Results 101 to 110 of about 12,661 (218)

The Dunhuang chinese sky: a comprehensive study of the oldest known star atlas

open access: yes, 2009
This paper presents an analysis of the star atlas included in the medieval Chinese manuscript (Or.8210/S.3326), discovered in 1907 by the archaeologist Aurel Stein at the Silk Road town of Dunhuang and now held in the British Library.
Bonnet-Bidaud, Jean-Marc   +2 more
core  

Satellite Broadcasting Enabled Blockchain Protocol: A Preliminary Study

open access: yes, 2020
Low throughput has been the biggest obstacle of large-scale blockchain applications. During the past few years, researchers have proposed various schemes to improve the systems' throughput.
Liu, Xiao Fan, Zhang, Ying-Hao
core   +1 more source

Augment BeiDou real-time precise point positioning using ECMWF data

open access: yesEarth, Planets and Space, 2018
The Chinese BeiDou Navigation Satellite System has shown potential for precise positioning with a comparable accuracy to that of the Global Positioning System (GPS) at the centimeter level for the horizontal component and the sub-centimeter level for the
Kemin Zhu   +5 more
doaj   +1 more source

BeiDou Inter-Satellite-Type Bias Evaluation and Calibration for Mixed Receiver Attitude Determination

open access: yesSensors, 2013
The Chinese BeiDou system (BDS), having different types of satellites, is an important addition to the ever growing system of Global Navigation Satellite Systems (GNSS).
Noor Raziq   +2 more
doaj   +1 more source

BeiDou Geostationary Satellite Code Bias Modeling Using Fengyun-3C Onboard Measurements

open access: yesSensors, 2017
This study validated and investigated elevation- and frequency-dependent systematic biases observed in ground-based code measurements of the Chinese BeiDou navigation satellite system, using the onboard BeiDou code measurement data from the Chinese ...
Kecai Jiang   +4 more
doaj   +1 more source

Performance of Ground-Based Global Navigation Satellite System Precipitable Water Vapor Retrieval in Beijing with the BeiDou B2b Service

open access: yesRemote Sensing
The accurate measurement of water vapor is essential for research about and the applications of meteorology, climatology, and hydrology. Based on the BeiDou PPP-B2b service, real-time precipitable water vapor (PWV) can be retrieved with the precise point
Yunchang Cao   +5 more
doaj   +1 more source

GPS Multipath Detection in the Frequency Domain

open access: yes, 2016
Multipath is among the major sources of errors in precise positioning using GPS and continues to be extensively studied. Two Fast Fourier Transform (FFT)-based detectors are presented in this paper as GPS multipath detection techniques. The detectors are
Amani, Elie   +5 more
core  

Optimized Design and Analysis of Offshore Beidou Maritime Foundation Reinforcement System Pseudolite Ranging-Codes

open access: yesPolish Maritime Research, 2017
Under the bad sea conditions and weak Beidou navigation signal environment, it is difficult to locate the ship on the sea, and the Beidou navigation system can’t work well.
Su Deliang   +3 more
doaj   +1 more source

and Navigation Group at DLR’s German Space Operations [PDF]

open access: yes
member of the Executive and Governing Board of ...
C. Rizos   +7 more
core  

Twenty-year continuous operation of Syowa IGS station [PDF]

open access: yes, 2017
第8回極域科学シンポジウム/個別セッション:[OG] 極域地圏12月5日(火)国立極地研究所 3階セミナー室The Eighth Symposium on Polar Science/Ordinary sessions: [OG] Polar GeosciencesTue.

core   +1 more source

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