Realtime Precise Orbit Determination Technology for LEO Mega-Constellation by Zhen LI, Chuang SHI

“…Supported by GNSS, it analyzed the advantages and disadvantages of solving LEO satellite orbit on the ground or onboard the satellites.The high-fidelity non-conservative force models were applied to the real-time orbit determination algorithm.To separate the kinematic and dynamic orbit determination process had been a great advantage for LEO satellites with much frequent orbital maneuvers.The test results showed that the accuracy of accelerations computed from the radiation pressure and atmospheric drag non-conservation force models were around 5 nm/s².Use the broadcast ephemeris, the real-time orbit determination algorithm could get an accuracy of 0.8 m in the satellites′ positions and 1.1 mm/s accuracy in the satellites′ velocity.When the real-time precise ephemeris of GNSS satellites were provided, the algorithm could get an accuracy of 8 cm in the LEO satellites′ position and 0.1 mm/s in the velocity.The method for real-time orbit determination and orbit prediction in this paper could be used to support the construction of navigation system with the mega-constellations.…”
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Predicting low ionospheric parameters and low frequency sky wave propagation strength using machine learning by Jian Wang, Chengsong Duan, Qiao Yu, Cheng Yang

“…Abstract Studying the propagation prediction of low-frequency (LF) radio waves is very significant for supporting applications in fixed and mobile long-distance communication, remote navigation, and timing service. Therefore, to enhance the predicting accuracy of LF sky wave propagation, we proposed an improved method based on the machine learning method. …”
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An Efficient Solution to Optimal Motion Planning With Provable Safety and Convergence by PANAGIOTIS ROUSSEAS, Charalampos Bechlioulis, Kostas Kyriakopoulos

“…A novel parametrized actor structure is proposed, which guarantees safe and convergent navigation by construction. Concurrently, an efficient scheme for optimizing a mixed state and energy cost function is formulated. …”
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A não-reciprocidade dos programas de cooperação para o desenvolvimento: uma análise bibliométrica by Cristiana Dobre

“…As Edgar Morin said in 1995: « La connaissance est une navigation dans un océan d’incertitudes à travers des archipels de certitudes »”. …”
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Impact on Antijamming Performance of Channel Mismatch in GNSS Antenna Arrays Receivers by Zukun Lu, Junwei Nie, Feiqiang Chen, Gang Ou

“…The performance of antijamming is limited by channel mismatch in global navigation satellite system (GNSS) antenna arrays receivers. …”
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DEEP-SEA LANDING VEHICLE SHAPE DRAG ANALYSIS AND BOW MODELED LINE OPTIMIZATION DESIGN (MT) by ZHANG ZiYao, ZHOU Yue, SUN Yu, LAN YanJun, GUO Wei

“…The optimal latin Hypercube method is used to select sample points for the direct navigation resistance calculation, an approximate model of design variable-resistance was established based on the radial basis function neural network, and the optimal design of landing vehicle bow modeled line was carried out by using the adaptive simulated annealing algorithm. …”
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STABILITY CONTROL MODELLING UNDER DYNAMIC MOTION SCENARIO OF A DIFFERENTIAL DRIVE ROBOT by ADEDOTUN O. OWOJORI, KAYODE F. AKINGBADE, WALIU O. APENA, ERASTUS O. OGUNTI

“…Signal analysis and computer vision techniques serve as leverage to make the design achievable. Localization and navigation referred to as tracking a planned trajectory or moving through paths filled with obstacles in a given space are also included. …”
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Relay Selection and Subcarrier-Pair Based Energy-Efficient Resource Allocation for Multirelay Cooperative OFDMA Networks by Wanming Hao, Shouyi Yang, Wanliang Hao

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Exploring the Feasibility of a 5-Week mHealth Intervention to Enhance Physical Activity and an Active, Healthy Lifestyle in Community-Dwelling Older Adults: Mixed Methods Study by Kim Daniels, Sharona Vonck, Jolien Robijns, Kirsten Quadflieg, Jochen Bergs, Annemie Spooren, Dominique Hansen, Bruno Bonnechère

“…Behavioral patterns such as user session duration, feature use frequency, and navigation paths were analyzed, focusing on engagement metrics and user interactions. …”
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A Way to Automatically Generate Lane Level Traffic Data from Video in the Intersections by Zhongguo Yang, Sikandar Ali, Weilong Ding, Irshad Ahmed Abbasi, Muhammad Faizan Khan

“…Lane level traffic data such as average waiting time and flow data at each turn direction not only enable navigation systems to provide users with more detailed and finer-grained information; it can also pave the way for future traffic congestion prediction. …”
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“Setan Makan Babi”: Narasi Woodard dan Masyarakat Muslim di Pesisir Teluk Palu dan Jaringannya Akhir Abad XVIII by Mohammad Nur Ahsan

“…Simultaneously, the network confirmed the route navigation map to the East from the Ming Dynasty, dating back to the early fifteenth century.…”
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An improved coarse alignment algorithm for SINS based on rotation modulation by Yong Yang, Donglin Li, Lingbing Kong, Kaijun Xu, Honghui Xiang

“…Coarse alignment in strapdown inertial navigation systems (SINSs) is a critical step in ensuring initial alignment and the proper functioning of the system. …”
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Improvement of Carrier Phase Tracking Based on a Joint Vector Architecture by Shaohua Chen, Yang Gao

“…Usually, the carrier phase measurements are generated from the phase lock loop in a conventional Global Navigation Satellite System (GNSS) receiver. However there is a dilemma problem to the design of the loop parameters in a conventional tracking loop. …”
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Statistical Study on the Effect of Meridional Neutral Wind on the Occurrence of Post‐Sunset Equatorial Ionospheric Irregularities by Bantayehu Aderaw, Melessew Nigussie

“…Abstract The navigation and radio communication systems experience significant disruptions due to post‐sunset equatorial ionospheric irregularities. …”
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Adoption of Convolutional Neural Network Algorithm Combined with Augmented Reality in Building Data Visualization and Intelligent Detection by Minghui Wei, Jingjing Tang, Haotian Tang, Rui Zhao, Xiaohui Gai, Renying Lin

“…Moreover, the model can also well realize the augmented reality navigation and interaction effect of buildings in outdoor scenes. …”
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An Observational Study on React Native (RN) Questions on Stack Overflow (SO) by Luluh Albesher, Razan Aldossari, Reem Alfayez

“…Moreover, RN-related questions revolve around six topics, with the topics of layout and navigation being the most popular and the topic of iOS issues being the most difficult. …”
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The impact of the MOOC based on the flipped classroom methodology to increase the level of information and information literacy competence in primary school teachers by Fiorela Fernández-Otoya, Jessie Bravo, Gerber Pérez-Postigo, Manuel Alfredo Alcázar-Holguin, Sandra Cecilia Loaiza Chumacero

“…After the MOOC application, it was found that the competency of navigation, search and filtering of information, data and digital content obtained the highest score, with 2.84 in the pretest and 3.67 in the posttest on a scale of 1 to 5. …”
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DomeVR: Immersive virtual reality for primates and rodents. by Katharine A Shapcott, Marvin Weigand, Mina Glukhova, Martha N Havenith, Marieke L Schölvinck

“…Immersive virtual reality (VR) environments are a powerful tool to explore cognitive processes ranging from memory and navigation to visual processing and decision making-and to do so in a naturalistic yet controlled setting. …”
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A Three-Dimensional Cooperative Guidance Law of Multimissile System by Xing Wei, Yongji Wang, Shuai Dong, Lei Liu

“…A three-dimensional guidance model is built using vector calculation and the classic proportional navigation guidance (PNG) law is extended to three dimensions. …”
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Bathymetric characteristics in the Krueng Raba Lhok Nga and Krueng Leupung, Aceh Besar Regency, Indonesia by Setiawan Ichsan, Yuni Syarifah Meurah, Maulana Febri, Muttaqin Ichlasul, Rizwan Thaib

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