The Sanya Incoherent Scatter Radar Tristatic System and Initial Experiments by Xinan Yue, Baiqi Ning, Lin Jin, Feng Ding, Changhai Ke, Junyi Wang, Ning Zhang, Yihui Cai, Mingyuan Li, Junhao Luo, Weiping Chen, Yunxia Zhang, Biqiang Zhao, Lingqi Zeng, Yonghui Wang

“…Three stations form a quasi‐equilateral triangle at Hainan Island and use Global Navigation Satellite System satellite common view technique to achieve the time synchronization with the uncertainty of the timing and time synchronization less than 50 and 10 ns, respectively. …”
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Coupling ICESat-2 and Sentinel-2 data for inversion of mangrove tidal flat to predict future distribution pattern of mangroves by Xiaoyong Ming, Yichao Tian, Qiang Zhang, Yali Zhang, Jin Tao, Junliang Lin

“…Therefore, we aim to rely entirely on Earth observation satellite platforms, combining satellite-based Light Detection and Ranging (LiDAR) and optical remote sensing to monitor extensive mangrove tidal flat topography. …”
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Heterogeneous long-term changes in larch forest and shrubland cover in the Kolyma lowland are not captured by coarser-scale greening trends by Heather Kropp, Michael M Loranty, Howard Epstein, Gerald V Frost, Adam Koplik, Logan T Berner

“…Changes in shrub and tree cover can be difficult to characterize with limited in-situ observations and moderate/coarse resolution satellite imagery, thereby posing challenges in disentangling changes in vegetation growth from shifts in vegetation composition. …”
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Development status and challenges of LEO IoT by Geng-xin ZHANG, Xiao JIE, Zhi-cheng QU

“…According to the requirements of interconnection of all things,background of development of establishing IoT using the LEO satellite communication network is researched.The development status of LEO IoT at home and abroad is analyzed,and the technical challenges and research content of LEO IoT are discussed.…”
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Mixture density networks for re-constructing historical ocean-color products over inland and coastal waters: demonstration and validation by Sundarabalan V. Balasubramanian, Ryan E. O’Shea, Ryan E. O’Shea, Arun M. Saranathan, Arun M. Saranathan, Christopher C. Begeman, Christopher C. Begeman, Daniela Gurlin, Caren Binding, Claudia Giardino, Michelle C. Tomlinson, Krista Alikas, Kersti Kangro, Moritz K. Lehmann, Moritz K. Lehmann, Lisa Reed

“…Our model is validated on satellite match-ups corresponding to the SeaWiFS Bio-optical Archive and Storage System (SeaBASS) database. …”
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Opposing trends in the peak and low ozone concentrations in eastern China: anthropogenic and meteorological influences by Z. Wang, Z. Wang, C. Shi, C. Shi, H. Zhang, H. Zhang, X. Ji, Y. Zhu, C. Xia, X. Sun, X. Sun, X. Lin, S. Yan, S. Wang, Y. Zhou, Y. Zhou, C. Xing, Y. Chen, Y. Chen, C. Liu, C. Liu, C. Liu, C. Liu

“…Long-term observations of ozone precursors were conducted to explore the factors influencing ozone trends in this region. Combined with satellite and surface measurements, we evaluated the trends in low (2nd percentile), typical (50th percentile), and peak (98th percentile) ozone concentrations in detail. …”
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Numerical Modeling and GNSS Observations of Ionospheric Depletions Due To a Small‐Lift Launch Vehicle by G. W. Bowden, M. Brown

“…Abstract Space launches produce ionospheric disturbances which can be observed through measurements such as Global Navigation Satellite System signal delays. Here we report observations and numerical simulations of the ionospheric depletion due to a Small‐Lift Launch Vehicle. …”
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An Assessment of Land Use Land Cover Using Machine Learning Technique by V. Pushpalatha, H. N. Mahendra, A. M. Prasad, N. Sharmila, D. Mahesh Kumar, N. M. Basavaraju, G. S. Pavithra and S. Mallikarjunaswamy

“…The methodology involves the acquisition and preprocessing of multi-temporal satellite imagery to delineate and map the built-up areas at different time intervals. …”
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Characterization of Vegetation Changes in Jiangsu Coastal Wetlands and Analysis of Their Causes by LYU Lin, YU Lingcheng, QIAN Linfeng, CHEN Yanyan, ZHANG Ke, GU Rong, ZHANG Dong

“…The results show that the classification accuracy based on Sentinel-2 satellite images is high. The vegetation community of Jiangsu coastal wetland is mainly distributed between Xinyang Port and Doulong Port, with a few coastal embankments distributed in strips. …”
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Russian forests show strong potential for young forest growth by Christopher S. R. Neigh, Paul M. Montesano, Joseph O. Sexton, Margaret Wooten, William Wagner, Min Feng, Nuno Carvalhais, Leonardo Calle, Mark L. Carroll

“…Russia, which comprised 73% of the forest change domain, had strong departures from model expectation of 2.4–4.8 ± 3.8 m for the 75th and 90th percentiles. Combining satellite observations revealed a large young forest growth sink if allowed to recover from disturbance.…”
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On-Orbit Thermal Design and Validation of 1 U Standardized CubeSat of STEP Cube Lab by Soo-Jin Kang, Hyun-Ung Oh

“…The Cube Laboratory for Space Technology Experimental Projects (STEP Cube Lab) is a cube satellite (CubeSat) classified as a pico-class satellite of 1 U (unit) size. …”
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Edge computing for detection of ship and ship port from remote sensing images using YOLO by Vasavi Sanikommu, Sai Pravallika Marripudi, Harini Reddy Yekkanti, Revanth Divi, R. Chandrakanth, P. Mahindra

“…In marine security and surveillance, accurately identifying ships and ship ports from satellite imagery remains a critical challenge due to the inefficiencies and inaccuracies of conventional approaches. …”
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Development of a Passive Vibration Damping Structure for Large Solar Arrays Using a Superelastic Shape Memory Alloy with Multi-Layered Viscous Lamination by Gi-Seong Woo, Jae-Hyeon Park, Sung-Woo Park, Hyun-Ung Oh

“…In the space environment, the elastic vibrations of satellite solar panels are caused by various factors that disturb satellite missions. …”
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An Evapotranspiration Assimilation Method Based on Ensemble Kalman Filter and À Trous Wavelet by Shaohui Chen, Jianwei Qi, Xiaomin Sun, Xiangzheng Deng, Jing Tian

“…These indicate that the proposed method is promising for assimilating regional scale satellite retrieved EP into LSMs.…”
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An Intercomparison of GPS RO Retrievals with Colocated Analysis and In Situ Observations within Tropical Cyclones by Henry R. Winterbottom, Qingnong Xiao

“…Observations from four Global Position System (GPS) Radio Occultation (RO) missions: Global Positioning System/Meteorology, CHAallenging Minisatellite Payload, Satellite de Aplicaciones Cientificas-C, and Constellation Observing System for Meteorology, Ionosphere and Climate and Taiwan's FORMOsa SATellite Mission #3 (COSMIC/FORMOSAT-3) are collected within a 600 km radius and ±180 minute temporal window of all observed tropical cyclones (TCs) from 1995 to 2006 that were recorded in the global hurricane best-track reanalysis data set (Jarvinen et al. (1984); Davis et al. (1984)). …”
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Research on the Power Flux-Density at the Earth’s Surface Produced by Emissions from the Fixed Beam of NGSO Constellation System by Ying HUANG, Chen JIAN, Wei LI, Kang YAN

“…The power fl ux-density is an interference criterion for protecting terrestrial service systems from non-geostationary orbit (NGSO) constellation systems.Based on the defi nition of power fl ux density(PFD), a calculation method on the PFD produced by the emissions from the fi xed beam of NGSO constellation system was given.On the basis of describing the PFD constraint conditions of the NGSO fi xed-satellite service system given by ITU, a method for determining the limits of PFD from the NGSO constellation system was presented.Taking the Starlink system as the typical scenario, the PFD produced by telemetry, tracking, and control (TT＆amp;C) beam of the Starlink system was analyzed.The results showed that the analytical results of the given method were consistent with those of the Starlink system, and the PFD of TT＆amp;C beam in the 18.55-18.6 GHz frequency band exceeded the limit given in radio regulations.Under the current ITU framework, the number of the satellite constellation is a decisive factor for the legal use of the Ka band by NGSO constellation system.…”
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Frequency Diverse Array Target Localization Based on IPSO-BP by Qinghua Liu, Kai Ding, Bingsen Wu, Quanmin Xie

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Beam Hopping Beam Optimization and Resource Allocation Algorithm Based on Phased Array by Mengting HAO, Chen ZHANG, Gengxin ZHANG

“…Beam hopping technology can provide enough fl exibility and high resource utilization for satellite communication system, and shows good performance in broadband satellite communication system.However, the existing beam planning scheme of beam hopping technology is relatively fi xed and can not change with the change of service demand characteristics.For the situation of uneven distribution of user demand and scattered location, the advantages of beam hopping technology are diffi cult to play.To solve the above problems, a beam optimization method was proposed, which used the agility characteristics of phased array antenna to adjusted the size of beam according to the characteristics of service distribution, so as to made the service demand in each beam more balanced.On this basis, from the perspective of matching the demand with the actual transmission capacity, the minimization n-order diff erence objective function was established, the time slot resources allocated in each beam were solved by convex optimization algorithm, and the overall satisfaction and system delay of the system before and after beam optimization were compared.The simulation results showed that compared with the traditional beam planning scheme, the algorithm could improved the overall satisfaction of the system, reduced the system delay and improved the access success rate of the users.…”
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Research on Spaceborne Multi-Beam Phased Array Fed Refl ector Antenna by Tao YANG, Lei LI, Yongqing ZOU

“…Spaceborne multi-beam antenna is one of the main means to meet the needs of high-capacity and high-speed satellite communication services, and is widely used in various satellite communication systems.Various forms of antennas, such as spaceborne phased array multi-beam antenna, lens multi-beam antenna, conventional refl ector multi-beam antenna and phased array fed reflector multi-beam antenna were introduced.Here, a novel phased array fed reflector multi-beam antenna was demonstrated, the corresponding design method was given, and the prototype was developed and verifi ed.The proposed antenna has the characteristics of transmitting and receiving common aperture, small array size, low cost, scalable beam quantity, fast agility, high dynamic deployment effi ciency as well as good platform adaptability.Compared with the two-dimensional phased array antenna system, the antenna could achieved more beams.Compared with the multi-beam refl ector antenna, it could also realized the agility scanning of all beams and the centralized call ability of 93%~97%.…”
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Exemplification in academic discourse structure by Ewa Kucelman

“…We focus on how exemplification, viewed as the satellite, contributes to the better recognition of the subject matter, which is understood as the nucleus. …”
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