Advances in Space Research最新文献

{"title":"An improved carrier phase-based RAIM method applied to GNSS RTK positioning integrity for landslide monitoring","authors":"Zhixin Wu ,&nbsp;Yingchun Yue ,&nbsp;Mingkui Wu","doi":"10.1016/j.asr.2025.07.040","DOIUrl":"10.1016/j.asr.2025.07.040","url":null,"abstract":"<div><div>Global navigation satellite system (GNSS) has been widely used for real-time monitoring of landslides since it can provide real-time, high-precision, and continuous three-dimensional deformation all-day and all-weather. However, the GNSS navigation signals are susceptible to be affected by the complex observational environment, which will seriously degrade the accuracy and reliability of landslide deformation monitoring. This contribution aims to preliminarily investigate and evaluate the performance of GNSS real-time kinematic (RTK) positioning integrity for landslide monitoring under complex observational environment. We first propose an improved carrier phase-based receiver autonomous integrity monitoring (CRAIM) method based on the Kalman filter that takes into account the correction of the multipath error and the refinement of stochastic model (referred to as MS-CRAIM). Then we evaluate the performance of the proposed method using a set of raw GNSS data that collected in a practical landslide monitoring scenario. The experimental results demonstrate that the proposed MS-CRAIM method can significantly reduce the probability of extremely large errors compared to the standard CRAIM algorithm. The positioning errors in the horizontal and vertical components with a 99 % confidence level are reduced from about 9.3 mm and 41.9 mm to about 5.4 mm and 18.9 mm, respectively, with reductions of approximately 41.9 % and 54.9 %, respectively. The positioning root-mean-square (RMS) errors in the horizontal and vertical components are reduced from about 4.9 mm and 11.9 mm to 2.8 mm and 4.7 mm, with improvements of 42.9 % and 60.5 %, respectively. Furthermore, the MS-CRAIM method can significantly improve the reliability of real-time monitoring and the availability of the monitoring system. The horizontal and vertical protection levels can also effectively bound the positioning errors, with average values of 3.8 cm and 8.5 cm, respectively. The availability in the horizontal and vertical components are improved from about 82.7 % and 75.4 % to 98.1 % and 98.5 %, respectively.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4046-4060"},"PeriodicalIF":2.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099155","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":"Hypersonic trajectory prediction based on partially observable information","authors":"Fangjia Lian,&nbsp;Bangjie Li,&nbsp;Qisong Yang,&nbsp;Jiufen Zhao","doi":"10.1016/j.asr.2025.07.039","DOIUrl":"10.1016/j.asr.2025.07.039","url":null,"abstract":"<div><div>The precise prediction of reentry trajectories under sparse telemetry conditions presents a formidable challenge in aerospace engineering, critically impacting mission safety and recovery reliability. While contemporary approaches leveraging numerical simulations and machine learning demonstrate complementary advantages, they fundamentally struggle to cope with sparse observation data and strong nonlinear dynamics arising from active energy management strategies. To address these limitations, we propose Deformable Cross-Attention Residual LSTM (DCAR), a physics-informed deep learning architecture that synergistically integrates energy management pattern recognition with adaptive spatiotemporal feature extraction. The extensive evaluation of the trajectory of Common Aero Vehicles (CAVs) has demonstrated the outstanding performance of DCAR, and these advances have established a new paradigm for robust reentry prediction systems.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4314-4335"},"PeriodicalIF":2.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099019","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":"UAV state estimation based on mixture generalized minimum error entropy smooth variable structure filter","authors":"Yuzhao Jiao,&nbsp;Caoping Niu,&nbsp;Taishan Lou,&nbsp;Xuetao Li,&nbsp;Shuai Chang","doi":"10.1016/j.asr.2025.07.041","DOIUrl":"10.1016/j.asr.2025.07.041","url":null,"abstract":"<div><div>The strong maneuverability of Unmanned Aerial Vehicle (UAV) targets and the non-Gaussian characteristics of radar measurement noise can degrade the accuracy of state estimation methods reliant on precise motion models and Gaussian measurement noise assumptions, potentially leading to filter divergence. To address the challenges of UAV state estimation with uncertain motion models and non-Gaussian noise, this paper proposes a novel state estimation method based on the Mixture Generalized Minimum Error Entropy Smooth Variable Structure Filter (MGMEE-SVSF). The uncertainty error in motion model parameters is quantified by a time-varying Smooth Boundary Layer (SBL). If the norm of the SBL error exceeds a set threshold, the position is updated by the gain iteration of Mixture Generalized Minimum Error Entropy (MGMEE). Otherwise, the update is performed by the gain of Smooth Variable Structure Filter (SVSF), which has lower computational complexity. Finally, the proposed algorithm is compared with the Extended Kalman Filter (EKF), Minimum Error Entropy (MEE), MGMEE, and SVSF for various scenarios. Specifically, these comparisons are conducted in both Gaussian and non-Gaussian measurement noise conditions during UAV turns and mixed motion. The results demonstrate that the proposed state estimation algorithm offers better robustness and lower tracking errors compared to the other methods.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4679-4692"},"PeriodicalIF":2.8,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099430","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":"Seismic interferometry with mobile spaceborne platforms","authors":"Nicholas Dorogy ,&nbsp;Paul Sava ,&nbsp;Erik Asphaug","doi":"10.1016/j.asr.2025.07.020","DOIUrl":"10.1016/j.asr.2025.07.020","url":null,"abstract":"<div><div>Understanding the deep interior structure of small planetary bodies is crucial for improving planetary formation and evolution theories, deflecting potentially hazardous near-Earth objects, and mapping the distribution of resources vital for sustained human exploration (e.g., water ice). Radar is a commonly-used remote exploration tool, but scattering and attenuation effects can limit its depth of penetration to the near subsurface. Seismic acquisition, however, is well suited to study deep interior structure, although landing seismic instrumentation on a planet or small body is complex and risky. To acquire seismic data remotely, we can use remote sensing seismometers that measure surface motion with laser Doppler vibrometers (LDVs). In lieu of active sources (kinetic impactors and explosives) which could eject debris that are hazardous for spacecraft operation, naturally occurring seismic activity can be used to recover travel times according to the theory of seismic interferometry. However, orbiter-mounted LDVs are mobile and thus sample different points on the ground unlike conventional seismometers that observe a fixed point. In this paper, we adapt the theory of seismic interferometry to account for receiver motion using asteroid 99942 Apophis as a test demonstration. We use artificially stimulated internal sources to mimic natural seismicity thus enabling acquisition with the remote sensing seismometer configuration. This technique provides the ability to remotely collect seismic data without the risks associated with landed instruments and active seismic sources.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4747-4764"},"PeriodicalIF":2.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099433","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":"Vibrational spectroscopic, thermophysical, and structural properties of two Antarctic howardites: EET 87503 and QUE 97001","authors":"Ozan Unsalan ,&nbsp;Cisem Altunayar-Unsalan ,&nbsp;Bernardo A. Nogueira ,&nbsp;Melanie Kaliwoda ,&nbsp;Rui Fausto","doi":"10.1016/j.asr.2025.07.038","DOIUrl":"10.1016/j.asr.2025.07.038","url":null,"abstract":"<div><div>This study uses optical microscopy, Raman spectroscopy, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) to examine the Antarctic howardite meteorites EET 87503 and QUE 97001. DSC results revealed troilite phase transitions in EET and QUE at 146.66 and 147.50 °C, corresponding to 0.26 % and 0.13 % troilite content, respectively. TGA indicated minor weight loss (&lt;1 %) in both samples, with EET showing 0.399 % and QUE 0.638 % weight loss upon heating up to 1200 °C. Raman spectroscopy confirmed the presence of key minerals, including enstatite, ferrosilite, diopside, forsterite, ilmenite, and anorthite, as well as, in the case of the QUE 97001 meteorite, monticellite, a rare magnesium-end-member silicate olivine type mineral, providing insights into the complex thermal and impact histories of these howardites. The present findings appear as a contribution to a better understanding of the mineralogy and thermal evolution of this type of meteorites, linking them to potential parent bodies such as asteroid 4Vesta.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4765-4780"},"PeriodicalIF":2.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099434","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":"Enhancing detection of satellite laser ranging signal in low signal-to-noise ratio conditions","authors":"Julian Rodriguez-Villamizar ,&nbsp;Matthew Wilkinson ,&nbsp;Nicolas Maurice ,&nbsp;José Carlos Rodríguez ,&nbsp;Toshimichi Otsubo","doi":"10.1016/j.asr.2025.07.035","DOIUrl":"10.1016/j.asr.2025.07.035","url":null,"abstract":"<div><div>Laser ranging stations encounter low signal-to-noise returns when acquiring more distant satellite targets at lower elevations and in poorer atmospheric conditions. Signal tracks from successful detections of the retro-reflected light returning from a satellite can be identified in repeated range residuals that will also contain background noise. A close look at different observing scenarios and methods used to extract the satellite returns from background noise, developed over time at lunar and satellite laser ranging stations, reveals similar binning, trend removal and threshold approaches tuned to the individual stations, considering so far only parallelogram shapes. To generalise this common signal identification problem at laser ranging stations, the distribution of data recorded during a satellite pass is described using Poisson statistics, accounting for both the signal and noise elements. A model is then outlined and tested against real observations. We propose a method for the reduction of noise for the first-photon arrival effect typical of single-photon avalanche diodes (SPAD).</div><div>The number of entries that fall inside a 2D bin is compared against a threshold, defined by the likelihood ratio, to decide if the observed mean rate is closer to the one of the noise or of the signal. For the optimization of the bin size and threshold, we use Receiver Operating Characteristic (ROC) curves to choose the values that maximize true signal detection with minimum false positives.</div><div>We consider a new geometrical pattern for the 2D binning of the observation domain. The new pattern consists of hexagons and an improvement of 20 % in signal detection was achieved compared to using equivalent parallelogram bins.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 6","pages":"Pages 3465-3479"},"PeriodicalIF":2.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863877","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":"Analyzing the disparity between carbon concentration and absorption, and its urban climate implications in Dhaka: a google earth engine based case study","authors":"Md. Zahid Hasan ,&nbsp;Sumaia Kashem ,&nbsp;Ragib Mahmood Shuvo ,&nbsp;Prem Kumer Ghosh ,&nbsp;Wasikul Islam Romit","doi":"10.1016/j.asr.2025.07.037","DOIUrl":"10.1016/j.asr.2025.07.037","url":null,"abstract":"<div><div>This study delves into the critical issue of climate change in Dhaka, Bangladesh, a rapidly urbanizing city with significant carbon emissions. The primary objective is to examine the disconnect between carbon concentration and absorption in Dhaka and its consequential impact on the urban climate. The study employs a comprehensive analysis of land use and land cover (LULC) patterns, carbon concentration levels, and temperature trends in the city. Leveraging the Support Vector Machine (SVM) algorithm, the research assesses changes in LULC using Landsat images from 2011 to 2022. Concurrently, data related to carbon concentration is gathered and analyzed to evaluate the overall carbon content in the city’s environment. The comprehensive examination reveals how LULC influences the city’s carbon sequestration capacity and consequently shapes the long-term urban climate. The rapid urban expansion, characterized by a significant increase in built-up areas (8 %), has reduced the city’s capacity for carbon sequestration (−30 %), resulting in a substantial rise in carbon content (+49.6 %) in the city environment. This transformation has led to a notable increase in average maximum daytime (+0.85 °C) and night-time temperatures (+0.93 °C). This interloop identified in the study underscores the critical need for sustainable urban planning to ensure the sustainability of Dhaka’s urban climate.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4032-4045"},"PeriodicalIF":2.8,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099154","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":"Preliminary investigation of planar Sun-Ceres trajectories in variable restricted dynamical models","authors":"Robert A. Bettinger,&nbsp;Elliot A. Potter,&nbsp;Conner S. O’Malley,&nbsp;Annika J. Gilliam,&nbsp;Tyler J. Kapolka","doi":"10.1016/j.asr.2025.07.027","DOIUrl":"10.1016/j.asr.2025.07.027","url":null,"abstract":"<div><div>The dwarf planet Ceres is the largest body in the Asteroid Belt and represents a key destination for planetary science missions seeking to understand the evolution of small bodies. Due to its location on the boundary between the inner and outer planets of the Solar System, Ceres could become a lucrative base camp location for asteroid mining and surveying operations, or a way-station for outer planet missions. This paper, for the first time in literature, presents 93 unique planar periodic and quasi-periodic orbits discovered in the Sun-Ceres system that may be employed for Ceres-focused missions. The Circular Restricted Three-Body Problem (CR3BP) and Circular Restricted N-Body Problem (CRNBP) are used as the primary dynamical models for orbit generation. The CR3BP orbits were discovered using a combination of Poincaré mapping and grid search techniques for 10 different Jacobi constants. For the CRNBP, the system is expanded to include not only the Sun and Ceres, but also Earth, Mars, and Jupiter as perturbing gravitational bodies. Poincaré mapping was also employed for the CRNBP, but with two sets of initial grid conditions corresponding to CR3BP Jacobi constant values and two initial phase angle cases for the included bodies. For all discovered orbits, specific initial position and velocity states are provided, accompanied by recommendations for their potential mission applications. This research aims to advance ongoing astrodynamics research by filling a catalog hole and providing a Sun-Ceres orbit baseline for two different multi-body restricted models.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 6","pages":"Pages 3595-3646"},"PeriodicalIF":2.8,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863352","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":"System temperature prediction and verification of all-sky electrostatic analyzer on the lunar surface","authors":"Tsung-Pin Hung ,&nbsp;Chih-Yu Chiang ,&nbsp;Tzu-Fang Chang ,&nbsp;Zhao-Yu Huang ,&nbsp;Yu-Rong Cheng ,&nbsp;Sheng-Cheng Tsai ,&nbsp;Tzu-En Yen ,&nbsp;Jih-Run Tsai ,&nbsp;Shin-Fa Lin","doi":"10.1016/j.asr.2025.07.034","DOIUrl":"10.1016/j.asr.2025.07.034","url":null,"abstract":"<div><div>The study primarily investigates the thermal transfer characteristics of an all-sky electrostatic analyzer in a vacuum environment that simulates lunar sunlit conditions. Finite element analysis (FEA) was utilized to assess the operating temperature of payloads in space conditions. The experimental setup included a vacuum chamber and an isothermal plate to simulate the extreme temperature cycling of the space environment. By comparing the temperature measurements from the experiment with the results of the FEA, the reliability of the established FEA model in this study was verified. The study explores heat transfer behavior of the payload under the extreme temperature conditions of the lunar surface to determine the suitable operating temperature range and optimal landing latitude for the payload.</div><div>The results indicate that, under the current system design, when the ambient temperature is below −50 °C, the thermal energy generated by the operating mode and the heating plate is insufficient to maintain the equipment at a survivable temperature. Furthermore, under a 60 °C ambient temperature, the maximum temperature of the electronic system reaches 67.9 °C, approaching the maximum critical temperature that electronic components can withstand. Therefore, it is estimated that the payload can operate during dawn or dusk at latitudes between 0° and 60° on the lunar surface. In regions with latitudes between 60° and 75°, the payload can operate throughout the lunar day. However, at latitudes above 75°, the high daytime temperatures restrict its operation to short periods around dawn or dusk on the lunar surface.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4647-4662"},"PeriodicalIF":2.8,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145099428","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 the Performance of International Reference Ionosphere Models 2016 and 2020 in Predicting TEC in the Low-Latitude Ionosphere over Africa and South America","authors":"Geoffrey Cele ,&nbsp;Geoffrey Andima ,&nbsp;Valence Habyarimana ,&nbsp;Edward Jurua ,&nbsp;Oyirwoth Patrick Abedigamba","doi":"10.1016/j.asr.2025.07.032","DOIUrl":"10.1016/j.asr.2025.07.032","url":null,"abstract":"<div><div>The sparse distribution of Global Navigation Satellite System (GNSS) receivers in low-latitude region has hindered continuous monitoring of the ionosphere. To address this challenge, ionospheric models such as the International Reference Ionosphere (IRI) are often used. This study compares the performance of IRI-2020 and its predecessor (IRI-2016) with the Global Positioning System (GPS) observations over African and South American low-latitude regions during quiet conditions. The GPS Vertical Total Electron Content (VTEC) measurements from Addis Ababa (Geog. 38.77°E, 9.04°N), Sao Luis (Geog. −44.21°E, −2.59°N), Malindi (Geog. 40.19°E, −3.00°N), Libreville (Geog. 9.67°E, 0.35°N), Brasilia (Geog. −47.88°E, −15.95°N) and Cacoheira Paulista (Geog. −45.00°E, −22.68°N) stations for the high, moderate and low solar activity years 2014, 2016 and 2018 were compared with IRI-derived VTEC values. To objectively assess the model accuracy, the Mean Absolute Percentage Error (MAPE) and Normalized Root Mean Squared Error (NRMSE) metrics were employed, offering intuitive and reliable benchmarks for quantifying the model discrepancies. The monthly performance indicates that IRI-2020 and its predecessor significantly underestimate VTEC over Addis Ababa, yet slightly overestimate it over Libreville and Cacoheira Paulista across all studied years. Seasonal analysis reveals the largest discrepancies at the Equatorial Ionisation Anomaly (EIA) trough and Southern crest during solstice seasons. An evaluation of the latitudinal performance of IRI-2016 and IRI-2020 highlights better accuracy over the EIA trough. Furthermore, longitudinal assessment shows superior performance of both models at Libreville station, with IRI-2020 and IRI-2016 achieving notably low annual MAPE (aMAPE) values of <span><math><mrow><mo>⩽</mo><mn>43.3</mn><mspace></mspace><mo>%</mo></mrow></math></span> and <span><math><mrow><mo>⩽</mo><mn>36.3</mn><mspace></mspace><mo>%</mo></mrow></math></span>, respectively. Comparative analysis based on NRMSE shows IRI-2020’s improvement of <span><math><mrow><mo>∼</mo><mn>1</mn><mo>-</mo><mn>7</mn><mspace></mspace><mo>%</mo></mrow></math></span> at the dip equator, while its performance declines by <span><math><mrow><mo>∼</mo><mn>2</mn><mo>-</mo><mn>9</mn><mspace></mspace><mo>%</mo></mrow></math></span> at the EIA Southern crest. This study reveals significant discrepancies in the performance of IRI-2020 model over Africa and South America low-latitude, emphasizing the need for continuous model improvement.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 8","pages":"Pages 4525-4538"},"PeriodicalIF":2.8,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145098842","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}