Advances in Space Research最新文献

{"title":"Investigation of fair weather atmospheric electric field variations from the Eastern Himalaya Syntaxis in North-East region of India","authors":"Subrata Kundu ,&nbsp;Mala S. Bagiya ,&nbsp;S. Gurubaran ,&nbsp;Srinivas Nayak ,&nbsp;N.K. Hazarika ,&nbsp;A.P. Dimri","doi":"10.1016/j.asr.2025.05.006","DOIUrl":"10.1016/j.asr.2025.05.006","url":null,"abstract":"<div><div>We examine here variations of fair weather atmospheric electric field (AEF) referred to as potential gradient (PG), recorded at Namsai (27.69°N, 95.85°E) in the Eastern Himalaya Syntaxis. The work is based on data collected over 99 fair weather days spanning from November 2017 to April 2019. We aim to assess the general characteristics of PG over Namsai and further explore the possibility of deciphering seismic-associated signatures in PG. Our analysis indicates that the mean diurnal variation of fair weather PG peaks at ∼14:00 UT. Seasonal analysis shows that PG values maximized during the winter, followed by the equinox and summer. These characteristics of PG are explained in terms of variations in meteorological parameters, air pollution level, and geographical location of Namsai, i.e., the Brahmaputra river nearby and the deep forest surrounding it. We further report a significant variation in PG before the Mw 6.4 earthquake on November 17, 2017, which occurred in a blind fault near the Main Central Thrust. PG showed a bay-shaped negative anomaly lasting ∼2 h, observed ∼7 h before the event. The anomaly exceeded the 2σ limit of mean fair weather PG. The earthquake day was devoid of any significant meteorological changes. It is suggested that the PG anomaly was associated with earthquake rather than local weather changes. This study not only provides better insights into the general variability of fair weather PG over this region but also highlights the importance of AEF measurements as a potential indicator of seismic events, sensing as precursory signals several hours ahead.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 985-997"},"PeriodicalIF":2.8,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471764","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":"Spectral mamba enhanced neighborhood attention network for aerial hyperspectral image classification","authors":"Chuanzhi Wang,&nbsp;Mingyun Lv,&nbsp;Jun Huang,&nbsp;Yongmei Wu,&nbsp;Ruiru Qin","doi":"10.1016/j.asr.2025.04.081","DOIUrl":"10.1016/j.asr.2025.04.081","url":null,"abstract":"<div><div>Hyperspectral images (HSIs) are celebrated for their rich spectral information, making them highly effective for precise land cover classification. Deep neural networks, such as vision transformers (ViTs) and state space models (Mamba), have made significant advancements in hyperspectral image classification (HSIC). However, ViTs are often limited by their quadratic computational complexity and a predominant focus on global information, which can hinder their ability to extract crucial local features essential for HSIC. While Mamba-based architectures offer linear computational complexity and impressive performance, they are constrained by their limited understanding of the spatial and spectral information in HSIs. To address these limitations, we propose a novel spectral Mamba-enhanced neighborhood attention (SMENA) hybrid network, designed to effectively leverage the strengths of various architectures. This network integrates a local spatial feature extraction (LSFE) module with a spectral Mamba (SpeM) specifically for HSIC. The bidirectional scanning mechanism in SpeM enhances its ability to capture discriminative spectral features, while the LSFE, composed of convolutional and neighborhood attention modules, hierarchically captures detailed local spatial features. Extensive experiments on four widely used public datasets demonstrate that our model achieves superior classification performance compared to other eight benchmark methods.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 633-649"},"PeriodicalIF":2.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471587","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":"A planetary landing trajectory planning method with the terrain hazard convex hull error model","authors":"Yanmin Jin,&nbsp;Jingyue Hu,&nbsp;Lizhou Sun,&nbsp;Zhenqing Xue,&nbsp;Xiaohua Tong,&nbsp;Huan Xie,&nbsp;Yongjiu Feng,&nbsp;Sicong Liu","doi":"10.1016/j.asr.2025.04.083","DOIUrl":"10.1016/j.asr.2025.04.083","url":null,"abstract":"<div><div>Landing trajectory planning is a critical aspect of extraterrestrial exploration missions, directly impacting the safety of the lander. A key requirement in this process is avoiding terrain hazards. However, inevitable errors in the detected positions of terrain hazards pose significant threats to landing safety. This study presents a landing trajectory planning method that accounts for the terrain hazards’ positional errors. First, a terrain hazard positional error modeling method is established by incorporating uncertainty into the convex hull model. Second, the concept of maximum collision probability is introduced to quantify collision risk based on the hazards’ positional error model. Finally, based on the maximum collision probability, a safe landing trajectory is generated using the artificial potential field. Simulation results show that the proposed method can realize safe landing trajectory planning despite hazards’ positional uncertainties.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 878-893"},"PeriodicalIF":2.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471758","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":"Monthly mean sea level variability in the eastern sub-basin of the Gulf of Cadiz from altimetry and coastal tide gauge data sets","authors":"Begoña Tejedor,&nbsp;Óscar Álvarez,&nbsp;Arena Martin-Olivo,&nbsp;Jesús Gómez-Enri","doi":"10.1016/j.asr.2025.05.001","DOIUrl":"10.1016/j.asr.2025.05.001","url":null,"abstract":"<div><div>In this work, the main forcing factors affecting the monthly mean sea level in the eastern sub-basin of the Gulf of Cadiz (south-western Iberian Peninsula) are analysed in detail. Monthly mean sea level (MMSL) anomaly time series (30 years:1993–2022) from altimetry and tide gauges are used for this purpose. Validation of altimeter monthly MSL using two tide gauges (Huelva and Bonanza) gives high correlation coefficients (&gt;0.85) and low RMSE (&lt;3.5 cm). The comparison against Huelva was performed in the period: 1997–2022 due to data unavailability. A good level of accuracy is also observed for all the altimeter grid points analysed in the study area. The different local hydrodynamic conditions in the location of the tide gauges explains the differences in the validation results of altimeter data. The atmospheric pressure explains more than 40 % of the variance in the monthly mean sea level, indicating that this forcing factor is the main contributor to the sea level variability in our study area on long (&gt;1 month) timescales. Taking into account the seasonal cycle, the variance ranges between 65 % (western sub-basin) and 74 % (eastern sub-basin). This percentage reaches up to 86–90 % of the variance considering the sea level trend. The isostatic assumption (−1 cm/hPa) is only valid on the western side of the sub-basin, reaching −1.3 cm/hPa on the eastern side with a marked E-W variation. For this reason, removing the atmospheric effect using inverse barometer correction can lead to misinterpretations of the contribution of this effect to the sea level variability. No significant differences were observed in the variability of the MMSL between coastal areas and the open ocean, while there was a slight spatial variation in the sea level trend, with minimum values in coastal areas close to the Strait of Gibraltar. Atmospheric pressure, although the main driver of MSL variability, does not affect the value of the sea level trend, but only reduces the uncertainty. This is also the case for the seasonal cycle.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 1","pages":"Pages 1-18"},"PeriodicalIF":2.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144222756","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":"Deep-auto-encoder neural-networks based attitude control allocation for over-actuated spacecraft","authors":"Yujie Lan,&nbsp;Zhen Chen,&nbsp;Xiaoyu Lang,&nbsp;Xiangdong Liu","doi":"10.1016/j.asr.2025.04.077","DOIUrl":"10.1016/j.asr.2025.04.077","url":null,"abstract":"<div><div>Modern spacecraft attitude control system mostly adopt over-actuated configuration to improve overall performance. It is necessary to consider reducing the energy consumption of the over-actuated system due to the limited on-board power supply. This paper proposes a deep-auto-encoder (DAE) neural-network-based control allocation method for spacecraft attitude control. It can achieve optimal energy consumption with high control allocation accuracy. The DAE network is trained with data generated by the dynamics of actuators. The decoder-part network is a fitting of actuators kinetics, and the encoder-part conducts control allocation. The optimization function of the network is the weighted sum of energy loss and control allocation error. Numerical examples show that the proposed DAE based control allocation method possesses good performance in torque distribution with optimal energy distribution.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 1137-1149"},"PeriodicalIF":2.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471681","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":"Geomorphological and mineralogical analysis of the lunar Robertson crater","authors":"Ashwani Raju ,&nbsp;Saraah Imran ,&nbsp;Jiwantika Kumari ,&nbsp;Ankit Kumar ,&nbsp;Ramesh P. Singh","doi":"10.1016/j.asr.2025.04.079","DOIUrl":"10.1016/j.asr.2025.04.079","url":null,"abstract":"<div><div>This study provides a comprehensive overview of the lunar Robertson crater of Copernican period located on the far side of the moon using multi-sensor satellite observations from combined Chandrayaan-I M3, LROC WAC Global Geomorphology and SELENE DTM mosaics. The analysis shows development of dynamic features, distribution of minerals, and topographic features during the crater formation. The crater preserves a complex geological evolution based on the mineralogical heterogeneity and distinct geomorphological features (such as accumulated melt flow at the crater floor, topographic undulations etc.) observed in a radial symmetry, which suggest formation through high energy impact processes. The detailed investigation of melt pool topography at the crater floor, highlights the formation and subsequent modifications of the transient cavity developed during simple to complex crater transition after the impact. The mineral species identified using the RELAB spectral library through the ‘spectral hourglass’ workflow show a distinct distribution, with Mg-spinel and olivine-rich lithologies concentrated in the central peak, while pyroxenes dominate the crater floor and surrounding rock rings. This pattern shows a complex mineral distribution, likely excavated from different depths as a result of the impact event. The dynamics of crater formation show a diameter respectively of 4.36 km and 5.73 km, assumed for chondrite and iron projectiles. Besides, CSFD measurements represent an absolute age of about 82 ± 4 Ma based on the 121 isochron fits to the differential data of post-impact craters that suggests recent resurfacing consistent with melt flow during the terminal stages of impact dynamics.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 1172-1195"},"PeriodicalIF":2.8,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471621","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":"Advanced modeling of forest fire susceptibility and sensitivity analysis using hyperparameter-tuned deep learning techniques in the Rajouri district, Jammu and Kashmir","authors":"Lucky Sharma ,&nbsp;Mohd Rihan ,&nbsp;Narendra Kumar Rana ,&nbsp;Shiva Kant Dube ,&nbsp;Md. Sarfaraz Asgher","doi":"10.1016/j.asr.2025.04.076","DOIUrl":"10.1016/j.asr.2025.04.076","url":null,"abstract":"<div><div>Forest resources are crucial for sustaining the global population, regulating climate services, and maintaining overall ecological balance. However, forest fires are causing a significant loss of forest cover worldwide. In this context, advanced deep learning techniques, which are novel to date, have been utilized to prepare forest fire susceptibility mapping. The present study aimed to predict forest fire susceptibility using three hyper-tuned techniques: deep neural network (DNN), elman neural network (ENN), and convolutional neural network (CNN). To identify the importance of influencing factors, sensitivity analysis was conducted using the DNN. The forest fire susceptibility map (FFSM) was categorized into five susceptibility zones: very high, high, moderate, low, and very low. Results indicated that the southern and southeastern parts of the study area are most prone to forest fires. The proportion of high susceptibility zone in the study area was found to be 34% for DNN, 37% for ENN, and 30% for CNN. Among all the models, DNN outperformed the others, achieving the highest accuracy of 0.8925, compared to ENN (0.8825) and CNN (0.87). Sensitivity analysis further revealed that evapotranspiration, temperature, land surface temperature (LST), distance to roads, aridity, and elevation were the most influential factors contributing to forest fires in the region. This study demonstrates an advanced and globally relevant approach to forest fire susceptibility analysis. The findings may be crucial for stakeholders and policymakers to make informed decisions regarding effective forest fire management and to protect vulnerable communities from unexpected losses.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 614-632"},"PeriodicalIF":2.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471763","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":"Advanced Framework for Securing Satellite Imagery in Computationally Constrained-Environments","authors":"Salah-Eddine Tbahriti ,&nbsp;Abdelmadjid Saad ,&nbsp;Nabil Boughanmi","doi":"10.1016/j.asr.2025.04.074","DOIUrl":"10.1016/j.asr.2025.04.074","url":null,"abstract":"<div><div>Ensuring the security of satellite imagery has become increasingly critical with the growing disposition of Small Earth Observation Satellites, heightened by an evolving landscape of security issues. The satellite images often contain sensitive information, such as data essential for national safety or critical structure monitoring, highlighting the urgent need for effective protection mechanisms. However, the resource-constrained nature of these satellites – designed to deliver cost-effective and scalable data collection solutions – poses significant challenges in providing robust and efficient security solutions. The contribution of this paper is threefold. We address these challenges by first introducing a security model that semantically and formally specifies the security requirements for satellite imagery, considering both the sensitivity of the data and the operational constraints of the system. Then, we introduce a secure encryption protocol that ranks image security needs based on their classification and importance. The proposed protocol leverages two lightweight encryption algorithms we design, specifically to balance robust protection with optimized computational effectiveness, ensuring applicability to resource-constrained environments. The efficiency of our protection approach is validated through an extensive set of experiments, demonstrating its ability to meet the unique demands of satellite operations while maintaining cryptographic security standards.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 1116-1136"},"PeriodicalIF":2.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471680","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":"Autonomous interplanetary navigation using full-disk solar imaging","authors":"V. Franzese","doi":"10.1016/j.asr.2025.04.073","DOIUrl":"10.1016/j.asr.2025.04.073","url":null,"abstract":"<div><div>This paper introduces a novel method for autonomous interplanetary navigation leveraging full-disk solar imaging. The growing number of small satellites in simultaneous deep-space missions has determined congestion issues in ground stations, demanding alternatives methods to radiometric tracking to be developed for orbit determination. The navigation approach of this study utilizes the apparent size of the Sun captured through white-light imaging to estimate the spacecraft’s distance from the Sun, combined with centroid information for determining the relative position vector, provided spacecraft attitude is known. The image processing pipeline employed to extract the solar diameter and centroid from images, as well as the navigation filter formulation to sequentially estimate the spacecraft’s orbit in deep space, are presented in this paper. The methodology has been tested along a representative interplanetary trajectory, demonstrating promising performance in both position and velocity estimates, allowing the tracking of a reference orbit in deep space onboard satellites. This method may prove useful for initial orbit determination, orbit recovery, contingency, or as back-up to radiometric tracking, thus off-loading ground stations and shifting navigation routines onboard satellites.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 865-877"},"PeriodicalIF":2.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471800","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":"Dynamics of EPBs and MSTIDs interaction during the post-midnight sector over the Indian low-latitude region","authors":"O.B. Gurav ,&nbsp;R.N. Ghodpage ,&nbsp;A. Taori ,&nbsp;S. Sripathi ,&nbsp;S.D. Karpe ,&nbsp;M.K. Patil ,&nbsp;A.P. Dimri","doi":"10.1016/j.asr.2025.04.075","DOIUrl":"10.1016/j.asr.2025.04.075","url":null,"abstract":"<div><div>We present evidence of the merging of Equatorial Plasma Bubbles (EPBs) with Medium-Scale Travelling Ionospheric Disturbances (MSTIDs) during the post-midnight sector over the Indian region, observed on the night of 28th January 2011, a typical spread F event. The wavefront of the MSTIDs was aligned from northwest to southeast, propagating southwestward. In this study, we analyze airglow data from OI 630.0 nm emission recorded by an all-sky imager (ASI) located at Kolhapur (16.8°N, 74.2°E). The onset of EPBs was observed around 13:30 UT. Notably, eastward-moving EPBs began to merge with the dark wavefronts of MSTIDs around 19:50 UT, with the process completing by 21:45 UT. During this merging process, the drift velocity of EPBs decreased from 100 m/s to 50 m/s which later merged with the dark fronts of MSTIDs, as noted in OI 630.0 nm images. This interaction resulted in structural changes to the eastward drifting EPBs. The electrodynamics associated with this novel event is elaborated in this paper.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"76 2","pages":"Pages 926-938"},"PeriodicalIF":2.8,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471703","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}