Adequacy of in-mission training to treat tibial shaft fractures in mars analogue testing by Julie Manon, Michael Saint-Guillain, Vladimir Pletser, Daniel Miller Buckland, Laurence Vico, William Dobney, Sarah Baatout, Cyril Wain, Jean Jacobs, Audrey Comein, Sirga Drouet, Julien Meert, Ignacio Sanchez Casla, Cheyenne Chamart, Jean Vanderdonckt, Olivier Cartiaux, Olivier Cornu

“…Abstract Long bone fractures are a concern in long-duration exploration missions (LDEM) where crew autonomy will exceed the current Low Earth Orbit paradigm. Current crew selection assumptions require extensive complete training and competency testing prior to flight for off-nominal situations. …”
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An Improved Range-Searching Initial Orbit-Determination Method and Correlation of Optical Observations for Space Debris by Xiangxu Lei, Shengfu Xia, Hongkang Liu, Xiaozhen Wang, Zhenwei Li, Baomin Han, Jizhang Sang, You Zhao, Hao Luo

“…The Changchun Observatory of the National Astronomical Observatories, Chinese Academy of Sciences, and the Shanghai Astronomical Observatory are used to generate very short arc (VSA) angle observations of objects in low Earth orbit (LEO) and geostationary orbit (GEO) with their ground-based electrical–optical telescope arrays (EA), the Changchun EA and SAO FocusGEO, respectively. …”
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Integrated Navigation and Communication Service for LEO Satellites Based on BDS-3 Global Short Message Communication by Shuren Guo, Gang Li, Jiaju Zheng, Qianyi Ren, Yifan Wu, Guanhao Shen, Hengyi Yue

“…Massive global Low Earth Orbit (LEO) constellations have been developed rapidly with the characteristics of larger number and shorter orbital periods of LEO satellites in recent years. …”
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Optical Tracking Data Validation and Orbit Estimation for Sparse Observations of Satellites by the OWL-Net by Jin Choi, Jung Hyun Jo, Hong-Suh Yim, Eun-Jung Choi, Sungki Cho, Jang-Hyun Park

“…An Optical Wide-field patroL-Network (OWL-Net) has been developed for maintaining Korean low Earth orbit (LEO) satellites’ orbital ephemeris. …”
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Validation of CrIS Radiometric Performance through Its Comparison to ABI by Zhipeng Wang, Flavio Iturbide-Sanchez, Peter Beierle, Kun Zhang, Denis Tremblay

“…In this paper, the radiance products of the Cross-track Infrared Sounder (CrIS), an interferometer-based hyperspectral IR sounder in low Earth orbit (LEO), is compared with the level-1b (L1b) radiance products of the infrared (IR) bands of the Advanced Baseline Imager (ABI), an imaging radiometer in geostationary (GEO) orbit. …”
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Galileo Ionospheric Correction Algorithm Integration into the Open-Source GNSS Laboratory Tool Suite (gLAB) by Angela Aragon-Angel, Adria Rovira-Garcia, Enrique Arcediano-Garrido, Deimos Ibáñez-Segura

“…We confirmed the discrepancy by processing radio-occultation actual measurements from a COSMIC-2 low Earth orbit satellite. We selected the JRC version of the Galileo ICA to be integrated into the GNSS LABoratory (gLAB) tool suite, because its open license and its processing speed (it is 13.88% faster than the ESA version). …”
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A 17.8–20.2 GHz Compact Vector-Sum Phase Shifter in 130 nm SiGe BiCMOS Technology for LEO Gateways Receivers by Javier del Pino, Sunil L. Khemchandani, Mario San-Miguel-Montesdeoca, Sergio Mateos-Angulo, Daniel Mayor-Duarte, Jose Luis Saiz-Perez, David Galante-Sempere

“…The design is suitable for use in receive phased arrays for the gateways of major low Earth orbit (LEO) constellations that operate in the 17.8 to 20.2 GHz frequency range. …”
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Effective Size Reduction of the Metallic Waveguide Bandpass Filter with Metamaterial Resonators and Its 3D-Printed Version by Junghyun Cho, Yejune Seo, Jihaeng Cho, Kyoung Youl Park, Joongki Park, Hosub Lee, Sungtek Kahng

“…The proposed metamaterial filter is realized as a 3D-printed structure to be lighter and thus more suitable for low earth orbit (LEO) satellites. An X-band of 7.25–7.75 GHz is chosen to verify the method as the passband with an attenuation of 40 dB at 7.00 GHz and 8.00 GHz as the roll-off in the stopband. …”
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An Effective Sensor Architecture for Full-Attitude Determination in the HERMES Nano-Satellites by Andrea Colagrossi, Michèle Lavagna, Roberto Bertacin

“…The space segment is composed of a constellation of CubeSats in low-Earth orbit (LEO), ensuring an accurate transient localization in a field of view of several steradians exploiting the triangulation technique. …”
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Efficient Wideband Spectrum Sensing with Maximal Spectral Efficiency for LEO Mobile Satellite Systems by Feilong Li, Zhiqiang Li, Guangxia Li, Feihong Dong, Wei Zhang

“…In this paper, we mainly investigate the problem of joint designing sensing time and hard fusion scheme to maximize SU spectral efficiency in the scenario of low earth orbit (LEO) mobile satellite services based on wideband spectrum sensing. …”
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Pass-by-Pass Ambiguity Resolution in Single GPS Receiver PPP Using Observations for Two Sequential Days: An Exploratory Study by Ruijie Xi, Qusen Chen, Xiaolin Meng, Panos Psimoulis, Weiping Jiang, Caijun Xu

“…“Pass-by-pass” or “track-to-track” ambiguity resolution removes Global Navigation Satellite System (GNSS) satellite hardware delays between adjacent undifferenced (UD) ambiguities, which is often applied in precise orbit determination (POD) for Low Earth Orbit (LEO) satellites to improve the accuracy of orbits. …”
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Uncertainty quantification techniques for data-driven space weather modeling: thermospheric density application by Richard J. Licata, Piyush M. Mehta

“…Our inability to forecast it has severe repercussions in the context of satellite drag and computation of probability of collision between two space objects in low Earth orbit (LEO) for decision making in space operations. …”
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Rendezvous and Proximity Operations in Cislunar Space Using Linearized Dynamics for Estimation by David Zuehlke, Madhur Tiwari, Khalid Jebari, Krishna Bhavithavya Kidambi

“…Contrary to satellites in Low Earth Orbit (LEO), where it takes around 5 ms to communicate back and forth with a ground station, it can take up to 2.4 s to communicate with satellites near the Moon. …”
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Gradient calculation techniques for multi-point ionosphere/thermosphere measurements from GDC by Hassanali Akbari, Hassanali Akbari, Douglas Rowland, Austin Coleman, Anton Buynovskiy, Jeffrey Thayer, Jeffrey Thayer

“…The previous work by De Keyser, originally developed for analysis of Cluster data, focused on 3-D Cartesian geometry, while the current work extends the approach to spherical geometry suitable for missions in Low Earth Orbit (LEO). The algorithm automatically provides error bars for the estimated gradients as well as the scales over which the gradients are expected to be constant. …”
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An In-Orbit Measurement Method for Elevation Antenna Pattern of MEO Synthetic Aperture Radar Based on Nano Calibration Satellite by Tian Qiu, Yu Wang, Jun Hong, Kaichu Xing, Shaoyan Du, Jingwen Mu

“…The medium-Earth-orbit synthetic aperture radar (MEO-SAR) is deployed at orbit altitude above low-Earth-orbit synthetic aperture radar (LEO-SAR, around 2000 km) and below the geosynchronous orbit SAR (GEO-SAR, near 35786 km) to cover a wide swath, which is four to five times larger than LEO-SAR. …”
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An FPGA-Based Hardware Accelerator for CNNs Inference on Board Satellites: Benchmarking with Myriad 2-Based Solution for the CloudScout Case Study by Emilio Rapuano, Gabriele Meoni, Tommaso Pacini, Gianmarco Dinelli, Gianluca Furano, Gianluca Giuffrida, Luca Fanucci

“…Nevertheless, this solution introduces multiple drawbacks due to its design not specifically being for the space environment, thus limiting its applicability to short-lifetime Low Earth Orbit (LEO) applications. The current work provides a benchmark between the Myriad 2 and our custom hardware accelerator designed for Field Programmable Gate Arrays (FPGAs). …”
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An aperture of 21 cm telescope with polarized coaxial for satellite laser ranging by Mingliang Long, Huarong Deng, Haifeng Zhang, Haifeng Zhang, Kai Tan, Hai sheng Lin, Zhibo Wu, Zhibo Wu, Zhongping Zhang, Zhongping Zhang, Zhongping Zhang

“…Also, a 4f system was applied to shrink the laser echo beam and filter out noise, the measurements of low-Earth orbit and long-distance high-orbit satellites were realized, and the ranging accuracy was ∼2 cm. …”
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On the Frequency Carrier Offset and Symbol Timing Estimation for CCSDS 131.2-B-1 High Data-Rate Telemetry Receivers by Matteo Bertolucci, Riccardo Cassettari, Luca Fanucci

“…The timing error detectors (TED) and frequency error detectors (FED) were therefore studied on the specific peculiarities of CCSDS 131.2-B-1 in its usual environment of Low Earth Orbit (LEO). Estimators have been evaluated highlighting performances, trade-offs and peculiarities of each one with respect to corresponding architectural choices. …”
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The European Low Frequency Survey by Mennella A., Arnold K., Azzoni S., Baccigalupi C., Banday A., Barreiro R.B., Barron D., Bersanelli M., Casey S., Colombo L., de la Hoz E., Franceschet C., Jones M.E., Genova-Santos R.T., Hoyland R.J., Lee A.T., Martinez-Gonzalez E., Montonati F., Rubiño-Martin J.A., Taylor A., Vielva P.

“…The receiver will be equipped with a fully digital backend based on the latest Xilinx RF System-on-Chip devices that will provide frequency resolution of 1MHz across the whole observing band, allowing us to clean the scientific signal from unwanted radio frequency interference, particularly from low-Earth orbit satellite mega-constellations. This paper reviews the scientific motivation for ELFS and its instrumental characteristics, and provides an update on the development of ELFS on SA.…”
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Simulation of CSST’s astrometric capability by Zhen-Sen Fu, Zhen-Sen Fu, Zhao-Xiang Qi, Zhao-Xiang Qi, Shi-Long Liao, Shi-Long Liao, Xi-Yan Peng, Yong Yu, Yong Yu, Qi-Qi Wu, Qi-Qi Wu, Li Shao, You-Hua Xu

“…Introduction: The China Space Station Telescope (CSST) will enter a low Earth orbit around 2024 and operate for 10 years, with seven of those years devoted to surveying the area of the median-to-high Galactic latitude and median-to-high Ecliptic latitude of the sky. …”
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