very crucial also in satellite simulator development since there are many commercial simulator models related to satellite and dynamics.
Cheol-Hea Koo   +2 more
doaj   +1 more source

Supplementary open dataset for WiFi indoor localization based on received signal strength

open access: yesSatellite Navigation, 2022
Several Wireless Fidelity (WiFi) fingerprint datasets based on Received Signal Strength (RSS) have been shared for indoor localization. However, they can’t meet all the demands of WiFi RSS-based localization.
Jingxue Bi   +5 more
doaj   +1 more source

Vulnerabilities and integrity of precise point positioning for intelligent transport systems: overview and analysis

open access: yesSatellite Navigation, 2021
The implementation of Intelligent Transport System (ITS) technology is expected to significantly improve road safety and traffic efficiency. One of the key components of ITS is precise vehicle positioning. Positioning with decimetre to sub-metre accuracy
Yujun Du   +3 more
doaj   +1 more source

A multipath mitigation algorithm for GNSS signals based on the steepest descent approach

open access: yesSatellite Navigation, 2022
Multipath interference seriously degrades the performance of Global Navigation Satellite System (GNSS) positioning in an urban canyon. Most current multipath mitigation algorithms suffer from heavy computational load or need external assistance.
Wenqi Qiu   +5 more
doaj   +1 more source

Status of CAS global ionospheric maps after the maximum of solar cycle 24

open access: yesSatellite Navigation, 2021
As a new Ionosphere Associate Analysis Center (IAAC) of the International GNSS Service (IGS), Chinese Academy of Sciences (CAS) started the routine computation of the real-time, rapid, and final Global Ionospheric Maps (GIMs) in 2015.
Zishen Li   +7 more
doaj   +1 more source

Method of Tower-less Calibration for Phase Parameter of Tracking System

open access: yesMATEC Web of Conferences, 2015
This paper introduced the principle of angle errors in tracking system. The demodulation was only related to signal envelop, and supported the phase calibration of radio star.
Ge Tiezhi   +4 more
doaj   +1 more source

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