Advances in Space Research最新文献

{"title":"Extreme flash flood susceptibility mapping using a novel PCA-based model stacking approach","authors":"Amirreza Shojaeian ,&nbsp;Hossein Shafizadeh-Moghadam ,&nbsp;Ahmad Sharafati ,&nbsp;Himan Shahabi","doi":"10.1016/j.asr.2024.08.004","DOIUrl":"10.1016/j.asr.2024.08.004","url":null,"abstract":"<div><div>This study introduces an efficient methodology for model stacking, incorporating six diverse machine learning and statistical models alongside principal component analysis (PCA). The approach is applied for the flash flood susceptibility mapping within the Karkheh Basin in Iran. The selected models include random forest (RF), boosted regression trees (BRT), support vector machine (SVM), artificial neural networks (ANN), generalized additive model (GAM), and the least absolute shrinkage and selection operator (Lasso), with RF also serving as the <em>meta</em>-model for the stacking. The results revealed significant correlations among the predictions of the individual models, which could potentially impact the <em>meta</em>-model’s efficacy. To address this, PCA was applied to the model predictions to generate de-correlated components as inputs for the <em>meta</em>-model, thereby enhancing prediction accuracy and robustness. Evaluation based on the area under the receiver operating characteristic (AUROC) curve demonstrated that the GAM outperformed all other individual models with the highest accuracy score of 0.924. In contrast, the RF and ANN models had the lowest accuracy, both registering at 0.872. However, the performance disparity across models was minimal. Notably, the PCA-based stacking approach (0.936) surpassed both traditional model stacking (0.912) and the performances of all individual models, advocating for its use in enhancing predictive accuracy. These findings endorse the PCA-stacking method over conventional stacking techniques. Nonetheless, further research across varied applications is warranted to generalize its efficacy.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 5371-5382"},"PeriodicalIF":2.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of multi-date Sentinel-2 data for field-level monitoring of isabgol (Plantago ovata Forsk) cropping practices in India","authors":"Paras Hirapara,&nbsp;Sandip Patel,&nbsp;R. Nagaraja Reddy,&nbsp;Sujay Dutta ,&nbsp;P. Manivel,&nbsp;B.B. Basak,&nbsp;B.K. Bhattacharya ,&nbsp;Manish Das","doi":"10.1016/j.asr.2024.08.001","DOIUrl":"10.1016/j.asr.2024.08.001","url":null,"abstract":"<div><div>Accurate identification and mapping of isabgol fields help in macro-level planning in the arid and semi-arid regions, where variability is very high due to erratic weather conditions, besides providing the production estimates of the crop. Isabgol is an important medicinal crop cultivated in western India. This study aims to accurately identify isabgol growing area at field level with help of progressive remotely sensed satellite data. Sentinel-2 data was used for the first crop season (2020) and the second crop season (2021) for the isabgol crop classification. Cluster to cluster comparison between satellite driven data and ground control point has been done for accuracy assessment. The producer accuracy ranged from 63.80 to 88.00% for the first crop (2020) and 70.84 to 88.89% for the second crop (2021). Our results were in sync with revenue records data (0.95 and 0.99 correlation for the first and second crop seasons, respectively). We found improved producer accuracy for the first crop over the second crop. The results shown that the time series Sentinel-2 data could be used for isabgol identification in various regions of India. The remote sensing-based methods could be used for precise estimation of isabgol crop acreage will help predict demand and supply. This information is valuable to the researchers, policy makers, pharmaceutical industries, and agronomists to accurately address issues related to import/export of isabgol and price fixation.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 5305-5318"},"PeriodicalIF":2.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142655664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of interplanetary shock on nitric oxide cooling emission: A superposed epoch study","authors":"Tikemani Bag,&nbsp;Y. Ogawa","doi":"10.1016/j.asr.2024.08.005","DOIUrl":"10.1016/j.asr.2024.08.005","url":null,"abstract":"<div><div>The impact of interplanetary (IP) shock on Nitric Oxide (NO) 5.3 µm cooling emission is studied during geomagnetic quiet periods. The Active Magnetosphere and Planetary Electrodynamics Response Experiment measurements of field-aligned-currents intensify during IP shock with a relatively higher magnitude in southern hemisphere as compared to the northern hemispheric counterpart. The Defense Meteorological Satellite Program spacecraft observations displayed an early and strong enhancement in the precipitating particle flux of energy less than 1 keV. The particle flux of higher energy responds at later time. The NO density exhibited a significant, pre-event increase by an order of magnitude due to low-energy particle precipitation. The thermospheric temperature increased by about 100 K at 400 km. The superposed epoch analysis study revealed a linear enhancement in SABER (Sounding of the Atmosphere using Broadband Emission Radiometry) measurements of NO cooling emission onboard the TIMED (Thermosphere Ionosphere Mesosphere Energetics Dynamics) satellite due to the prompt increase in particle precipitations and thermospheric temperature triggered by IP shock.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 6012-6019"},"PeriodicalIF":2.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of SimulCam, a standoff Raman system for scientific support of SuperCam operations on Mars","authors":"Jose A. Manrique ,&nbsp;Guillermo Lopez-Reyes ,&nbsp;Marco Veneranda ,&nbsp;Aurelio Sanz-Arranz ,&nbsp;Juan Sancho Santamaria ,&nbsp;Sofia Julve-Gonzalez ,&nbsp;Ivan Reyes-Rodríguez ,&nbsp;Teresa Fornaro ,&nbsp;Juan Manuel Madariaga ,&nbsp;Gorka Arana ,&nbsp;Kepa Castro ,&nbsp;Ivair Gontijo ,&nbsp;Ann M. Ollila ,&nbsp;Shiv K. Sharma ,&nbsp;Roger C. Wiens ,&nbsp;Sylvestre Maurice ,&nbsp;Fernando Rull-Perez ,&nbsp;SuperCam Raman Working Group","doi":"10.1016/j.asr.2024.08.007","DOIUrl":"10.1016/j.asr.2024.08.007","url":null,"abstract":"<div><p>During the development activities of SuperCam Calibration Target, target intended for one of the two first Raman instruments to be deployed on another planetary body, our group developed a laboratory instrument that could simulate to some extent the Raman capabilities of one of such instruments and could provide data with similar quality. The use of this kind of laboratory instruments has demonstrated its utility in the evaluation of potential calibration targets or anticipating the science outcome that an instrument could provide. The present work describes our laboratory setup to support SuperCam, evaluating similarities between both instruments, despite of differences in the hardware. Evaluation of data gathered by SuperCam on Mars and the availability of one replica of SuperCam’s Calibration Target allowed the comparison on the same set of targets, demonstrating how similar Signal-to-Noise Ratio (SNR) could be achieved from both instruments. The higher energy per pulse on SimulCam is compensated by a greater analytical footprint and the use of smaller collection optics. The results show how spectra obtained at representative distances of SuperCam are comparable. Operational principles are also comparable in terms of time resolution, and close in terms of spectral resolution.</p><p>This similarity has allowed different science support works using SimulCam data, as well as the support to Mars detections using our setup. We provide examples of this support that will be shared with the community in different papers, as well as examples of possible operations activities that could benefit from experiments performed with SimulCam. We show how this setup can complement the two laboratory replicas in Los Alamos and Toulouse in providing support data to different experiments.</p></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 8","pages":"Pages 3855-3876"},"PeriodicalIF":2.8,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S027311772400810X/pdfft?md5=07fb9302d20960e5b4f8d5133ed75545&pid=1-s2.0-S027311772400810X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of background wind and dissipation processes on the diurnal component of atmospheric solar tides","authors":"Naresh Reddimalla, Geeta Vichare, J.V. Ramana Murthy","doi":"10.1016/j.asr.2024.07.079","DOIUrl":"https://doi.org/10.1016/j.asr.2024.07.079","url":null,"abstract":"The radiation coming from the Sun heats the Earth’s atmosphere and generates atmospheric tides. In this paper, we model atmospheric tides in the presence of background wind and dissipation processes and investigate their effects. The equations for tidal oscillations of wind and temperature in the atmosphere encompass factors such as background wind, temperature profile, and background composition including ozone, carbon dioxide, hydro-magnetic interactions, Newtonian cooling, eddy, and molecular diffusion. These components interact to define the behavior of tidal phenomena comprehensively. Thermal forcing processes include the insolation absorption of HO in the troposphere, O in the stratosphere, and a contribution from O absorption in the thermosphere. The method of solution for the equations is outlined for the solar diurnal tides during the March equinox by considering all these dissipation processes and the background wind. The obtained results are in good agreement with the Global Scale Wave Model (GSWM-00). It is found that the background wind plays significant role in affecting the horizontal wind oscillations below 100 km. At higher altitudes (100–200 km), the background wind, ion drag force, divergence of momentum, and heat fluxes due to molecular and eddy diffusion have a considerable role in affecting the zonal and meridional winds.","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"28 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reinforcement learning-based satellite formation attitude control under multi-constraint","authors":"Yingkai Cai ,&nbsp;Kay-Soon Low ,&nbsp;Zhaokui Wang","doi":"10.1016/j.asr.2024.07.084","DOIUrl":"10.1016/j.asr.2024.07.084","url":null,"abstract":"<div><div>As the complexity of space missions increases, the constraints on satellite attitude control become more stringent, particularly for satellites working in orbit formation. This paper introduces a novel method, based on the categorization and modeling of different constraints, for attitude control of satellite formations under multiple constraints. The method employs the Phased Priority Reinforcement Learning (PPRL) approach, which utilizes Deep Deterministic Policy Gradient (DDPG) technology. Considering the complexity of constraints and the challenge posed by the high control dimensionality due to multi-satellite coordination, the method addresses these challenges through a two-step training strategy. The first step addresses the multi-constraint issue for individual satellites and increases the priority of single-satellite training experience data in the experience replay buffer of the second step to enhance data utilization efficiency. To address the issue of reward sparsity in complex high-dimensional constraint models, a detailed reward mechanism is proposed, incorporating both local and global constraints into the reward function, thereby achieving both efficient and effective attitude control. This approach not only meets dynamic, state, and performance constraints but also demonstrates adaptability and robustness through numerical simulations. Compared to traditional methods, this approach achieves significant improvements in control performance and constraint satisfaction, offering a novel solution pathway for high-dimensional control problems in multi-constraint satellite formations.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 5819-5836"},"PeriodicalIF":2.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Longitudinal variability of complexities associated with equatorial electrojet and its coupling with Solar Quiet Daily variation Sq field","authors":"Babatunde Rabiu, Samuel Ogunjo, Oluwakemi Dare-Idowu, Ibiyinka Fuwape","doi":"10.1016/j.asr.2024.07.075","DOIUrl":"https://doi.org/10.1016/j.asr.2024.07.075","url":null,"abstract":"The large-scale solar quiet (Sq) current and the Equatorial Electrojet (EEJ) current are two structures produced by electric current in the Earth’s ionosphere. For a long time, the characteristics of these two currents, particularly whether the EEJ is an extended portion of the Sq current has been a hot topic within the community. This study examined magnetic data obtained from ground-based magnetometers at 6 representative stations for the year 2009 and for geomagnetically quiet days (). The selected stations are along the magnetic equator in the South America (Huancayo), Africa (Ilorin; Addis Ababa), and the Philippines (Langkawi, dip latitude ; Davao, dip latitude ; Yap, dip latitude ). Results showed that both current systems are complex, and this complexity varies significantly from one longitudinal station to another. The strongest and weakest complexity were found in Huancayo and Ilorin, respectively. Afterwards, using four entropy quantifiers (Phase synchronization, Mutual Information, Ensemble Symbolic Coupling Traces, and S-independence), this study examined the relationship between the EEJ and Sq currents. Results revealed clearly a significant information exchange between both currents; that is, the Sq and EEJ currents are indeed coupled. As a step further, using the transfer entropy approach, a directional investigation was carried out to ascertain the direction of information flow between the Sq and EEJ stations. Observations revealed that due to the weak coupling obtained over the African sectors, only the currents over these stations exchanged information. This study further discussed the possible physical mechanisms responsible for the identified variabilities.","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"27 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrodynamic dust shield efficiency characterisation under UV in vacuum for lunar application","authors":"Ya-Chun Wang ,&nbsp;Fabrice Cipriani ,&nbsp;Fredrik Leffe Johansson ,&nbsp;Matthias Sperl ,&nbsp;Masato Adachi","doi":"10.1016/j.asr.2024.07.082","DOIUrl":"10.1016/j.asr.2024.07.082","url":null,"abstract":"<div><div>Dust mitigation is one of the most crucial aspects of extraterrestrial exploration. This paper presents a series of experiments on the electrodynamic dust shield (EDS) and how UV radiation affects its efficiency on selected lunar simulants (LHS-1 and LMS-1) across a range of particle sizes, quantities, and surface materials. In this experimental study, VUV is used with a 1500 V AC electric field to mobilise the dust particles resting on either glass, Kapton, or Beta cloth inside a vacuum chamber at <span><math><mrow><mo>∼</mo></mrow></math></span><span><math><mrow><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>6</mn></mrow></msup></mrow></math></span> mbar. The dust removal efficiency is characterised by two quantifying methods: weighing and solar array light transmission. The experimental results show that EDS activation under continuous UV exposure on the simulant particles improves the dust removal rate by 40 to 80 percentage points across all surfaces, with the exception of certain particle size ranges on Beta cloth. The primary force facilitating particle mobilisation was identified as the repulsive electrostatic force, enhanced by ionising mechanisms such as photoemission.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 6194-6204"},"PeriodicalIF":2.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prescribed modal vibration control and disturbance load analysis of rigid-flexible satellites","authors":"Zeqiang Han,&nbsp;Hongwei Xia,&nbsp;Guan Wang,&nbsp;Guangcheng Ma","doi":"10.1016/j.asr.2024.07.083","DOIUrl":"10.1016/j.asr.2024.07.083","url":null,"abstract":"<div><div>We investigate the vibration control issues of rigid-flexible satellites and present a novel control methodology for vibration suppression during attitude maneuvers. Within the vibration model, we derive the terms of the disturbance load on each vibration mode, meticulously analyzing their effects. To reduce the impact of the disturbance load on vibration modes, the prescribed modal vibration control is proposed for vibration suppression, encompassing model adjustment, optimization of actuator/sensor deployment, and controller design. The effectiveness and the advantage of the prescribed modal vibration control are demonstrated through numerical simulations. This methodology achieves proper controlled vibration modes selection and optimized deployment, thereby amplifying the effect of vibration suppression in the presence of disturbances relative to extant vibration control methodologies.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 11","pages":"Pages 5698-5712"},"PeriodicalIF":2.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ELF emission in the topside ionosphere from the ZEVS transmitter detected by CSES satellite","authors":"Vyacheslav Pilipenko ,&nbsp;Shufan Zhao ,&nbsp;Natalia Savelieva ,&nbsp;Nikolay Mazur ,&nbsp;Evgeniy Fedorov ,&nbsp;Zhenhui Ma","doi":"10.1016/j.asr.2024.07.074","DOIUrl":"10.1016/j.asr.2024.07.074","url":null,"abstract":"<div><div>The extremely-low-frequency (ELF) response in the upper ionosphere to ground large-scale transmitter ZEVS on the Kola Peninsula has been detected by low-Earth orbiting satellite CSES (<span><math><mrow><mo>∼</mo></mrow></math></span>500 km altitude). When the satellite was in the vicinity of the ZEVS transmitter above the White Sea (horizontal distance <span><math><mrow><mo>∼</mo></mrow></math></span>400–900 km), the electric and magnetic sensors detected a narrowband 82 Hz emission with amplitudes <span><math><mrow><mi>E</mi><mo>≃</mo><mn>1</mn><mo>-</mo><mn>3</mn></mrow></math></span> <span><math><mrow><mi>μ</mi></mrow></math></span>V/m and <span><math><mrow><mi>B</mi><mo>≃</mo><mn>0.5</mn><mo>-</mo><mn>1.0</mn></mrow></math></span> pT. We modeled the ELF wave field spatial structure in the upper ionosphere excited by an oscillating 82 Hz linear current with the 60 km length suspended above a high-resistive ground. Realistic altitudinal profiles of the plasma parameters during events under study have been reconstructed with the use of the IRI ionospheric model. The modeled amplitudes of electromagnetic response of the upper ionosphere are in reasonable agreement with the 82-Hz emission power recorded by the CSES satellite for a typical transmitter current intensity <span><math><mrow><mo>&gt;</mo><mn>100</mn></mrow></math></span> A.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"74 10","pages":"Pages 4937-4947"},"PeriodicalIF":2.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141945372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}