New Index to Characterize Ionospheric Irregularity Distribution by Endawoke Yizengaw

“…The DGRI is derived from in situ density measurements onboard recently launched constellation of low‐Earth‐orbiting satellites (COSMIC‐2 and ICON) at the rate of 1 Hz. …”
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Defining geosciences research data through metadata reuse: by Alexandre Ribas Semeler, Luana Farias Sales, Adilson Luiz Pinto, Roberta Pereira da Silva de Paula, Valquer Cleyton Paes Gandra, Heloisa Costa

“…Geosciences research data combine laboratory and fieldwork techniques, utilizing technologies like satellites and climate sensors to study Earth’s processes. …”
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Dry Deposition from Sahara Sources Regions of Western Africa by B. Douaiba, A. Azzi, A. Khorsi, A. Benlefki

“…The results have been compared with surface data from weather stations in North Africa, data of dry metals from stations located in Gran Canaria, and various satellite images such as European Organization for the Exploitation of Meteorological Satellites and Moderate Resolution Imaging Spectroradiometer for the period in question.…”
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Secure and efficient batch authentication scheme based on dynamic revocation mechanism in space information network by Yinghui ZHANG, Lingyun HU, Yixin LI, Jianting NING, Dong ZHENG

“…A secure and efficient batch authentication scheme based on dynamic revocation mechanism was proposed for the problem of cross-domain authentication of a large number of mobile users in space information networks.Early key negotiation was achieved by predicting the satellite trajectory and updating the session key in real time.Algorithms were designed for a single as well as a large number of mobile terminals to perform signing and verification, which effectively reduce the computational burden of satellites.Cuckoo filters were adopted by the new scheme to achieve dynamic revocation and malicious access control of mobile terminals.Finally, under the Diffie-Hellman assumption, the proposed scheme was proved to be resistant to replay and man-in-the-middle attacks based on a random oracle model and automated validation of internet security protocols and applications.Security goals such as traceability and revocability were achieved by the scheme, thus improving the efficiency of transmission and computation by more than 80% and 20%, respectively, compared with the existing optimal scheme.…”
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An Eigenpoint Based Multiscale Method for Validating Quantitative Remote Sensing Products by Shaohui Chen, Hongbo Su

“…The ground based eigenpoints derived from the forecasted QRSP can be used as the observation positions when the satellites pass by the studied area. Experimental results demonstrate that the proposed method is manpower-and time-saving compared with the ideal scanning method and it is satisfying to perform simultaneous observation at these eigenpoints in terms of efficiency and accuracy.…”
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Spatial Downscaling and Simulation of TRMM Data at High Altitudes — A Case Study of Lhasa River by DAWA Ciren, ZHAO Keke, GU Yu, LUO Xiaoyu, CIWANG Dunzhu

“…As measured precipitation data are often lacking at high altitudes,remote sensing data by satellites could compensate for the shortage of traditional observation.This paper takes the Lhasa River basin as the study area and makes an in-depth analysis of the relationship between precipitation,vegetation,and temperature in this basin.On this basis,the multiple linear regression,residual analysis,and inverse distance weighting (IDW) of spatial interpolation are employed to spatially downscale the TRMM 3B43V7 data that overestimates the precipitation in the study area by about 29% and has a spatial resolution of 0.25°×0.25° to 0.05°×0.05°.Given the measured data of stations,the downscaled data is further revised.The accuracy of the final high-quality precipitation dataset is greatly improved in most regions of the Lhasa River basin,and the dataset can provide basic statistical support for research on hydrology and water resources at high altitudes.…”
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Basins of Convergence in a Multi-Perturbed CR3BP by Alicia Herrero, Santiago Moll-Lopez, José-A. Moraño, Erika Vega-Fleitas, Daniel Villalibre

“…The circular restricted three-body problem (CR3BP) is analyzed to introduce additional factors into the dynamic model, such as radiation forces, flattening of the primary bodies, relativity effects, and the presence of natural satellites. The introduction of these factors increases the accuracy when obtaining the position of the Lagrange points and the basins of convergence of the system. …”
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DESIGN AND TEST OF A MULTI-DIMENSIONAL MICRO-VIBRATION SIMULATOR by WANG Bing, XU ZhenBang, YANG JianFeng, WANG XiaoMing, WU QingWen

“…To simulate the micro-vibration of the space platform such as satellites,space stations and so on,a multidimensional micro-vibration simulator based on the Gough-Stewart configuration was designed.Firstly,the structural design of the multi-dimensional micro-vibration simulator was introduced.The theoretical model of the simulator is established by NewtonEuler’s method.In this model,the situation of misalignment between the origin of the relative reference frame and the barycenter of upper platform and load was considered.Combining with the principle of virtual work,the equations of the natural frequencies and mode shapes could be gained.Secondly,the modal of the simulator was analyzed by the finite element method and the analytical method.The first six natural frequencies and the modal shapes were obtained.The maximum error of FEA simulation is4.17% compared with the mathematical analytical solution.Finally,a prototype of the micro-vibration simulator was manufactured and its performance was testing.The test results indicate that the effective operating frequency of the simulator is up to 100 Hz,meeting the need of the vibration test.…”
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A Non-interactive Key Exchange Scheme for Space-IntegratedGround Information Network Based on Blockchain by Mengru LIU, Yulong FU, Jin CAO, Hui LI

“…For scenarios such as space-integrated-ground information network where satellite resources are limited and communication delays are large, in response to the requirements of non-interactive key exchange in the satellite communication network, a non-interactive key exchange scheme for space-integrated-ground information network based on blockchain and Diffi e-Hellman key exchange protocol was proposed.The scheme arranged the blockchain in space-integrated-ground information network to form TDYTH blockchain.After the satellite node was registered, its related information was stored in TDYTH blockchain.When the satellite node needed to communicated with the long-distance node such as NCC, the two parties could query the immutable information stored in TDYTH blockchain to generated the shared session key, established consensus, and then completed access authentication and key distribution under non-interactive conditions.The result of simulation demonstrated that the scheme we proposed could meet the requirements of non-interactive key distribution of satellites and other nodes, and could signifi cantly improved security and robustness.…”
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Detection of the wheat rust disease infected farms using Landsat images by Mohamad Reza Mobasheri:, Samira Ranjbar

“…For this, the sensor data of Landsat 7 satellites in growing season of 2013 and 2014 along with some laboratorial data containing reflectance spectrum of leaf and leaf health degree in different levels of disease are used. …”
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GPS Based Reduced-Dynamic Orbit Determination for Low Earth Orbiters with Ambiguity Fixing by Yang Yang, Xiaokui Yue, Jianping Yuan

“…With the ever-increasing number of satellites in Low Earth Orbit (LEO) for scientific missions, the precise determination of the position and velocity of the satellite is a necessity. …”
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OPTIMAL SIMULATION DESIGN OF SPACEBORNE CONNECTOR by YU ChengYue, LIU Bo, WANG ChunPeng, XUE Chuang, AN MingXin

“…In the design and research on the spaceborne connector of aerospace satellites, a joint optimization method is proposed. …”
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Análisis espectral de nubes de sal originadas en las cercanías de la laguna de Mar Chiquita utilizando sensores remotos. by Diana Rodriguez, Silvana Carina Bolzi, Ines Velasco, Mónica Marino

“…From 2006 observations from space with different satellites allowed document the presence of white clouds originating from the salt that is raised from the ground with intensity winds occur. …”
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Research on Intelligent Networking Architecture for the Integrated Space-Terrestrial Networks by Tingting ZHANG, Nan WU, Haipeng YAO

“…The integrated space-terrestrial networks (ISTN), characterized by the high-dynamic of topology, the diversifi cation of services and the constrained resource of satellites, face great challenges in the integration of networking.To achieve network capabilities of intelligent reconstruction, on-demand adjustment, eff ective management and control, the intelligent networking method for ISTN by applying SDN, NFV and artifi cial intelligence were studied.In-depth analysis of the development status of the world-earth fusion network, an intelligent and virtualization-driven world-earth fusion network architecture was proposed.On this basis, to addressed the challenges of intelligent networking brought about by network element heterogeneity, large space-time scale, and diff erentiated service requirements, the multidimensional heterogeneous data plane resource pooling, multi-domain collaborative sensing function on-demand deployment, multi-layer multi-domain hybrid network autonomous control, centralized and distributed network intelligence for ＆quot;cloud-edge＆quot; collaboration, etc.were proposed, which realized on-demand reconstruction of the world-earth fusion network and intelligent service guarantee capabilities.…”
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La trame arborée : un élément pertinent pour articuler paysage et biodiversité dans la politique de la trame verte et bleue aux échelles infrarégionales ? by Éric Maire, Philippe Béringuier, Gérard Briane, Bertrand Desailly, Sylvie Guillerme

“…We shall demonstrate through an example in the Pyrenean Piedmont Ariège region, that there are viable methods for making detailed maps of green corridors by using images from the Pléaides satellites. These knowledge tools have been tested in an interactive workshop which revealed a great variety of representations of the green corridor among local stakeholders.…”
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The Geoeffectiveness of Solar Wind Current Sheets and Its Modulation by Foreshock Ions by Boyi Wang, Yi Wang, Terry Z. Liu, Vassilis Angelopoulos

“…Abstract We examined the evolution of 34 solar wind bifurcated current sheets in the magnetosheath and their magnetospheric responses, using the in‐situ observations of the THEMIS probes and the GOES satellites. The role of foreshock ions in that process is also determined. …”
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Potential Structural Damage Characterization through Remote Sensing Data: A Nondestructive Experimental Case Study by Marta Terrados-Cristos, Francisco Ortega-Fernández, Marina Díaz-Piloneta, Vicente Rodríguez Montequín, Javier García González

“…Structural health monitoring systems based on satellite information can help to ensure the proper behavior of civil structures and are an interesting alternative for remote locations. …”
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The kinetic relativity theory – hiding in plain sight by Loen Mark V.

“…Laboratory experiments with a single moving body fit this concept. However, GPS satellites and their ground clocks measure time dilation by a velocity relative to a common non-rotating Earth inertial frame. …”
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Intelligent anti-jamming decision algorithm based on proximal policy optimization by MA Song, LI Li, LI Wei, HUANG Wei, WANG Jun

“…The existing intelligent anti-jamming methods based on deep reinforcement learning are applied to space-ground TT&C and communication links, in which the deep neural network used for decision-making has a complex structure, and the resources of satellites and other vehicles are limited, making it difficult to independently complete the timely training of complex neural network under the constraints of limited complexity, and the decision-making of anti-jamming cannot converge. …”
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FloorLoc-SL: Floor Localization System with Fingerprint Self-Learning Mechanism by Kornkanok Khaoampai, Kulit Na Nakorn, Kultida Rojviboonchai

“…This is because obstacles and structures of building block GPS signal from the satellites. Many indoor localization systems have been proposed but most of them are developed over single-floor scenario only. …”
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