Advances in Space Research最新文献

{"title":"An empirical model of the thermospheric winds based on ICON/MIGHTI observations","authors":"Rongjin Du ,&nbsp;Ruilong Zhang ,&nbsp;Libo Liu ,&nbsp;Wendong Liu ,&nbsp;Wenbo Li ,&nbsp;Yuyan Yang ,&nbsp;Han Ma ,&nbsp;Huijun Le ,&nbsp;Yiding Chen","doi":"10.1016/j.asr.2024.12.018","DOIUrl":"10.1016/j.asr.2024.12.018","url":null,"abstract":"<div><div>It is crucial to accurately reproduce the climatological features of the thermospheric neutral winds. We used the 2020–2022 data of the Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) on the Ionospheric Connection Explorer (ICON) to develop an empirical model of thermospheric winds with the methods of the Non-Uniform Rational B-Spline and harmonic fittings (NURBS-Harmonic model). The NURBS-Harmonic model exhibits good adaptability for winds in every season with longitude, latitude, local time, and altitude. Over 70 % of the NURBS-Harmonic data are present with errors within 15 m/s, showing a better performance than the Horizontal Wind Model (HWM14). The percentage of HMW14 data errors within 15 m/s is about 40 %. The NURBS-Harmonic effectively captures the spatial structure of the wind fields and exhibits seasonal variations well. At 250 km, zonal winds in the low and middle latitudes at 12 LT exhibit a wavenumber-3 (WN3) structure in all the seasons, while they display a slight wavenumber-4 (WN4) longitude structure trend during June Solstice and September Equinox. Meridional winds at the same altitude show a distinct WN4 structure in every season. Different from the HWM14, which only includes migrating tides, the NURBS-Harmonic model also considers non-migrating tidal components. To validate the significance of non-migrating tides, we conducted a wave analysis on meridional winds at 250 km in September Equinox near the equator where non-migrating tides are relatively important. The analysis indicates that the amplitudes of the predominant non-migrating tidal components (SE2, DW2, and D0) are nearly equal and about 40 % of the dominant migrating tidal component DW1. This suggests that the non-migrating tidal components can contribute significantly to the overall wind field variability and should not be overlooked. In addition, the extensive height coverage from 91 km to 300 km of the MIGHTI data enables the model to provide precise altitude information. The zonal WN4 structure of zonal winds is most prominent in the altitude ranges of 100–250 km at low latitudes in the Northern Hemisphere during June Solstice and September Equinox. The model accurately reflects the phases variations of the winds at various altitudes. The phases of WN3 and WN4 at 110 km are opposite to those at 150 km, existing in all seasons. This may partially explain previous reports that the topside ionosphere equatorial vertical plasma drift is positively correlated with the zonal winds at 110 km and inversely correlated with those at 150 km.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3730-3742"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403031","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":"Investigation of equatorial plasma bubble irregularities under quiet and disturbed geomagnetic conditions over the East African longitudinal sector in 2015","authors":"Zerihun Alemu ,&nbsp;Tsegaye Kassa","doi":"10.1016/j.asr.2024.12.012","DOIUrl":"10.1016/j.asr.2024.12.012","url":null,"abstract":"<div><div>In this paper, we investigated the behavior of equatorial plasma bubble irregularities under quiet and disturbed geomagnetic conditions in the year 2015. Total Electron Content (TEC) data was obtained from four Global Navigation Satellite System (GNSS) receivers situated at Addis Ababa (ADIS), Bahir Dar (BDMT), ASAB (ASAB), and Debark (DEBK). We used Rate of TEC change index (ROTI) to describe ionospheric irregularities associated with plasma bubbles. The monthly occurrence rates (MOR) is obtained to be higher in equinoctial and lower in solstitial months at all stations. Moreover, the seasonal occurrence rates of plasma bubbles (SOR) show equinoctial and solstitial asymmetries. The seasonal occurrence rate in March equinox is higher than that of the September equinox during both quiet and disturbed geomagnetic conditions. Similarly, higher occurrence rate is observed in June than December solstice in quiet geomagnetic conditions. We have also investigated that the occurrence rate of plasma bubble is higher in geomagnetic quiet conditions than disturbed conditions at all stations. Moreover, there is also excellent correlation with high degree of significance between the monthly occurrence rates of plasma bubbles and the monthly mean F10.7 index and sunspot number at all stations. The occurrence times of plasma bubbles are almost similar in the four stations and most of the irregularities (around 95 <span><math><mrow><mo>%</mo></mrow></math></span>of the total irregularities) are observed in times between postsunset and midnight hours. The daily, monthly, and seasonal variations of ROTI also demonstrate similarity with the variation of the occurrence rates of plasma bubbles.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3671-3691"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403149","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":"The path-tracing simulation of light-field camera system: SurfCam/GrainCams for lunar surface exploration","authors":"Minbae Kim ,&nbsp;Minsup Jeong ,&nbsp;Mingyeong Lee ,&nbsp;Jihun Kim ,&nbsp;Young-Jun Choi ,&nbsp;Sungsoo S. Kim ,&nbsp;Hae-Gon Jeon ,&nbsp;Jisu Shin","doi":"10.1016/j.asr.2024.12.029","DOIUrl":"10.1016/j.asr.2024.12.029","url":null,"abstract":"<div><div>The SurfCam is being developed to understand the microscopic lunar surface structures known as the fairy castle structure, composed of grains with an average size of a few tens of microns. It is designed as a microscopic light-field camera (LFC) and is one of the camera instrument packages in GrainCams, a candidate payload for NASA’s Commercial Lunar Payload Services (NASA/CLPS). The light-field camera system allows for obtaining depth maps and 3D images of lunar surface structures on a scale of tens of microns by capturing a 4D light field. This camera system can be achieved by adding a microlens array (MLA) between the main optics and the sensor in a typical camera system. The Cycles render engine, a physically-based path-tracing (one of the ray-tracing types) renderer of Blender 3D software, helps to simulate realistic light-field images. We performed path-tracing simulations by configuring SurfCam’s optics and creating test objects to confirm depth estimation results in Blender 3D. In this study, we present the results of simulated images and analyze them based on the current design of the SurfCam.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 4050-4060"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402760","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":"Modified Alfvén waves of multi-ion species in the upper ionosphere of Mars","authors":"A.A. Bakr ,&nbsp;W.M. Moslem ,&nbsp;M. El-Metwally ,&nbsp;I.S. Elkamash","doi":"10.1016/j.asr.2024.12.015","DOIUrl":"10.1016/j.asr.2024.12.015","url":null,"abstract":"<div><div>Cold-modified Alfvén waves of multi-ion species propagating perpendicular to an ambient magnetic field have been investigated. We derive the linear dispersion relation for any number of species. In addition to the conduction current density, we consider the displacement current density. The derived dispersion relation suggests a magnetized plasma mode to propagate at the long-wavelength for every ion species. At the short-wavelength, the propagating mode for every ion species saturates at a resonance frequency equal to the cyclotron frequency of that ion. The Alfvén wave mode is shown to be the long-wavelength mode for the heaviest ion species, while the Whistler wave mode corresponds to the less massive ion species. It is found that the displacement current density excites another mode to exist in the electron fluid, which is known as the magnetized plasma analog of Langmuir mode. The consequences of varying the magnetic field, and the total plasma density and the mixing ratios of the ion species on the resonance, the cutoff frequencies, and the propagating modes are inspected. Investigation of this model on the observed linear ULF waves on the upper ionosphere of Mars is introduced.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 4099-4125"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402780","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":"Optimization of low-earth orbit density model based on support vector regression","authors":"Yao Wu,&nbsp;Junyu Chen,&nbsp;Chusen Lin,&nbsp;Zijie Li","doi":"10.1016/j.asr.2024.11.062","DOIUrl":"10.1016/j.asr.2024.11.062","url":null,"abstract":"<div><div>With the increasing number of satellites being launched and the accumulation of space debris, the atmospheric density in low Earth orbit is becoming increasingly important for precise orbit determination. This study aims to optimize the accuracy of atmospheric density prediction in low Earth orbit using support vector regression (SVR). The SVR-based model uses high-resolution geomagnetic data and CHAMP satellite observation data to optimize the density of JB2008. Tests were conducted under various solar activity conditions and different periods. The results show that SVR improves the RMSE of the original model, the improvement rate of RMSE is between 10 % and 40 % and directly reduce MAPE to 2 %∼25 %.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3601-3613"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403144","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":"Neural network model for predicting the horizontal component of Earth’s magnetic field (H) over Indian equatorial region during quiet and disturbed periods","authors":"S. Sajith Babu ,&nbsp;K. Unnikrishnan ,&nbsp;Sreekumar Haridas","doi":"10.1016/j.asr.2024.12.014","DOIUrl":"10.1016/j.asr.2024.12.014","url":null,"abstract":"<div><div>Artificial Neural Networks (ANNs) have proven successful in forecasting various magnetospheric and ionospheric parameters. The design of an artificial neural network (ANN) for predicting the horizontal component of Earth’s magnetic field (H) and range in H (ΔH), over Indian equatorial region, for both quiet and disturbed conditions of 23^rd solar cycle (August 1996 to December 2007) is discussed in this work. Ground magnetometer data from the stations Tirunelveli [TIR], Pondicherry [PND], Alibag [ABG], and Ujjain [UJJ] are used for training the network. Datasets from the stations Trivandrum [TRD] and Nagpur [NGP] are used for the testing procedure. The data used in this work covers the 23^rd solar cycle and it include low, moderate and high solar activity levels of both the ascending and descending phases of the solar cycle. Two sets of input parameters are used as inputs to the ANN. The first set, namely the geophysical parameters, are temporally or spatially related to the training stations. These consists of Latitude, Longitude, day of the year (DOY), local time (LT) magnetic dip angle (Inclination, I) and angle of declination (magnetic declination, D). The second set of inputs, that are driven by solar activity and affect the different stations uniformly, are Solar Flux (F10.7), Ap Index, IMF Bz, and Ion Number Density. Using these input parameters a neural network model (CCNRM) with 10 hidden neurons and 600 iterations is developed. It is found that the prediction accuracy of the model is better while training with original time series rather than the detrended time series. Here we present the prediction of H and ΔH during the quiet, disturbed geomagnetic conditions (minor storms (Dst minimum ≤ −50 nT), major storms (Dst minimum ≤ −100 nT)) along with its seasonal variation. Different datasets of the 23^rd solar cycle including low, moderate and high solar activity levels from both the ascending and descending phases of the solar cycle are faithfully reproduced by the model. The model successfully predicted the diurnal variation, seasonal variation, minor storms and major storms within the average error limits of 11 nT, 7 nT, 27 nT and 36 nT respectively during the testing process.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3705-3729"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403151","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":"Real-time critical safety curve and predictive control based trajectory planning for complex shaped rotating spacecraft proximity","authors":"Jingxian Wang,&nbsp;Zhijun Chen,&nbsp;Rong Chen,&nbsp;Yong Zhao,&nbsp;Yuzhu Bai","doi":"10.1016/j.asr.2024.12.025","DOIUrl":"10.1016/j.asr.2024.12.025","url":null,"abstract":"<div><div>This paper presents a real-time trajectory planning and tracking control framework for a complex-shaped chaser to approach a rotating target with complex shapes. The framework is divided into two layers: trajectory planning and tracking control. Firstly, considering the complex shapes and relative attitude constraints of the target and chaser, a real-time critical safety curve (RT-CSC) is proposed as a collision avoidance constraint combined with the rotational motion of the target. Secondly, the multi-constraint improved disturbed fluid method (MCIDFM) is proposed. The flow field velocity is designed by considering proximity time optimization under boundary and chaser thruster performance constraints. Trajectory planning is achieved by making the flow field bypass the non-convex keep-out zone formed by the RT-CSC. Then, the tracking control is implemented using a model predictive control method and the closed-loop asymptotic stability is demonstrated. Simulation results demonstrate the proposed methods’ smoothness, safety, and strong approach capabilities. Rapidity and robustness are also reflected in simulation analysis.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3891-3913"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143402868","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":"Assessing the impact of the Hunga Tonga-Hunga Ha’apai volcanic eruption on the structure of the Brewer-Dobson circulation: Possible Implications","authors":"V. Veenus ,&nbsp;Siddarth Shankar Das","doi":"10.1016/j.asr.2024.11.075","DOIUrl":"10.1016/j.asr.2024.11.075","url":null,"abstract":"<div><div>The present study deals with the effect of Hunga Tonga-Hunga Ha’apai volcanic eruption on altering the structure of Brewer-Dobson circulation (BDC) that occurred on 15 January 2022. The strength of the stratospheric circulation declined during the Southern Hemispheric winter following the volcanic eruption. The eruption had substantial impacts on the stratospheric thermal structure and composition. The Eliassen-Palm flux divergence implies the wave breaking was nearly non-existent. Thus, the wave driven circulation’s strength was reduced following the injection of water vapor. The reduction in meridional transport was also reflected in the distribution of ozone in the Southern Hemisphere obtained from Aura Microwave Limb Sounder. An unprecedented deviation of ozone mixing ratio, with magnitude 0.55 ppmv, was observed following the eruption over the tropical stratosphere.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3311-3325"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403035","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":"Dust source dynamics in arid Iran: Examining the relationship between MODIS AOD and land surface characteristics in a dried catchment","authors":"Maliheh sadat Afzalizadeh ,&nbsp;Mozhgan Ahmadi Nadoushan ,&nbsp;Ahmad Jalalian ,&nbsp;Atefeh Chamani","doi":"10.1016/j.asr.2024.11.077","DOIUrl":"10.1016/j.asr.2024.11.077","url":null,"abstract":"<div><div>Dust sources are expanding unprecedentedly across the arid parts of Iran. To quantify this trend in the Kaftar Catchment in SW Iran (5,600 km²), the MODIS AOD product “Optical_Depth_047″, accessible through Google Earth Engine was utilized, as one of the moderate-resolution (1 km) aerosol data sources spanning from 2002 to 2023. The layers were preprocessed and averaged to derive annual mean data (AM-AOD), and its accuracy was verified using reference dust data collected from 24 stations in 2022 (correlation coefficient = 0.565; p-value &lt; 0.01). The Mann-Kendall trend test confirmed a statistically significant upward trend in AOD values. A positive Sen’s slope predominated for the majority of the AM-AOD pixels. The Generalized Additive Model (mean R² = 0.753) successfully predicted AM-AOD values at each pixel for the year 2035. According to the Landsat 8-derived LULC map of the region (Kappa = 83.56), the wetland area is projected to experience the highest increase in AM-AOD in 2035, reaching 0.43 ± 0.06, while rangelands are expected to observe the lowest increment at 0.17 ± 0.07. Our study underscores the urgency of rehabilitating the Kaftar Wetland, promoting low-water crops, and improving ecosystem resilience in rangelands.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3326-3334"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403036","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":"Geospatial and NDBI approaches for the Musi River basin morphometric studies in the metropolitan urban Cities of India","authors":"Pradeep Kumar Badapalli ,&nbsp;Sakram Gugulothu ,&nbsp;Anusha Boya Nakkala","doi":"10.1016/j.asr.2024.12.010","DOIUrl":"10.1016/j.asr.2024.12.010","url":null,"abstract":"<div><div>This study aims to advance the understanding of hydrological dynamics and geomorphological characteristics of the Musi River Basin through the novel application of Remote Sensing (RS) and Geographical Information System (GIS)-based morphometric analysis across three delineated sub-basins (SB-1, SB-2, SB-3). By examining parameters such as stream order, bifurcation ratio, drainage density, and land cover changes using the Normalized Difference Built-up Index (NDBI), the study provides a comprehensive overview of the basin’s surface hydrology and urbanization impact. Key findings reveal low surface runoff and high permeability, supported by low drainage density (0.64 km/km2) and stream frequency (0.48 streams/km2). SB-3′s elevated bifurcation ratio (5.0) highlights substantial structural control, contrasting with moderate bifurcation ratios in SB-1 and SB-2. Hypsometric analysis indicates a transition from youthful to mature phases across the basin, with SB-3′s ruggedness values reflecting moderate erosion. A 21-year land cover analysis (2000–2021) based on NDBI highlights notable changes: water bodies (2.67 %), moisture soils (5.04 %), built-up lands (3.10 %), and vegetation (2.74 %) have all increased, while fallow lands/wastelands decreased by 13.54 %. The urban expansion, driven by rapid population growth, underscores pressing ecosystem challenges. Validation of the land cover analysis yielded a robust AUC score of 0.840, affirming the reliability of the NDBI-based classification. This research showcases the efficacy of DEM-based morphometric methods for precise catchment delineation and stream order classification, providing critical insights for effective water resource management and watershed planning in the Musi River Basin.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 4","pages":"Pages 3375-3396"},"PeriodicalIF":2.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403041","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}