Carrier initial phases estimation for single-channel adjacent-frequency mixture of digitally modulated signals by Yong YANG, Yi-ming GUO, Hai-xin WANG, Hua PENG, Dong-ling ZHANG

“…For single-channel mixture of adjacent-frequency digitally modulated signals which have the fixed frame length and sync codes in non-cooperative satellite communications,a carrier initial phases estimation algorithm which can be applied to both low-order and high-order digitally modulated mixtures was provided according to the differences of parameters in the source signals.The sync data eliminated the frequency offset was added in the interval of frame length firstly,then timing synchronization was accomplished for the added result in terms of power maximization rule,thus the initial phases information was derived.Moreover,the modified Cramer-Rao bound (MCRB) of carrier initial phases for single-channel mixture of adjacent-frequency digitally modulated signals was derived for comparison.Simulation results show that,difference between estimation performance of the proposed algorithm and MCRB becomes smaller with the increase in the number of added frames.…”
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Assessing the Evolution of Urban Areas, Vegetation, and Surface Temperature in Dubai Using Remote Sensing by Uppin Prateek, Sabobeb Lara, Mikhai Engy, Ali Tarig

“…., 2000, 2013, 2016, 2019, and 2022, which provided valuable insights into the city’s environmental and developmental changes through analysis of urban areas’ density, NDVI, and LST from satellite images. The project results show an increase in urban areas over the years, changes in vegetation land, and temperature variations. …”
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Meeting Report: International Magnetosphere Coupling IV (IMC‐IV) Workshop GFZ‐Potsdam, Germany, 2–7 June 2024 by Julia Himmelsbach, Yuri Y. Shprits

“…Key subjects such as the need for advanced modeling, new satellite missions for validation, and the importance of understanding small and large‐scale space phenomena were emphasized by the participants. …”
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RESEARCH AND COLLECTION OF VEGETABLE AND CUCURBIT CROP GENETIC RESOURCES IN THE TERRITORY OF KYRGYZSTAN IN 2014 by D. L. Kornyukhin, G. V. Talovina

“…Also, a set of wild spinach satellite species was detected. Besides, 116 samples of vegetable crops and cucurbits were purchased at the local markets; six samples of wild onion (Allium sp.) were collected in natural environments.…”
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Revealing an unexpectedly low electron injection threshold via reinforced shock acceleration by Savvas Raptis, Ahmad Lalti, Martin Lindberg, Drew L. Turner, Damiano Caprioli, James L. Burch

“…This study combines in situ satellite measurements with recent theoretical developments to establish a reinforced shock acceleration model for relativistic electrons. …”
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Mixed Botryoid and Spindle Cell Bladder Rhabdomyosarcoma: An Outstanding Pediatric Case by Tommaso Alterio, Roberto Chimenz, Salvatore Arena, Giovanni Conti, Sabrina Cardile, Carmelo Romeo, Carmelo Salpietro, Carmelo Fede

“…An explorative cystoscopy was performed and it revealed a nonbleeding lesion, white in colour, pedunculated, projecting into the lumen, and associated with a brown satellite formation. Histological examination showed a mixed Botryoid and Spindle Cell Rhabdomyosarcoma. …”
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Macrophages Are Key Regulators of Stem Cells during Skeletal Muscle Regeneration and Diseases by Junio Dort, Paul Fabre, Thomas Molina, Nicolas A. Dumont

“…Muscle regeneration is a closely regulated process that involves a variety of cell types such as satellite cells, myofibers, fibroadipogenic progenitors, endothelial cells, and inflammatory cells. …”
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Impact on Antijamming Performance of Channel Mismatch in GNSS Antenna Arrays Receivers by Zukun Lu, Junwei Nie, Feiqiang Chen, Gang Ou

“…The performance of antijamming is limited by channel mismatch in global navigation satellite system (GNSS) antenna arrays receivers. Only when the amplitude and phase characteristics of each array channels are the same is the interference likely to be completely suppressed. …”
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Paleogeomorphology Reconstruction of Della Landslide and the Formation of the Shimbar Dam Lake in Indica – Khuzestan province by siyamack sharafi, masoud sadeghirad, zahra javadi nia

“…Della Landslide is an example of such landslide that occurred in the course of Shimbar River drainage and eventually created Lake Shimbar. geoarchaeological field studies performed on this slide using topographic maps, geological, digital model of the area, satellite images and Arc GIS software on the  landslide and  basin lake Shimbar resulted in the identification of the causes of landslides and changes in three stages of the lake. …”
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Research on the Infl uence of Earth Station Tracking Modes on Frequency Compatibility Evaluation Between NGSO-GSO Systems by Xiujuan YAO, Suhui DONG, Xiang GAO, Jing WANG, Jia ZHI, Yunlong SUN

“…Aiming at the simulation analysis scenarios of frequency compatibility between NGSO constellation system and GSO satellite system in the Ka uplink and Ku downlink frequency band, one tracking mode of the earth station of NGSO constellation was proposed.By calculation results analysis, the quantitative infl uence was depicted in common tracking mode of the earth station, such as ephemeris guided tracking, single pulse automatic tracking, and sidelobe tracking.And taking the parameters registered on ITU of Telesat and CHNSAT-98E systems as an example, the simulation data was compared and analyzed in diff erent tracking modes of the earth station.Then, one available tracking strategy of the NGSO constellation station was proposed, which is under the constraint of recommendation ITU-R S.1323.The research results can be used as a reference for NGSO-GSO system compatibility analysis, also the tracking plan formulation of earth stations.…”
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Integrated Architecture and Application Assumption of Earth-Space Communication and Remote Sensing Combination by Wenbo SU, Chi ZHANG, Niwei WANG, Zhichao QIN

“…Remote sensing systems are important means of space-based Earth observation, due to issues such as delayed measurement and control commands, data transmission, data processing, and product distribution in the ＆quot;collection-processing-distribution＆quot; process, it is difficult to effectively achieve real-time intelligent remote sensing application services that cover all day, all weather, and the world.The combination of low earth orbit communication and remote sensing satellite constellations is an effective way to solve service delay and separate control problems in existing systems.It summarized the current situation of communication and remote sensing integration over the world, and then imagined the architecture, development stages, and service modes of the integration of communication and remote sensing.Finally, key technologies under the communication and remote sensing integration architecture were proposed, and the application process of communication and remote sensing integration used typical application scenarios were explored.…”
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Scheme and experiment of fast frequency hopping communication system based on SDR by Chengyu WEN, Conghui LIAO, Hang XIONG, Hong DU

“…A fast frequency hopping scheme based on SDR was proposed to solve the problem that the existing fast frequency hopping communication system relied on satellite timing.Firstly, a true random sequence was used to perform frequency hopping operation on the modulated signal in this scheme.And the frequency hopping table was obtained by channel down-conversion, low-pass filtering and amplitude peak detection operations.Secondly, the receiver searched for the precise starting point by the peak-to-peak distribution characteristics of the quadrature demodulation amplitude of the baseband signal after de-hopping.Finally, down-conversion was performed and the peak-to-peak amplitude of the quadrature demodulation was checked for exceeding the threshold value to achieve de-hopping for frequency hopping signals.The effectiveness and adaptability of the proposed scheme is verified by using two general-purpose SDR devices with a hopping rate of four hops per symbol period in a real channel with other continuous signals.…”
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NEW METHOD OF PRODUCTION OF ALUNINUM SILICON ALLOYS by V. K. Afanasiev, E. L. Marukovich, M. N. Churik, V. V. Gertsen, A. V. Gorshenin, V. A. Samon

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Network Operation,Maintenance and Resource Management in Mega Constellation System by Di ZHOU, Min SHENG, Qi HAO, Jiandong LI, Jianping LIU

“…As the overall scale of the constellation system continues to increase,its service capabilities are gradually expanding from traditional mobile communication services to broadband interconnection services,which puts forward new requirements for the operation,maintenance and resource management in the satellite constellation system.The challenges brought by constellation scale,resource dynamics,and resource failure for the performance management-oriented network operation and maintenance and resource management in mega constellation system (MCS) were fi rst analyzed.The key technologies of network operation,maintenance and resource management for MCS were discussed from the aspects of traff c prediction and resource perception and maintenance and dynamic resource slicing.An intelligent network management and control architecture was proposed to realize lightweight operation and maintenance and resource management for MCS,laying a theoretical foundation for the efficient network operation and maintenance and resource management technology for future space-terrestrial integrated networks.…”
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Research on space-air-ground integrated deterministic networking by Guoyu PENG, Shuo WANG, Guizhen LI, Yuhan WEN, Tao HUANG

“…As the Internet evolves from a consumer network to a productive network, emerging industry applications necessitate differentiated and deterministic service quality assurance and communication capabilities that span all dimensions of time and space.How to realize the heterogeneous compatibility of ubiquitous multi-domain networks and support deterministic transmission between nodes in space-air-ground integrated network (SAGIN) has become a significant research problem.Firstly, the emerging full-domain 6G scenarios along with their requirements for deterministic services were analyzed.Then, the hierarchical space-air-ground integrated deterministic networking architecture, including global cooperative network management and control layer, multi-domain dynamic deterministic fusion layer, and ubiquitous heterogeneous deterministic networking layer, was proposed, and key technologies for fixed-mobile-satellite fusion networks in relevant scenarios were studied.Finally, the challenges and development trend of the space-air-ground integrated deterministic networking were presented.…”
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NDVI aplicado na detecção de degradação de pastagens cultivadas by Elaine Lima Fonseca, Marília Locatelli, Eliomar Pereira Silva Filho

“…For the study, were used OLI / Landsat satellite images 8 scenes 230/69 and 229/69 for the year 2015, with subsequent verification of a field of pasture conditions. …”
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Active Pointing Compensation of a HTS Multibeam Antenna by Xudong Wang, Pengpeng Wang

“…Active pointing compensation of a High Throughput Satellite (HTS) multibeam antenna via microfiber composites (MFCs) is studied in this paper. …”
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Future architecture and evolution of communication network by Sheng ZHANG, Wei RONG

“…With the rapid development of the internet,the network bearer content is gradually transformed from a service based on connection-based information interaction to a service based on content sharing (video).The network transmits a large amount of redundant information,resulting in abnormal large-scale investment.And the quality of the service is difficult to guarantee,and it is urgent to study and construct a network that matches the business development.The content sharing connection relationship and the communication network architecture connection relationship were studied,and the two-dimensional poor time distribution or three-dimensional distribution and other implementation methods were explored.CDN was constructed to construct the content edge node,and the core network,wireless network,bearer network architecture and network element deployment were optimized.And space-based network such as satellite was considered to introduce to build a scale-free small hop network on the existing communication network to achieve matching of network architecture and content distribution.…”
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Analysis of influence of ionosphere and troposphere model on RAIM availability of COMPASS by Wei-dong JIAO, Zhi-hu TANG, Xiao-yun SHEN

“…The ionosphere and troposphere are main error sources of satellite navigation system measurement and main factors of COMPASS availability. …”
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Reservas de valor na Amazônia: Uma análise da intersecção entre desmatamento e rentismo by Bruno Valdambrini, Angelita Matos Souza

“…By analyzing 134.3 billion square meters of orbital images from the SENTINEL-2 satellite over eight years, vast deforested areas were identified that had stabilized vegetatively, thereby becoming recognized as reserves of value. …”
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