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A high-order disturbance nutation/wobble control for unbalanced spinning satellites Adv. Space Res. (IF 2.6) Pub Date : 2024-04-16 Hamed Shahmohamadi Ousaloo, B. Akbarinia
This paper introduces a novel active nutation/wobble rejection control method for spinning satellites enduring thrusting disturbances and reaction wheel limitations. Our approach employs two tilted reaction wheels in reaction-momentum mode, actively controlling wobble/nutation while enhancing disturbance rejection for dynamically unbalanced satellites. This eliminates the need for balancing processes
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Anti-unwinding adaptive robust backstepping attitude maneuver control for rigid spacecraft Adv. Space Res. (IF 2.6) Pub Date : 2024-04-16 Huijuan Zhang, Jinxiang Zhang, Miaoxin Ji, Hu Liu, Yuanjin Yu
In this paper, an anti-unwinding adaptive robust Backstepping control law is proposed to solve the attitude control problem of rigid spacecraft with external disturbances and inertia uncertainties. A new variable based on hyperbolic sine functions is designed to prevent the unwinding phenomenon, and then a novel robust backstepping controller is developed. Initially, a nonlinear tracking law is designed
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Comparison of diverse machine learning algorithms for forest fire susceptibility mapping in Antalya, Türkiye Adv. Space Res. (IF 2.6) Pub Date : 2024-04-16 Hazan Alkan Akinci, Halil Akinci, Mustafa Zeybek
Antalya is one of the provinces with the highest number of forest fires in Türkiye. In 2021, 278 forest fires occurred within the administrative boundaries of Antalya Regional Directorate of Forestry. The main objective of this study is to produce forest fire susceptibility (FFS) maps of Antalya province using machine learning (ML) models. In addition to forest fire inventory data, 16 factors, including
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Hyperspectral target detection using self-supervised background learning Adv. Space Res. (IF 2.6) Pub Date : 2024-04-16 Muhammad Khizer Ali, Benish Amin, Abdur Rahman Maud, Farrukh Aziz Bhatti, Komal Nain Sukhia, Khurram Khurshid
Hyperspectral target detection is challenging in scenarios where spectral variability is high due to noise, spectral redundancy, and mixing. In addition, this spectral variability also creates the need for target detection algorithms to be robust against variations in the detection threshold. To overcome these challenges, this paper proposes a novel two-stage process for improved target detection in
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Cosmic rays of extreme energies above [formula omitted]100 EeV Adv. Space Res. (IF 2.6) Pub Date : 2024-04-16 Stanislav Knurenko, Igor Petrov
The article considers air showers produced by primary particles with energies 100 EeV. For verification of their characteristics, analysis of air showers with energies 1 EeV are used. The air showers were registered in the course of continuous long-term observations at the Yakutsk array of extensive air showers. In the present work, the mathematical processing of showers was repeated and the phenomenology
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Fuel-optimal satellite formation reconfiguration method with best passive safety parameters Adv. Space Res. (IF 2.6) Pub Date : 2024-04-15 Qiaoling Zeng, Xiaoyu Zhu, Jihe Wang
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Impact of incorporating Spire CubeSat GPS observations in a global GPS network solution Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Cyril Kobel, Maciej Kalarus, Daniel Arnold, Adrian Jäggi
Commonly, Global Positioning System (GPS)-based precise orbit determination (POD) of a low Earth orbiting (LEO) satellite is conducted by introducing fixed GPS orbits and clock corrections that were derived in a previous independent network solution using ground-based GPS receivers only. There have been a number of studies showing that the integration of LEO GPS observations can be advantageous in
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Low frequency dust acoustic drift instability in the equatorial electrojet Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Sanjib Sarkar, Jyoti K. Atul, Modhuchandra Laishram, Anirban Saha, Prabal K. Chattopadhyay
The dust acoustic drift instability has been investigated at the lower electrojet region of the dusty ionosphere by considering a linearized fluid model. The effect of dust-neutral collisions, electron–ion recombination at the surface of the dust particles, and electron and ion inertia on the onset and growth of the instability have been explored in minutiae. The perturbed densities are gleaned from
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Sample data selection based on the feature subspace for photometric correction of the Chang'E-4 in situ observations Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Jia Li, Chao Wang, Huan Xie, Xiaohua Tong, Yongjiu Feng, Xiong Xu, Sicong Liu
The lunar surface exhibits noticeable variations in photometric properties across different regions, influenced by their specific compositional and physical characteristics. These variations are particularly pronounced at the millimeter to centimeter scale. In this study, we propose a feature subspace-based sample selection method to identify Chang'E-4 Visible Near-infrared Imaging Spectrometer (CE-4
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Pillars of space traffic management in the era of LEO mega-constellations: A global perspective Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Jie Long, Tao Zhang
In the context of deepening civil-military integration of the space industry and escalating competition among major powers, the rapid development of LEO mega-constellations has led to significant changes concerning space safety and security governance. Increasingly crowded outer space, aggravated by the emergence of mega-constellations, has posed severe challenges to space operational safety and national
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FarView: An in-situ manufactured lunar far side radio array concept for 21-cm Dark Ages cosmology Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Ronald S. Polidan, Jack O. Burns, Alex Ignatiev, Alex Hegedus, Jonathan Pober, Nivedita Mahesh, Tzu-Ching Chang, Gregg Hallinan, Yuhong Ning, Judd Bowman
is an early-stage concept for a large, low-frequency radio observatory, manufactured in-situ on the lunar far side using metals extracted from the lunar regolith. It consists of 100,000 dipole antennas in compact subarrays distributed over a large area but with empty space between subarrays in a core-halo structure. covers a total area of ∼200 km, has a dense core within the inner 36 km, and a ∼power-law
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Validation of Sentinel-6MF based lake levels – An assessment with in situ data and other satellite altimetry data Adv. Space Res. (IF 2.6) Pub Date : 2024-04-10 Bjarke Nilsson, Karina Nielsen
The importance of satellite altimetry for monitoring inland water bodies is increasing, with the increasing need for fresh water. With the addition of the Sentinel-6 Michael Freilich (MF) in 2020 to the satellite altimetry record, we have parallel high- and low-resolution inland water observations. In this study, we validate Sentinel-6MF low- and high-resolution lake water levels, as determined with
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Modelling of spacecraft apparent brightness A study on OneWeb constellation satellites Adv. Space Res. (IF 2.6) Pub Date : 2024-04-09 Gerardo Littoriano, Camilla Colombo, Alessandro Nastasi, Carmelo Falco
Artificial satellites orbiting around the Earth, under certain conditions, result to be visible even to the naked eye. The phenomenon of light pollution jeopardises the researching activities of the astronomical community: traces left by the objects are clear and evident and images for scientific purposes are damaged and deteriorated.
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Review of energy supply techniques for ice in-situ thermal mining in lunar permanently shadowed regions Adv. Space Res. (IF 2.6) Pub Date : 2024-04-09 Yan Zhang, Yun-ze Li, Jia-lin Zhang
The Moon's polar regions have abundant water ice resources. The mining and utilization of lunar polar water ice could serve as a propellant and survival resource for human exploration of deep space. The concept of thermal mining has been proposed to extract water ice resources. There are advantages and disadvantages to different mining methods. The energy problems faced by in situ resource utilization
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Research on Landsat 8 land surface temperature retrieval and spatial–temporal migration capabilities based on random forest model Adv. Space Res. (IF 2.6) Pub Date : 2024-04-09 Wenhao Zhang, Zhiyang Jia, Bo Li, Qiyue Liu, Xia Zhu, Cui Jia, Xingfa Gu, Tao Yu
Land surface temperature (LST) plays a crucial role in characterizing land surface processes and the energy balance. Accurate monitoring of spatial–temporal variations in LST holds great significance for global and regional climate change research. However, with the increasing of multi-source remote sensing data, it has become a challenging task to construct an LST model that reduces dependence on
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Orbit determination of earth-moon libration point navigation constellation based on inter-satellite links Adv. Space Res. (IF 2.6) Pub Date : 2024-04-09 Zheyu Xu, Kai Shao, Defeng Gu, Lisheng Tong, Lan Du, Cunbo Wei, Zicong An, Jubo Zhu
Earth-Moon libration point navigation constellation has a merit of fully covering the cislunar space and providing navigation services with merely a small number of satellites. Furthermore, this type of constellation itself can achieve orbit determination by using only its Inter-satellite links (ISL) owing to the well-known gravitational asymmetry near the libration points. This paper adopts a representative
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An empirical modeling of the D region ionosphere based on [formula omitted] Adv. Space Res. (IF 2.6) Pub Date : 2024-04-09 Na Li, Jinsong Chen, Zhimei Tang, Lei Zhao, Zonghua Ding, Feifei Wang
The electron density () in the D region, although its value is much smaller than that in the F region, has a highly important effect on electromagnetic wave propagation by energy absorption due to high-frequency collisions between electron-molecular, electron-ionic, molecular-ionic and so on. Solar activity is the main source of ionization in the D region of the ionosphere. The observed during 2008–2015
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Envelope trajectory optimization and tracking control for space multi-fingered mechanism Adv. Space Res. (IF 2.6) Pub Date : 2024-04-08 Houyin Xi, Bin Chen, Tianwen Chen, Xiaodong Zhang, Min Luo
Space debris are usually with diverse geometric shapes and no grappling points. Current capture methods lack the capability to adjust to the target shape dynamically. The capture of space debris remains a significant challenge for operational space missions. This paper presents a multi-finger envelope control strategy based on dynamic capture region in the pre-grasping phase. In the method, the proximal
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Shallow crustal deformation in the Yunnan-Myanmar and surrounding areas by regionally weighted interpolation of GPS measurements data Adv. Space Res. (IF 2.6) Pub Date : 2024-04-08 Bing Zhang, Yuan Gao, Tong Liu, Xuanyu Xu, Guochang Xu, Zhiping Lu, Xueshang Feng, Zhibin Yu
Yunnan-Myanmar and its surrounding areas are the areas directly affected by the collision of the Eurasian Plate and the Indian Plate. In view of the uneven distribution of GPS stations in Yunnan and Myanmar, this paper employs the method of regionally weighted interpolation. In areas with a high concentration of GPS stations, a combination of Voronoi cell weighting function and Gaussian function weighting
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A tightly-coupled PPP/visual positioning method for fast initialization and effective continuity Adv. Space Res. (IF 2.6) Pub Date : 2024-04-06 Zhiyu Cheng, Zhenyao Liu, Yang Li, Liang Wang, Ningbo Wang, Zishen Li
Precise Point Positioning (PPP) is one of the most widely used positioning methods, providing standalone positioning solutions with high accuracy. However, the algorithm usually requires tens of minutes to converge which makes the application restricted in many scenarios. The rapid developments of unmanned systems urge real-time positioning solutions with accuracy and continuity in complicated environments
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Attitude inversion of space debris based on the laboratory-tested photometry dataset Adv. Space Res. (IF 2.6) Pub Date : 2024-04-06 Shu-Shu Wang, Hou-Yuan Lin, An-Ming Kang, Jin-Rui Men, Chang-Yin Zhao
The attitude of space debris holds significant implications for active debris removal and collision warnings. This study constructs a comprehensive photometry dataset for the target, utilizing angle transformation relationships and drawing upon the CZ-4C photometric data tested in the laboratory. The photometry in the dataset with noise and translation simulates the telescope observed one. We use the
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A review on dynamic analysis of membrane based space structures Adv. Space Res. (IF 2.6) Pub Date : 2024-04-06 Amiy Chandraul, Murari V, Satish Kumar
This paper presents a comprehensive review of the diverse approaches employed to study dynamic responses of gossamer membrane structures for space applications. The primary aim of the current review article is to explore the proposals/attempts made in the literature to understand the vibration, wrinkling, and shape control phenomena of these structures using analytical, experimental, and numerical
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Active fault-tolerant attitude control based on Q-learning for rigid spacecraft with actuator faults Adv. Space Res. (IF 2.6) Pub Date : 2024-04-04 Sajad Rafiee, Mohammadrasoul Kankashvar, Parisa Mohammadi, Hossein Bolandi
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Searching for large dark matter clumps using the Galileo Satnav clock variations Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Bruno Bertrand, Pascale Defraigne, Aurélien Hees, Alexandra Sheremet, Clément Courde, Julien Chabé, Javier Ventura-Traveset, Florian Dilssner, Erik Schoenemann, Luis Mendes, Pacôme Delva
This study presents bounds on transient variations of fundamental constants, with typical timescales ranging from minutes to months, using clocks in space. The underlying phenomenology describing such transient variations relies on models for Dark Matter (DM) which suggest possible encounters of macroscopic compact objects with the Earth, due to the motion of the solar system in the galactic halo.
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A review on radiation environment pathways to impacts: Radiation effects, relevant empirical environment models, and future needs Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Insoo Jun, Henry Garrett, Wousik Kim, Yihua Zheng, Shing F. Fung, Claudio Corti, Natalia Ganushkina, Jingnan Guo
Space radiation affects every aspect of spacecraft design and operation. As a part of the ISWAT (International Space Weather Actions Teams, ) effort, this paper provides a comprehensive review of space radiation environment models that are commonly used by the spacecraft design community to estimate radiation effects on systems/components. The types of radiation effects discussed in this paper are
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Code-Carrier coherence monitoring for dual frequency SBAS Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Yiping Jiang, Jingheng Shao
User differential range error (UDRE) is used to bound satellite clock and orbit errors in satellite-based augmentation system (SBAS). The code carrier incoherence (CCI) originated from satellite payload faults may degrade generated satellite corrections and corresponding UDRE/DFRE bounding. To ease the burden on UDRE caused by the CCI induced ranging error, a code carrier coherence (CCC) monitor is
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GOCI operation during the 10 years of sun interference in COMS Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Young-Min Cho, Woo Chang Choi
A practical approach has been studied to cope with the sun interference of Earth observation geostationary satellite and the results of 10-year satellite operation for preventing sun outage are presented with detailed analysis in this paper. The Communication Ocean Meteorological Satellite (COMS) is equipped with the Geostationary Ocean Color Imager (GOCI), which performs ocean observation mission
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Comparison between GPS network analysis with undifferenced and double differenced integer ambiguity resolution: A practical perspective Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Guo Chen, Na Wei, Jun Tao, Qile Zhao
Global Navigation Satellite System (GNSS) network analysis benefits from precise point positioning with undifferenced (UD) or double differenced (DD) integer ambiguity resolution (IAR). Position time series with UD-IAR and a practical DD-IAR are compared for a mixture network consisting of 57 global and 82 regional stations with 4-year observations. The sparse global stations are more affected by different
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Landslide susceptibility prediction and mapping in Loess Plateau based on different machine learning algorithms by hybrid factors screening: Case study of Xunyi County, Shaanxi Province, China Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Xiaokang Liu, Shuai Shao, Shengjun Shao
Machine learning models are widely used for landslide susceptibility prediction (LSP). To better develop a landslide susceptibility prediction model for the Loess Plateau, this study compared different machine-learning models (Logistic regression (LR), support vector machines (SVM), random forests (RF), Naïve Bayes (NB), and multilayer perceptron (MLP)). Using Xunyi County, China as the study area
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Design optimization of a low response time thruster control valve for small satellite missions Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 Venkata Durga Prasad Yenumula
Small satellites and spacecrafts use propulsion systems to stabilize their attitude, control orientation and deorbit it at the end of the mission life. The flow and thrust of the liquid propulsion system are controlled by the control valve, typically operated by solenoid. According to recent literature, space-qualified solenoid valves are expensive and financially non viable, especially for small satellite
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Optimisation of hybrid composite shields for hypervelocity Micro-Meteoroid and Orbital Debris (MMOD) impact Adv. Space Res. (IF 2.6) Pub Date : 2024-04-03 K. Fowler, F. Teixeira-Dias
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Microwave wireless power transfer efficiency analysis framework for a thin film space solar power satellite Adv. Space Res. (IF 2.6) Pub Date : 2024-04-02 Charleston Dale Ambatali, Shinichi Nakasuka
Space-based solar power systems (SSPS) envision the usage of focused microwave beams to transfer power from space to ground. To supply a large amount of power and to be able to focus a microwave beam efficiently, a large infrastructure must be assembled in orbit, thus, making the implementation of SSPS an arduous task. In the history of SSPS designs, aside from economical obstacles, technical obstacles
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Study on temperature sheets using higher order spectral analysis Adv. Space Res. (IF 2.6) Pub Date : 2024-04-02 Ramyakrishna Enugonda, V.K. Anandan, Ashik Paul, Basudeb Ghosh
Temperature sheets have been observed in the lower stratosphere up to 20 km, with strong (positive) temperature gradients within very thin layers. These were observed from vertical profiles obtained from the Stratosphere and Troposphere (ST) radar located in Kolkata. The sheets tend to occur in groups and contribute to the regions of high static stability, inhibiting vertical air motion. Several experiments
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GRACE Follow-On accelerometer data recovery by high-precision environment modelling Adv. Space Res. (IF 2.6) Pub Date : 2024-04-01 Moritz Huckfeldt, Florian Wöske, Benny Rievers, Meike List
The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) satellites are equipped with high-precision three-axis accelerometers to measure all non-gravitational accelerations acting on the satellites. Precise knowledge of these perturbations is a major prerequisite for successful Gravity Field Recovery (GFR). Unfortunately, after only one month in orbit the accelerometer on one of the two satellites
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Land cover mapping of mixed classes using 2D CNN with multi-frequency SAR data Adv. Space Res. (IF 2.6) Pub Date : 2024-03-30 Anjana N.J. Kukunuri, Gopal S. Phartiyal, Dharmendra Singh
Synthetic aperture radar (SAR) data obtained at multiple frequencies and polarizations offers valuable complementary information for classifying mixed classes that exhibit similar backscattering response. Although deep learning-based convolutional neural networks (CNNs) effectively extract features from multi-frequency SAR data, the arbitrary ordering of SAR features may hinder optimal convolution
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Prediction of ionospheric total electron content over low latitude region: Case study in Ethiopia Adv. Space Res. (IF 2.6) Pub Date : 2024-03-30 Getahun Berhanu Alemu, Yohannes Getachew Ejigu
This study mainly focuses on the prediction of the variability of the Total Electron Content (TEC) affecting space and ground-based technological infrastructures vulnerable to extreme space weather events. The impact of solar wind conditions (SWC) can be quantified by measuring the ionosphere’s TEC. We used a machine learning (ML) algorithm based on the Support Vector Machine (SVM), Long Short-Term
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Venus cloud sample return concept for astrobiology Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Rachana Agrawal, Sara Seager, Janusz J. Petkowski, Christopher E. Carr, Weston P. Buchanan, Kathryn Bywaters, Maxim de Jong, David H. Grinspoon, Iaroslav Iakubivskyi, Isabel R. King, Sarag J. Saikia, Kris Zacny, Morning Star Mission Team
The sulfuric acid clouds of Venus are of high scientific interest due to several intriguing observations from the past decades. These observations are not fully explained with current chemical models. Manyhypotheses have been posed to date, including the presence of complex organics or microbial life in the clouds. The possibility of life is primarily supported by the biologically benign temperatures
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Application of surface energy balance Algorithm for land (SEBAL) for mapping spatiotemporal evapotranspiration over various climatic zones of Pakistan Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Benazeer Iqbal, Muhammad Ali, Beena Fahim, Jabir Nazir
To address the emerging issues of water scarcity in a hydrological realm, estimation of evapotranspiration (ET) at spatiotemporal scale is essential. It is crucial for understanding climate change, particularly for Pakistan's ongoing water resource management policy under the United Nations' Sustainable Development Goals (SDGs), where water is given top priority. In situ techniques can quantify ET
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A hybrid model for TEC prediction using BiLSTM and PSO-LSSVM Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Dengao Li, Yan Jin, Fanming Wu, Jumin Zhao, Pengfei Min, Xinyu Luo
High precision ionospheric Total Electron Content(TEC) prediction is of great significance for improving the accuracy of Global Navigation Satellite System(GNSS), preventing natural disasters, and ensuring wireless communication. Given the varying frequencies of TEC signals, a hybrid CEEMDAN-BiLSTM-PSO-LSSVM-FE model for predicting ionospheric TEC content is proposed in this paper. Firstly, complete
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Characteristics of ionospheric disturbances during the 2021 Typhoon Chanthu based on GPS and GLONASS Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Mengwei Ma, Shuanggen Jin, Xuzhan T. Jin
Severe typhoons often result in substantial economic and human losses. Therefore, near-real-time monitoring and forecasting of severe typhoons have a significant importance. In this paper, characteristics of ionospheric disturbances during the 2021 Typhoon Chanthu are estimated and investigated from GPS and GLONASS measurements. We calculate high-precision de-trended and filtered ionospheric vertical
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Application of Landsat-8 and Sentinel-2 for retrieval of chlorophyll-a in a shallow freshwater lake Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Behnaz Karimi, Seyed Hossein Hashemi, Hossein Aghighi
Remote sensing is a cost-effective method for monitoring chlorophyll- (Chl-) concentration, an indicator of eutrophication, due to its spatiotemporal effectiveness and availability of historical data. However, its application in shallow, small water bodies poses challenges due to the need for high spatial and temporal resolutions, significant optical interference from other water constituents, and
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PREFACE: Recent advances in satellite constellations and formation flying Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Margaret Ann Shea
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Retrieval of sea ice thickness from FY-3E data using Random Forest method Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Hongying Li, Qingyun Yan, Weimin Huang
In this study, we employ a Random Forest approach to estimate sea ice thickness (SIT) using Fengyun-3E (FY-3E) and Soil Moisture Ocean Salinity (SMOS) data. This method relies on four input parameters: incidence angle (), reflectivity (), sea ice salinity (), and sea ice temperature (). In addition, FY-3E can receive both Global Positioning System (GPS) and Beidou Navigation Satellite System (BDS)
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Data processing of visible emission line coronagraph onboard ADITYA-L1 Adv. Space Res. (IF 2.6) Pub Date : 2024-03-28 Muthu Priyal, Jagdev Singh, B. Raghavendra Prasad, Chavali Sumana, Varun Kumar, Shalabh Mishra, S.N. Venkata, G. Sindhuja, K. Sasikumar Raja, Amit Kumar, Sanal krishnan, Bhavana S. Hegde, D. Utkarsha, Natarajan Venkatasubramanian, Pawankumar Somasundram, S. Nagabhushana, P.U. Kamath, S. Kathiravan, T. Vishnu Mani, Suresh Basavaraju, Rajkumar Chavan, P. Vemareddy, B. Ravindra, S.P. Rajaguru, K. Nagaraju
ADITYA-L1 is India's first dedicated mission to observe the Sun and its atmosphere from a halo orbit around L1 point. Visible emission line coronagraph (VELC) is the primary payload on board Aditya-L1 to observe the Sun’s corona. VELC is designed as an internally occulted reflective coronagraph to meet the observational requirements of wide wavelength band and the field of view close to the solar limb
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Planar soft space robotic manipulators: Dynamic modeling and control Adv. Space Res. (IF 2.6) Pub Date : 2024-03-27 Mahshid Soleymani, Maryam Kiani
Space robots have proven their ability to accomplish many space missions impossible or dangerous for the human. However, the conventional space robots suffer from the low adaptability, heavy structures, and the low safety. In this regard, the bio-inspired soft robots, composed of the soft material, have been emerged to overcome these shortcomings and to expand the space missions’ diversity. The potential
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Onboard autonomous mission generation method based on user preference Adv. Space Res. (IF 2.6) Pub Date : 2024-03-27 Zhouxiao Li, Yuan Liu
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Direct measurements of cosmic – Ray iron and nickel with CALET on the International Space Station Adv. Space Res. (IF 2.6) Pub Date : 2024-03-27 O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, G. Bigongiari, W.R. Binns, M. Bongi, P. Brogi, A. Bruno, N. Cannady, G. Castellini, C. Checchia, M.L. Cherry, G. Collazuol, G.A. de Nolfo, K. Ebisawa, A.W. Ficklin, H. Fuke, S. Gonzi, T.G. Guzik, T. Hams, K. Hibino, M. Ichimura, K. Ioka, W. Ishizaki, M.H. Israel, K. Kasahara, J. Kataoka, R. Kataoka, Y. Katayose, C. Kato, N. Kawanaka, Y. Kawakubo
Iron and nickel cosmic ray nuclei play a key role in the understanding of the acceleration and propagation mechanisms of charged particles in our Galaxy. In fact, iron and nickel are the most abundant nuclei among the heavy elements and provide favorable conditions for a low background measurement thanks to the negligible contamination from spallation of higher mass elements. CALET, operating on the
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Opportunities and challenges of on-board AI-based image recognition for small satellite Earth observation missions Adv. Space Res. (IF 2.6) Pub Date : 2024-03-26 Bharadwaj Chintalapati, Arthur Precht, Sougata Hanra, Rene Laufer, Marcus Liwicki, Jens Eickhoff
The satellite industry is rapidly growing. There has been a significant increase in the number of new small satellites that are launched, which is complemented by the rapid pace of the development of image recognition algorithms. Convolutional neural networks (CNNs) in particular, have achieved state-of-the-art performance in computer vision related applications. Combining both and running an AI algorithm
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Non-equilibrium and anisotropy in Titan atmosphere entry Adv. Space Res. (IF 2.6) Pub Date : 2024-03-26 Gennaro Zuppardi, Giuseppe Mongelluzzo
Titan is the largest moon of Saturn. It is the only moon in our solar system provided with atmosphere. Therefore, exploration of Titan demands aerodynamic computations aimed at a proper design of space vehicles that will bring instruments to its surface. To this purpose, the aerodynamic computing methodologies are Computational Fluid Dynamics (CFD) for the solution of continuum flow fields and Direct
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Ionospheric observations from formation flying spacecraft Adv. Space Res. (IF 2.6) Pub Date : 2024-03-26 Matthew Feggeler, Scott L. England
The equatorial ionosphere exhibits remarkable variability on a variety of spatial and temporal scales, and therefore observations of this region remain critical. Remote sensing from the ground offers an opportunity to get high resolution observations, but only at a few locations. Remote sensing from space offers the possibility of characterizing the region on a global-scale but can miss some of the
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Prediction of ionospheric TEC using a GRU mechanism method Adv. Space Res. (IF 2.6) Pub Date : 2024-03-26 Jun Tang, Chang Liu, Dengpan Yang, Mingfei Ding
In this paper, we propose a gate recurrent unit (GRU) method to forecast ionospheric the total electron content (TEC) at different latitudes and longitudes. This method aims to address the issues of low accuracy in traditional neural networks and the challenges faced in training long-term time series. We construct a GRU model using TEC data from the European Orbit Determination Center (CODE) for the
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Quantitative analysis of the tropospheric delay differences for 1–300 GHz microwave signals with ground-based microwave radiometric profiles Adv. Space Res. (IF 2.6) Pub Date : 2024-03-25 Jun Jiang, Shuli Song, Weili Zhou, Jialong Liu, Na Cheng, Hongzhan Zhao, Chao Huang
Tropospheric delay is a significant source of error in various microwave measurement technologies. As the tropospheric delay differences associated with the signal frequency can be neglected for signals near the L band, the Global Navigation Satellite System (GNSS) is frequently used to assist other microwave measurements on tropospheric delay correction for its high precision and all-weather capabilities
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On the anomalous cosmic-ray helium spectra during consecutive solar minima Adv. Space Res. (IF 2.6) Pub Date : 2024-03-24 O.G. Morales-Olivares, R.A. Caballero-Lopez
The anomalous cosmic rays have been studied for about fifty years. Through theoretical and numerical models, we can learn how and where they are originating. When Voyager 1 and 2 spacecraft observed the solar wind termination shock, the main efforts were focused on try to explain the source spectrum and the acceleration mechanism. Nevertheless, there is another feature of the spectrum that need a better
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Numerical simulation of rigid-flexible coupled dynamics for an inflatable sphere deorbiting device Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 Yan Xu, Yilong Yang, He Huang, He Jia, Guanhui Fang
Inflatable spheres can be applied to the aerodynamic drag deorbiting device for satellites. It may bring about a complicated dynamic problem under the disturbance from the lightweight large-volume inflatable sphere to the satellite. In order to explore this problem, rigid-flexible coupled dynamics behaviors of satellite-sphere system during inflating process are numerically studied in this paper. The
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Performance evaluation of different reflected signal extraction methods on GNSS-R derived sea level heights Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 Chi–Ming Lee, Cheng–Yun Fu, Wen–Hau Lan, Chung–Yen Kuo
In order to obtain reliable GNSS-R derived sea level heights (SLHs), it is crucial to extract accurate reflected signals from signal-to-noise ratio (SNR) data. In this study, Quadratic Fitting, Empirical Mode Decomposition (EMD), Ensemble Empirical Mode Decomposition (EEMD), and Singular Spectrum Analysis (SSA) are adopted for extracting the reflected signals from SNR data, which are then analyzed
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Comparison of three machine learning algorithms for retrieving soil moisture information from Sentinel-1A SAR data in northwest Shandong plain, China Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 Chenglei Hou, Mou Leong Tan, Longhui Li, Fei Zhang
Soil moisture (SM) plays a critical role in the growth and management of grain in semi-humid regions. However, little is known about how to integrate satellite data with machine learning to accurately retrieve SM information in these areas. This study compares the capability of three machine learning algorithms, Random Forest (RF), Support Vector Machine (SVM), and Artificial Neural Network (ANN),
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TEC variations and IRI-2016, IRI-2020 and IRI-Plas performance in Mexico Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 V.J. Gatica-Acevedo, M.A. Sergeeva, O.A. Maltseva, J.A. Gonzalez-Esparza, A. Melgarejo-Morales, I.D. Orrala-Legorreta
The present work discusses TEC variations over Mexico and their representation by the advanced ionospheric models IRI-2016, IRI-2020 and IRI-Plas during the years of low and increasing solar activity, 2018–2022. The statistical estimates Mean Absolute Error (MAE), Root Mean Square Error (RMSE) and Normalized Root Mean Square Error (NRSME) were used to assess model performances. The earlier revealed
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Electron plasma resonances detected by a mutual admittance probe in the equatorial ionosphere Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 S. Prakash, R.N. Misra, H. Chandra
A mutual impedance probe was developed at the Physical research Laboratory, Ahmedabad and flown on a Nike-Apache rocket launched from Thumba, near the magnetic equator in India near noon on 3 March 1973. The experimental details and the results obtained are presented in this communication. Electron density values obtained from Langmuir probe during the same flight are close to values obtained from
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Analysis of factors affecting the estimation of the multi-GNSS satellite differential code biases (SDCBs) Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 Yifan Wang, Min Li, Yunbin Yuan, Gang Wen, Fangrong Zhou, Hao Geng
The satellite hardware differential code biases (SDCBs) are one of the important factors affecting the accuracy of GNSS-based ionospheric total electron content (TEC) estimation. The accuracy of SDCB estimates is directly influenced by the data processing methodology. To analyze the impact of various factors on multi-GNSS SDCB estimation, we conducted a comprehensive analysis of the number of contributed
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Synthetic control with target sticking for on-orbit capturing using a dual-arm space robot Adv. Space Res. (IF 2.6) Pub Date : 2024-03-21 Xinhui Xia, Yinghong Jia
On-orbit capturing is a crucial step in the application of dual-arm space robots, aiming to accurately grasp a moving target and avoid damage to the arms terminal parts (i.e. the end effectors) due to contact force saturation. This paper presents a synthetic control method with target sticking for on-orbit capturing using a dual-arm space robot system from the approaching phase to pre-grasping phase