Advances in Space Research最新文献

{"title":"Analyzing land use land cover dynamics under rapid urbanization using multi-temporal satellite imageries and geospatial technology for Jamshedpur city in India","authors":"Pratik Deb ,&nbsp;Ranjeet K. Jha ,&nbsp;Navneet Kumar ,&nbsp;Mukesh Kumar Vishal ,&nbsp;Dericks Praise Shukla ,&nbsp;Prasanta K. Kalita ,&nbsp;Laishram Kanta Singh","doi":"10.1016/j.asr.2024.11.059","DOIUrl":"10.1016/j.asr.2024.11.059","url":null,"abstract":"<div><div>Land use land cover (LULC) is considered as one of the most important driving factors behind the global environmental change. The rapid changes in the LULC patterns than ever before, mostly in developing countries, are frequently considered by widespread urban sprawling, land degradation, reduction of agricultural land, and alteration into other land use categories, resulting in enormous costs to the environment. Using a combined remote sensing and GIS technique, this study investigates the spatial urban expansion and its impacts on other LULC categories from 1987 to 2016 in Jamshedpur, India, based on the acquired multispectral satellite imageries, field observations, and demographic data. A visual-based image analysis technique was employed to develop a LULC map for the period of 1987, 2004, and 2016, and the precision of the maps was determined by overall accuracy and kappa statistic methods. The compact urbanization over the city was quantified using both landscape metrics and Shannon’s entropy method. The results of the change detection showed that the built-up area has experienced more than fifty percent growth during the 1987 – 2016 period. It is the main driving factor behind the reduction in the area of other land use categories: agricultural land (−87.12 %), vegetation (−67.51 %), riverbed (−46.25 %), and forest cover (−27.92 %). Although barren land and fallow land were the most dynamic land use categories, it increased by 281.84 % and 119.66 %, respectively. The change matrix between 1987 and 2016, indicated the maximum transformation (+455.23 %) of fallow land to settlement. Geographically, there is a continuous growth in the built-up area from the city center to the fringes as a result of suburbanization. The values of Shannon’s entropy during 1987, 2004, and 2016 were 1.11, 1.19, and 1.57, respectively. The demographic analysis shows that the annual population for the period of 1971–1981, 1981–1991, 1991–2001, and 2001–2011 has changed by + 3.89 %, +2.09 %, +2.91 %, and + 1.95 % per year, respectively. The population growth, aggregated settlements and land scarceness in Jamshedpur were found to be the key reasons behind the urban growth and development. This study emphasizes the critical need for sustainable urban development practices and robust land use strategies to alleviate the environmental impacts of rapid urban expansion. It will lay a valuable groundwork for future research focused on integrating land use management with urban growth frameworks to achieve balanced and resilient development in Jamshedpur.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2810-2825"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171076","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":"Did the “Tauktae” cyclone impact the upper atmosphere through traveling ionospheric disturbances? A case study over the Arabian Sea using measurements from InSWIM network stations","authors":"Swati Chowdhury,&nbsp;R.K. Choudhary,&nbsp;D. Bala Subrahamanyam","doi":"10.1016/j.asr.2024.11.012","DOIUrl":"10.1016/j.asr.2024.11.012","url":null,"abstract":"<div><div>In May 2021, the Arabian Sea experienced Cyclone Tauktae, the first pre-monsoon tropical cyclone of the year and the fifth strongest ever recorded over the Arabian Sea. It originated from a depression near the Lakshadweep Islands on May 14, 2021, rapidly intensified into an extremely severe cyclonic storm by May 17, 2021, and made landfall on May 19, 2021. During its passage, the Arabian Sea experienced highly convective and disturbed conditions. We used this powerful tropical cyclone amid geomagnetically quiet conditions to explore its potential effects on the ionospheric region. Using the COSMO regional atmospheric model, we simulated the movement of Cyclone Tauktae and lower atmospheric conditions. Additionally, we utilized ionospheric data from Kavaratti, GMRT, and Pune to investigate the possible impacts of cyclonic storms on the upper atmosphere. These three stations were selected from the Indian Network for Space Weather Impact Monitoring (InSWIM) network. Analysis of the Vertical Total Electron Content (VTEC) measurements from May 14 to 18, 2021 (cyclone-influenced days) and May 05, 2021 (non-cyclone day) revealed a prominent presence of Traveling Ionospheric Disturbances (TIDs) during the cyclone days. Spectral analysis of TEC data showed significant TID spectral power enhancements (<span><math><mrow><mo>∼</mo></mrow></math></span> 5) on May 16–17, 2021, at Pune and GMRT, with wave velocities ranging from 100 to 125 m/s. As the geomagnetic conditions remained quiet during both the non-cyclone day and the cyclone-influenced days, the observed TIDs are attributed to the forcing from the lower atmosphere, eventually associated with the presence of Cyclone Tauktae.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 3159-3178"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171236","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":"Evaluation of the Galileo high-accuracy service SSR product quality and PPP performance","authors":"Meng Gao ,&nbsp;Ziheng Meng ,&nbsp;Huizhong Zhu ,&nbsp;Tianjun Liu ,&nbsp;Aigong Xu ,&nbsp;Chunbo Tan ,&nbsp;Zhihua Cao","doi":"10.1016/j.asr.2024.11.021","DOIUrl":"10.1016/j.asr.2024.11.021","url":null,"abstract":"<div><div>The Galileo navigation satellite system (Galileo) High-Accuracy Service (HAS) is a global navigation satellite system (GNSS) augmentation service proposed by the European Union that providing free of charge orbit, clock and pseudo-range biases corrections to users around the world through E6 signals and by terrestrial means (Internet). However, there has been limited research on the performance of the HAS State Space Representation (SSR) products broadcast by the Galileo Service Centre (GSC). However, there has been limited research on the performance of the HAS SSR products broadcast by the GSC. This study uses BNC software to receive HAS SSR products and compares them with SSR products from three analysis centers with relatively high accuracy: Wuhan University (WHU), the Chinese Academy of Sciences (CAS), and Centre National d’Etudes Spatiales (CNES), and analyzes them in terms of orbit, clock error, and positioning performance. In addition, Galileo HAS as a satellite-based augmentation service, this study chooses BDS PPP B2b, which is also a satellite-based augmentation service, as a comparison to analyze the performance of the HAS augmentation service. The results indicate that the signal-in-space ranging error (SISRE) values for Global Positioning System (GPS) and Galileo corrected by HAS are 7.26 cm and 5.79 cm, respectively. The average convergence times for the GPS + Galileo combination in the static and kinematic modes are 9.4 min and 14.1 min, respectively. Moreover, in kinematic mode, single-system positioning achieved an accuracy of better than 12 cm in the E direction and better than 17 cm in the U direction. In comparison with BeiDou navigation satellite system (BDS) PPP-B2b, the average convergence time of HAS under static mode is 16 min, while that of B2b requires 19 min. Meanwhile, the positioning accuracy of B2b products in the three directions is improved by more than 1 cm compared with that of HAS. The convergence time of HAS in kinematic mode is 12 min shorter than that of B2b.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2669-2682"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171695","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":"Integrating plasmasphere, ionosphere and thermosphere observations and models into a standardised open access research environment: The PITHIA-NRF international project","authors":"Anna Belehaki ,&nbsp;Ingemar Häggström ,&nbsp;Tamas Kiss ,&nbsp;Ivan Galkin ,&nbsp;Anders Tjulin ,&nbsp;Mária Miháliková ,&nbsp;Carl-Fredrik Enell ,&nbsp;Gabriel Pierantoni ,&nbsp;Yin Chen ,&nbsp;Gergely Sipos ,&nbsp;Sean Bruinsma ,&nbsp;Viviane Pierrard ,&nbsp;David Altadill ,&nbsp;Antoni Segarra ,&nbsp;Víctor Navas-Portella ,&nbsp;Emanuele Pica ,&nbsp;Luca Spogli ,&nbsp;Lucilla Alfonsi ,&nbsp;Claudio Cesaroni ,&nbsp;Vicenzo Romano ,&nbsp;Jurgen Watermann","doi":"10.1016/j.asr.2024.11.065","DOIUrl":"10.1016/j.asr.2024.11.065","url":null,"abstract":"<div><div>The PITHIA-NRF project “Plasmasphere Ionosphere Thermosphere Integrated Research Environment and Access services: a Network of Research Facilities” aims at building a European distributed network that integrates observations from space and ground, data processing tools and models to support scientific research on the Plasmasphere-Ionosphere-Thermosphere system. PITHIA-NRF is designed to provide formalised open access to experimental facilities, data and models, standardised data products, and training services. Participating organisations that operate these facilities, formed twelve nodes in eleven European countries. These nodes work on optimising their observing facilities and offer <em>trans</em>-national access to scientists and engineers. The PITHIA-NRF e-Science Centre is a core element of the project. Its design and evolution are controlled by a systematic ontology which governs the collection of scientific observations and research models, jointly termed data collections, which are registered with the e-Science Centre. Several tens of data collections are being registered. Data collection registrations adhere to FAIR principles and transparent quality measures to a large extent. The e-Science Centre facilitates the execution of research projects proposed by researchers from inside and outside the PITHIA-NRF consortium which require <em>trans</em>-national access to and understanding of data collections (observations and models) residing at one or several PITHIA-NRF nodes. Upon completion of the project a comprehensive collection of observations and models will have been gathered by the e-Science Centre for the benefit of efficient scientific research which relies on Europe-wide collaboration.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 3082-3114"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172015","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":"A note on the computation of multi-revolution NRHO under the ephemeris model","authors":"Lei Liu,&nbsp;Yong Liu","doi":"10.1016/j.asr.2024.11.001","DOIUrl":"10.1016/j.asr.2024.11.001","url":null,"abstract":"<div><div>Near Rectilinear Halo Orbits (NRHOs) are vital to manned lunar and deep space exploration, which nowadays are of great interest for different space agencies and in particular with regard to the future space station. However, the required computation of multi-revolution NRHO under the ephemeris model is difficult, especially for the NRHOs with low periapsis relative to the secondary body. This paper explores this issue from the perspective of multiple shooting, first analyzing the influence of the state transition matrices by means of their condition number and then, focusing on a good selection of trajectory segments with suitable patch points. The methodology considerably improves the convergence and the computation under the ephemeris model. Numerical simulations show that at least 30 revolutions can be achieved for NRHOs with perilune radius of less than 12,000 km around L1 or period less than 8.8 days around L2; meanwhile, the number of segments used can be as low as 2 for each single revolution. As for the position of patch points, the first and last points of each revolution should be apart from the Moon, and the distance can be reduced only when the number of segments increases. The proposed method requires no dedicated optimization algorithm or commercial software to produce the multi-revolution NRHOs.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2889-2907"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172105","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":"Retrieving hourly aerosol optical depth for geostationary satellite FY-4B/AGRI by surface-related dynamic spectral reflectance ratio method","authors":"Wei Wang,&nbsp;Nan Wang,&nbsp;Biyan Chen","doi":"10.1016/j.asr.2024.10.057","DOIUrl":"10.1016/j.asr.2024.10.057","url":null,"abstract":"<div><div>The Advanced Geostationary Radiation Imager (AGRI) on board Fengyun-4B (FY-4B) has been found to have significant advantages in aerosol dynamic monitoring. This study proposed a surface-related dynamic spectral reflectance ratio (SDSRR) method for FY-4B/AGRI to solve the problem of inaccurate surface reflectance estimation in Aerosol Optical Depth (AOD) retrieval. This method introduced Moderate-resolution Imaging Spectroradiometer (MODIS) aerosol product to assist in calculating the surface reflectance of the AGRI blue channel and the spectral reflectance ratio between the shortwave infrared (SWIR) channel and the blue channel, then constructed a surface-related dynamic spectral reflectance ratio series by combining the spectral reflectance ratio, Normalized Difference Vegetation Index (NDVI) and Scattering Angle (SCA) to obtain aerosol retrieval results. To verify the accuracy of the SDSRR method, the AOD dataset of the SDSRR method, the official land aerosol products of AGRI (LDA) and Advanced Himawari Imager (AHI) AOD datasets were compared with the ground-based observations of Aerosol Robotic Network (AERONET) and Sun-shy radiometer Observation Network (SONET) in East Asia. The results indicate that the SDSRR method performs more consistently in East Asia compared to the official ARGI aerosol products. The root-mean-square-error (RMSE), mean error (ME), and correlation coefficient (R) between SDSRR AOD and ground-based measurements are 0.286, 0.180 and 0.70, which is better than that of LDA AOD (RMSE = 0.508, ME = 0.292, R = 0.69). Additionally, the RMSE, ME, and R of AHI AOD were 0.253, 0.168, and 0.74, respectively.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2484-2505"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170907","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 influence of atmospheric turbulence-induced optical intensity scintillation on the accuracy of satellite-to-ground laser one-way timing","authors":"Zhiqian Yin ,&nbsp;Xin Zhou ,&nbsp;Lin Lu ,&nbsp;Chuanbo Zhang ,&nbsp;Peng Xiang ,&nbsp;Weiheng Dai ,&nbsp;Yuliang Chen ,&nbsp;Tao Fang ,&nbsp;Zizhuo Li ,&nbsp;Zhuoying Wang ,&nbsp;Jiaqiang Nie ,&nbsp;Xiangfei Chen","doi":"10.1016/j.asr.2024.11.046","DOIUrl":"10.1016/j.asr.2024.11.046","url":null,"abstract":"<div><div>This paper elucidates the mechanism by which atmospheric turbulence leads to errors in satellite-to-ground laser one-way timing, investigates the influence of optical intensity scintillation on the time delay jitter of laser signal arrival in single-satellite-to-ground transmission link. Furthermore, the impact patterns and the magnitude of atmospheric turbulence-induced one-way timing errors and positioning errors across various gradients of observation zenith angles in the GPS four-satellite-to-ground transmission link is also investigated. Besides, the study also explores the impact patterns and magnitude ranges of the effects of optical intensity scintillation on the four-satellite-to-ground time transfer system under different observed zenith angles with similar geometric dilution of precision (GDOP) conditions. The results show that smaller receiver zenith angles result in reduced errors caused by atmospheric turbulence-induced optical intensity scintillation, leading to higher accuracy in four-satellite positioning. When the GDOP factors range from 6.5 to 7.5, the timing errors for multiple sets of satellites consistently exhibit a normal distribution. Specifically, the four-satellite-to-ground laser one-way time transfer deviation averages around 2 ns, with jitter remaining within 1 ns.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2711-2720"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171701","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-based navigation filter for monocular pose and motion tracking of noncooperative spacecraft","authors":"Zilong Chen,&nbsp;Haichao Gui,&nbsp;Rui Zhong","doi":"10.1016/j.asr.2024.11.006","DOIUrl":"10.1016/j.asr.2024.11.006","url":null,"abstract":"<div><div>This paper presents a neural network-based multiplicative extended kalman filtering (MEKF) to track the pose (attitude and position) and 6D motion (angular velocity and linear velocity) of a known tumbling spacecraft using monocular camera for close-proximity operations. The proposed MEKF estimates pose and 6D motion of the target spacecraft relative to servicing spacecraft by combining dynamic and kinematic information with pseudo-measurement information provided by convolutional neural network (CNN). Specifically, a modified EfficientNet-B3 CNN architecture is constructed for recovering pose directly, while the 2D and 6D motion mapping equation is derived to recover 6D motion from monocular video stream. The former is recovered by using the CNN to learn the implicit mapping relationship between image and pose. The latter is recovered using motion mapping equation which combines pose pseudo-measurements with information of two consecutive image frames. The advantage of the proposed method is that it can provide full relative state pseudo-measurements including pose and 6D motion to the filter merely using a single monocular camera as sensor. Subsequently, the Failed Spacecraft Close-range Observation Dataset (FSCOD) is constructed to analyze the performance of the proposed method. The FSCOD consists of training and validation images independent of dynamic trajectories and test images induced by dynamic trajectories of tumbling spacecraft, both of which are generated by Unreal Engine 4 (UE4). Numerical simulations are conducted utilizing sequential images to evaluate the performance of the proposed MEKF and the modified EfficientNet-B3. The results show that the estimation accuracy of the modified EfficientNet-B3 is approximate to that of the UrsoNet, whereas its network parameters are only half of the UrsoNet. Moreover, the proposed MEKF has higher steady-state pose estimation accuracy than the UrsoNet baseline method and is robust to initial estimation errors and measurement noise.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2908-2928"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172000","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":"Analytical estimation of probabilities of impact on Mars and Earth-Moon system for planetary protection assessment of Hayabusa2 extended mission","authors":"Masahiro Fujita ,&nbsp;Hajime Yano ,&nbsp;Yuichi Tsuda","doi":"10.1016/j.asr.2024.11.028","DOIUrl":"10.1016/j.asr.2024.11.028","url":null,"abstract":"<div><div>This paper reports the results of the estimation of the probabilities of impact on Mars, Earth, and the Moon for the asteroid probe Hayabusa2 in its extended mission. The probabilities of impact were estimated using an analytical method instead of a computationally expensive Monte Carlo simulation. The results show that the probability of impacting Mars is <span><math><mrow><mn>5.45</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>7</mn></mrow></msup></mrow></math></span>, which is sufficiently small to meet the planetary protection requirements of the Committee on Space Research. The probabilities of impacting Earth and the Moon are also estimated as <span><math><mrow><mn>0.0116</mn></mrow></math></span> and <span><math><mrow><mn>1.62</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>9</mn></mrow></msup></mrow></math></span>, respectively, which are found to be sufficiently small.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 2982-2993"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172003","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":"Multi-phase trajectory optimization of space-based kinetic impactors for asteroid defense with multi-constraint","authors":"Xiang Li ,&nbsp;Wanchun Chen ,&nbsp;Qiangui Sun ,&nbsp;Jie Gao ,&nbsp;Huiguang Zhao ,&nbsp;Liang Yang","doi":"10.1016/j.asr.2024.11.053","DOIUrl":"10.1016/j.asr.2024.11.053","url":null,"abstract":"<div><div>This paper presents a multi-phase nonlinear trajectory optimization model for space-based launch kinetic impactors, focusing on near-Earth asteroid defense. The model serves the purpose of analyzing space-based launch windows and obtaining optimal trajectories for achieving maximum deflection effectiveness. It comprises three phases: Earth-centered escape phase, heliocentric continuous low-thrust phase, and Keplerian flight phase. In the first phase, the impactor is considered to instantaneously acquire a significant velocity increment from space-based platform because of the extremely short duration of the space-based launch compared with the overall mission. By introducing the true anomaly of the impactor on the designated orbit, the launch velocity increment and launch window are obtained. In the second phase, by optimizing the direction of the low-thrust and the semi-latus rectum of the Keplerian orbit, the optimal shutdown time and state are obtained. In the last phase, the bilateral Keplerian motion between the impactor and the asteroid is considered, incorporating the true anomaly of the predicted impact point and the number of orbital revolutions to establish stringent temporal and spatial beneficial impact constraints. Subsequently, the parameterizable Lambert interception problem with multiple constraints is optimized using the Radau pseudospectral method. Results show that the proposed model has excellent adaptability for different deflection scenarios. Compared with the traditional ground-based continuous low-thrust flight scheme, the proposed method offers a larger launch window that is insensitive to the launch timing and can achieve a greater deflection distance while requiring lower launch capabilities.</div></div>","PeriodicalId":50850,"journal":{"name":"Advances in Space Research","volume":"75 3","pages":"Pages 3063-3081"},"PeriodicalIF":2.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143172016","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}