The improvement of the instrumental means for processing and analyzing of space information by S. A. Zolotoy, I. B. Strashko, D. S. Kotau, I. M. Nestsiarovich, V. V. Rouba, K. I. Kostyuk

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Maximum Mixture Correntropy Criterion-Based Variational Bayesian Adaptive Kalman Filter for INS/UWB/GNSS-RTK Integrated Positioning by Sen Wang, Peipei Dai, Tianhe Xu, Wenfeng Nie, Yangzi Cong, Jianping Xing, Fan Gao

Subjects: “…inertial navigation system (INS)/ultra-wideband (UWB)/global navigation satellite system real-time kinematic (GNSS-RTK)…”
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Application of IR Fourier microscopy for investigation of kimberlite indicator minerals to search for diamond deposits using heavy-mineral concentrate method by Khachatryan G. K., Anashkina N. E.

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International Legal Regulation of Military Outer Space Activities by A. I. Antonov

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Visual-inertial navigation assisted by a single UWB anchor with an unknown position by Haolong Luo, Danping Zou, Jiansheng Li, Ancheng Wang, Li Wang, Zidi Yang, Guangyun Li

“…Satellite Navigation…”
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Blending 2D topography images from the Surface Water and Ocean Topography (SWOT) mission into the altimeter constellation with the Level-3 multi-mission Data Unification and Altime... by G. Dibarboure, C. Anadon, F. Briol, E. Cadier, R. Chevrier, A. Delepoulle, Y. Faugère, A. Laloue, R. Morrow, N. Picot, P. Prandi, M.-I. Pujol, M. Raynal, A. Tréboutte, C. Ubelmann

“…In contrast, some research domains and applications require consistent multi-mission observations, such as the Level-3 ocean products provided by the Data Unification and Altimeter Combination System (DUACS) for almost 3 decades and with 20 different satellites. In this paper, we describe how we extended the Level-3 algorithms to handle SWOT's unique swath-altimeter data. …”
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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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Spatial and Temporal Variability of Aerosol Vertical Distribution Based on Lidar Observations: A Haze Case Study over Jinhua Basin by Wanchun Zhang, Mortier Augustin, Ying Zhang, Zhengqiang Li, Hua Xu, Dong Liu, Zhenzhu Wang, Yuhuan Zhang, Yan Ma, Fengxia Zhang, Yang Lv

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Integrating wide-swath altimetry data into Level-4 multi-mission maps by M. Ballarotta, C. Ubelmann, V. Bellemin-Laponnaz, F. Le Guillou, G. Meda, C. Anadon, A. Laloue, A. Delepoulle, Y. Faugère, M.-I. Pujol, R. Fablet, G. Dibarboure

“…Historically, these observations have mainly relied on satellite nadir altimetry data, which were limited to observation scales greater than approximately 60 km. …”
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Intelligent Load Balancing Algorithm of Mega Constellation by Shuxin LUO, Chao ZHANG, Yong XIAO, Jianping LIU

“…To overcome the local traffic congestion caused by the huge number of satellites in mega-constellation, a load balancing algorithm based on multi-agent deep reinforcement learning was proposed.Firstly, the satellites in the mega constellation were divided into clusters to perform the distributed management of the mega constellation, which could reduce the overhead of whole network.Then, based on the coordinated multi-agent deep reinforcement learning model, routing planning, which could be individually operated by satellites in the mega constellation, was designed to achieve the intra-cluster coordination.Additionally, a cluster state compression mechanism with autoencoder was proposed to compress the state space and improve the efficiency of multi-agent deep reinforcement learning.Finally, simulation results showed that compared with the traditional single-task routing algorithm, the proposed algorithm could increase the transmission success rate by more than 40% and the proposed algorithm could efficiently avoid local traffic congestion.…”
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Estimation of Daily Sunshine Duration from Terra and Aqua MODIS Data by H. M. Kandirmaz, K. Kaba

“…Some studies have shown that the estimation of global sunshine duration can be done with the help of geostationary satellites because they can record several images of the same location in a day. …”
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Research on Stateless Address Auto-Confi guration and Duplicate Address Detection in Space-Integrated-Ground Information Network by Yazheng CHEN, Hewu LI

“…LEO (Low Earth Orbit) satellites with high mobility in space-integrated-ground information network cause ground user terminals change connected satellites continuously, so user terminals can't keep stable IPv6 addresses.SLAAC (Stateless Address Auto-Confi guration) in space-integrated-ground information network to provide stable IPv6 addresses was investigated, and an eff ective SLAAC and DAD (Duplicate Address Detection) mechanism was proposed.Aiming at the scenario where the ground equipment in the LEO satellite constellation constantly switches the LEO satellites, an IPv6 stateless address automatic confi guration and duplicate address detection mechanism was proposed.The scope of duplicate address detection was reduced by introducing ground position information and satellite orbit information, thereby eff ectively reduced signaling overhead for duplicate address detection.…”
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Comparison of Empirical and Theoretical Models of the Thermospheric Density Enhancement During the 3–4 February 2022 Geomagnetic Storm by Jianhui He, Elvira Astafyeva, Xinan Yue, Nicholas M. Pedatella, Dong Lin, Timothy J. Fuller‐Rowell, Mariangel Fedrizzi, Mihail Codrescu, Eelco Doornbos, Christian Siemes, Sean Bruinsma, Frederic Pitout, Adam Kubaryk

“…The satellites were meant to be further raised to 550 km. …”
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Improvement of Carrier Phase Tracking Based on a Joint Vector Architecture by Shaohua Chen, Yang Gao

“…Since the joint vector based tracking loops jointly process the signals of all available satellites, the potential interchannel influence between different satellites is also investigated.…”
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A Framework to Estimate Local Atmospheric Densities With Reduced Drag‐Coefficient Biases by Vishal Ray, Daniel J. Scheeres, Suood Alnaqbi, W. Kent Tobiska, Siamak G. Hesar

“…But densities estimated using satellite tracking data are always uncertain up to the drag‐coefficient assumed in the inversion method. …”
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Connection Planning Method Between LEO Communication Constellation and Earth Station by Shuge ZHAO, Xiaoyu LI, Qi LIU, Aijing WU, Jing WEI

“…A connection planning method between LEO communication constellation and earth station was proposed.Considering the large number of LEO communication constellation satellites, it is diffi cult to directly establish the connection planning method between LEO communication constellation and multiple earth stations.The connection planning method between single satellite and single earth station, the connection planning method between satellite constellation and single earth station, the connection planning method between satellite constellation and multiple earth stations were established.The former planning method is the basis of the latter planning method, which is the expansion of the former planning method, and fi nally forms a connection planning method between LEO communication constellation and multiple earth stations.A typical simulation example showed that in the process of connecting between the earth station and the satellite constellation, the elevation from the earth station to the satellite was not lower than the lower limit of the communication elevation.In the single connecting section between the earth station and the satellite, the variation trend of off -axis angle decreases fi rst and then increases.The connected satellites selected by the earth station showed the orbital plane switching and the sequential switching of satellites in an orbital plane, which indirectly verifi ed the correctness of the connection planning strategy.…”
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SpaceX—Sailing Close to the Space Weather? by Mike Hapgood, Huixin Liu, Noé Lugaz

“…Abstract The 3 February 2022 launch of 49 of SpaceX's Starlink satellites has provided a fascinating example of how even modest space weather can have significant practical and financial consequences. …”
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Relative Navigation in LEO by Carrier-Phase Differential GPS with Intersatellite Ranging Augmentation by Alfredo Renga, Michele Grassi, Urbano Tancredi

“…Carrier-phase differential GPS (CDGPS) is a promising technology for accurate relative navigation in LEO formations of cooperating satellites, but navigation filter robustness against poor GPS geometry and noisy measurements has to be improved. …”
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Two‐Dimensional Reconstruction of Ionospheric Plasma Density Variations Using Swarm by A. Fæhn Follestad, L. B. N. Clausen, W. J. Miloch, J. van denIJssel, R. Haagmans

“…Abstract Space weather phenomena such as scintillations of Global Navigation Satellite Systems (GNSS) signals are of increasing importance for aviation, the maritime, and civil engineering industries. …”
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ALGUNAS APLICACIONES RECIENTES DE LA TÉCNICA DE RADIO OCULTAMIENTO SATELITAL EN EL ESTUDIO DE PROCESOS ATMOSFÉRICOS by Alejandro de la Torre, Pedro Alexander, Pablo Llamedo, Rodrigo Hierro, Horacio Pessano, Andrés Odiard

“…In the last years, the use of radio occultation (RO) technique to observe the terrestrial atmosphere and the climate takes advantage of the occultation of the Sun, the Moon, the stars and principally of artificial satellites of low height (LEO). In the latter case, crossed signs between LEO and GPS satellites are used. …”
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