On the scheme of delay-waiting direct rapid acquisition of very long PN code by WANG Hao, YI Da-jiang, WANG Fei-xue, ZHUANG Zhao-wen

“…A scheme of direct rapid acquisition of very long PN code that was used in satellite navigation system based on DSSS was presented.In the scheme,the delay of the local PN code was determined through estimate the clock bias between local satellite clock,and which is used to preset the match filter.The scheme was so called “delay-waiting” method.The deeply analysis on technique details and acquisition performance of the scheme is given.…”
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Analysis of pharmaceutical technical staff needs at hospital X in Bandung using the WISN method by Angela Alysia Elaine, Imam Adi Wicaksono

“…From the results of WISN ratio, the number of pharmaceutical technical staff available for the central pharmacy installation, emergency room pharmacy satellite, and operating room pharmacy satellite are still inadequate for the existing workload (WISN ratio < 1). …”
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Remote Characterization and Dissemination of Disper sion Compensated Ultrashort Pulses Through Dynamic Fiber Optic Links by C G Lakshmi, V R Supradeepa

“…For robust delivery, accurate characterization of the pulse dispersion at the satellite locations without specialized equipment and its compensation is essential. …”
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Charging wireless sensor network security technology based on encryption algorithms and dynamic model by Yuanming Li, Wei Guo, Xuejun Meng, Wen Xia

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Cancellation of cloud shadow effects in the absorbing aerosol index retrieval algorithm of TROPOMI by V. J. H. Trees, V. J. H. Trees, P. Wang, P. Stammes, L. G. Tilstra, D. P. Donovan, D. P. Donovan, A. P. Siebesma

“…<p>Cloud shadows can be detected in the radiance measurements of the TROPOspheric Monitoring Instrument (TROPOMI) on board the Sentinel-5P satellite due to its high spatial resolution and could possibly affect its air quality products. …”
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An urban land surface temperature and emissivity separation algorithm from ASTER TIR data and its application by Jinglun Li, Kun Li, Yonggang Qian, Xianhui Dou, Qijin Han, Jian Zeng, Hang Zhao, Qiongqiong Lan, Zhaopeng Xu, Jiayi Bai, Baoan Wei, Xining Liu, Feng Wang, Juntao Yang, Yueming Wang

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SO₂ emissions derived from TROPOMI observations over India using a flux-divergence method with variable lifetimes by Y. Chen, Y. Chen, R. J. van der A, J. Ding, H. Eskes, J. E. Williams, N. Theys, A. Tsikerdekis, P. F. Levelt, P. F. Levelt, P. F. Levelt

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Spatial Network Resource Scheduling Based on Joint MPTCP with SDN for SDN/NFV Architecture by Min JIA, Jia GUO, Meilin XU, Qing GUO, Xuemai GU

“…The space network is mainly composed of satellite networks of various architectures with many network nodes.Compared with the ground network,the nodes in the satellite network are diff cult to observe and control,and the network equipment is extremely expensive.The rapid increase in the number of users has brought a great burden to the network,and at the same time caused the network resources to be unreasonably used.The application of traditional network architecture to large-scale satellite networks results in the inability to fl exibly confi gure the network and uneven resource allocation.Aim to the above problems,a space network resource scheduling system based on SDN(software defi ned network)/NFV(network function virtualization) architecture was proposed to realized real-time monitoring of space network resources.At the same time,it combined MPTCP (multipath TCP) and SDN to completed the fl exible confi guration of the space network and the rational use of its resources.It improved the throughput of the network.…”
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MSIS‐UQ: Calibrated and Enhanced NRLMSIS 2.0 Model With Uncertainty Quantification by Richard J. Licata, Piyush M. Mehta, Daniel R. Weimer, W. Kent Tobiska, Jean Yoshii

“…We show that MSIS‐UQ debiases NRLMSIS 2.0 resulting in reduced differences between model and satellite density of 25% and is 11% closer to satellite density than the Space Force's High Accuracy Satellite Drag Model. …”
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The SIRE2 Toolkit by J. H. Adams Jr., Z. D. Robinson, J. H. Nonnast, J. H. Fisher, D. M. Hope, Z. B. Lane, R. A. Reed, J. Z. Fisher, K. M. Warren, B. D. Sierawski

“…An overview of the capabilities in the SIRE2 Toolkit is provided, and examples of applying SIRE2 to satellite orbits and arbitrary trajectories are given.…”
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Spatiotemporal Changes in Evapotranspiration and Its Influencing Factors in the Jiziwan Region of the Yellow River from 1982 to 2018 by Wenting Liu, Rong Tang, Ge Zhang, Jiacong Xue, Baolin Xue, Yuntao Wang

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Estimating ocean currents from the joint reconstruction of absolute dynamic topography and sea surface temperature through deep learning algorithms by D. Ciani, C. Fanelli, B. Buongiorno Nardelli

“…<p>Our study focuses on absolute dynamic topography (ADT) and sea surface temperature (SST) mapping from satellite observations, with the primary objective of improving the satellite-derived ADT (and derived geostrophic currents) spatial resolution. …”
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TRAINING OF ENGINEERS USING THE PROJECT-ORIENTED TEACHING by Igor V. Kovalev, Yuriy Y. Loginov, Pavel V. Zelenkov

“…The student satellite project is divided into 12 directions. The scientific work of each member of a student team belongs to one of these directions. …”
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Analysis and Experimental Study on Dynamic Behavior of Stepper-Actuated Dual-Axis Data Transmission Antenna by Zhaomingyue Zheng, Wei Cheng, Ming Li, Guangyuan Wang, Limeng Tan

“…The satellite-borne data transmission antenna is the main disturbing source of low-frequency microvibration of spacecraft, which immensely affects the image quality of remote sensing satellite. …”
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Predicting pack-ice seal occupancy of ice floes along the Western Antarctic Peninsula. by Michael J Wethington, Bilgecan Şen, Heather J Lynch

“…These patterns provide information on pack-ice seal behavior and, when combined with methods to delineate individual ice floes, can yield predictions on the number of seals likely to be found in each satellite image scene. This work represents another step in the pipeline required to automate the survey of pack-ice seals using satellite imagery, a necessary step towards pan-Antarctic monitoring of these key marine predators.…”
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Thermospheric Neutral Density Data Assimilation System Based on the Whole Atmosphere Model During the November 2003 Storm by Ching‐Chung Cheng, Timothy Fuller‐Rowell, Eric K. Sutton, Tzu‐Wei Fang, Jann‐Yenq Liu, Daniel R. Weimer

“…The first were accelerometer estimates of neutral density from the Challenging Mini‐Satellite Payload (CHAMP) satellite. The second were neutral density estimates from the Global Ultraviolet Imager (GUVI) limb‐scan airglow observations aboard the Thermosphere Ionosphere Mesosphere Energetics and Dynamics satellite. …”
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Recent Developments of Reflectarray Antennas in Dual-Reflector Configurations by Carolina Tienda, Manuel Arrebola, José A. Encinar

“…The performance and capabilities of these antennas are shown by describing some practical design cases for radar, satellite communications, and direct broadcast satellite (DBS) applications.…”
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Increased vulnerability of Arctic potential ice roads under climate change by Yuanbiao Dong, Pengfeng Xiao, Xueliang Zhang, Daqing Ge, Junchuan Yu, Yangyang Chen, Qiong Wu, Yanni Ma, Rongyuan Liu, Wenbo Luan, Hao Liu, Jie Bai

“…Here, we construct a potential ice road assessment model that allows quantization of the climatic suitability of potential ice roads in the Arctic. Using satellite remote sensing and meteorological data, we find changes in surface air temperature and snow cover reduced the climatic suitability of potential ice roads during 1979–2017. …”
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Trend Analysis of Lake Surface Temperatures in Lake Van by Kebir Emre Saraçoğlu, Fevziye Ayça Saraçoğlu

“…For the period of 2016- 2020; NASA-Day, NASA-Night satellite and measurement data obtained from the Turkish State Meteorological Service for 3 stations were compared. …”
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Multi-User Detection Algorithm for Asynchronous Non-Orthogonal Multiple Access Based on Gaussian Approximation by Peisen WANG, Yueneng WANG, Boming CHENG, Yue YANG, Neng YE

“…Code domain non-orthogonal multiple access (NOMA) is one of the potential technologies to realize ubiquitous access in the future satellite internet.Considering that satellite-to-ground transmission has the characteristics of large propagation delay and high channel dynamics, strict timing synchronization between ground devices will lead to unbearable time resource overhead.Loosed synchronization relationship are required to achieve multi-user access in satellite internet.However, most of the existing multi-user detection algorithms in code domain NOMA are based on the assumption of synchronous transmission, which cannot accurately model and eff ectively alleviate the complex interference introduced by asynchronous multi-user transmission.Therefore, a novel multi-layer factor graph model by introduced the relative delay among users into the traditional two-part factor graph was constructed, and a low-complexity asynchronous multi-user detection algorithm based on gaussian approximation was proposed.The proposed algorithm iterated between each user's estimates and propagated the estimated information between users to improved the approximation.Simulation results showed that in high SNR region, the performance of the asynchronous code-domain NOMA with the proposed algorithm even outperforms its synchronous counterpart.…”
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