-
1601
Small Mars Mission Architecture Study
Published 2021-01-01“…A study was undertaken in the Concurrent Design Facility at ESA ESTEC to assess low-cost mission architectures for small satellite missions to Mars. Given strict programmatic constraints, the focus of the study was on a low-cost (<250MEuro Cost at Completion), short mission development schedule with a cost-driven spacecraft design and mission architecture. …”
Get full text
Article -
1602
Key technologies and standards progress for 5G positioning
Published 2023-11-01“…Location service features are enabled in 5G to allow new and innovative location-based services to be developed for kinds of scenarios and the key performance requirements are identified by 3GPP.Firstly, the planning of location service feature in each standard release of 5G was introduced based on the standard process of 5G high-accuracy positioning in 3GPP.Secondly, 5G network-assisted BeiDou navigation satellite system was studied, including the positioning technologies and the standard progress of A-BDS in 3GPP.Thirdly, the network architecture, key technologies and the standards progress for sidelink positioning in 5G were introduced.Finally, the evolution of 6G positioning was analyzed.…”
Get full text
Article -
1603
A Novel CPW-Fed UWB Antenna with Band-Stop Function
Published 2014-01-01“…Simulated and measured results show that the designed antenna operates at 2.9 GHz–13.08 GHz with band rejection in the frequency band of 7.7 GHz–9.05 GHz for satellite applications, and the proposed antenna is suitable for UWB wireless communication applications.…”
Get full text
Article -
1604
Spatiotemporal analysis of LST changes in Morocco: Assessing climate change impacts
Published 2025-01-01“…LST data were obtained from the thermal infrared satellite sensor MODIS (Moderate Resolution Imaging Spectroradiometer), providing monthly composites of day and night values at a 1 km resolution from 2018 to 2023.…”
Get full text
Article -
1605
Climate-Aware Machine Learning for Above-Ground Biomass Estimation
Published 2024-12-01“…This study explores the role of data science, machine learning, and artificial intelligence in addressing environmental challenges, specifically focusing on the estimation of Above-Ground Biomass (AGBM) using satellite imagery. The research aims to compare the effectiveness of temporal and spatial modelling techniques in AGBM estimation and to assess the utility of the AI-Climate Alignment Framework proposed by Kaack et al. (2022) in guiding environmentally responsible model development. …”
Get full text
Article -
1606
Modeling and Prediction of Momentum Wheel Speed Data
Published 2020-01-01“…To solve the problems of data loss and unequal interval of momentum wheel (MW) speed during a satellite stable operation, this paper presents a multidimensional AR model. …”
Get full text
Article -
1607
Analysis of Performance Degradation Introduced by Radome for High-Precision GNSS Antenna
Published 2019-01-01“…High-precision global navigation satellite system (GNSS) antennas employed on the fixed ground station are usually equipped with radomes, which are potential in yielding degradation of key parameters of antenna such as axial ratio and gain. …”
Get full text
Article -
1608
Automated Tree Detection Using Image Processing and Multisource Data
Published 2025-01-01“…The proposed approach utilizes satellite imagery and height maps, employing image-processing techniques and integrating data from various sources. …”
Get full text
Article -
1609
Planetary Sciences, Geodynamics, Impacts, Mass Extinctions, and Evolution: Developments and Interconnections
Published 2016-01-01“…Research frontiers in geophysics are being expanded, with development of new fields resulting from technological advances such as the Earth observation satellite network, global positioning system, high pressure-temperature physics, tomographic methods, and big data computing. …”
Get full text
Article -
1610
Research Status of Space-air-ground Integrated Network and Application Prospects of New Technologies
Published 2021-12-01“…To achieve the demand of all-time all-area coverage of wireless communications, space-air-ground integrated network (SAGIN) is important systematic development direction with global coverage, optional reception, and proportional demand service, which deeply integrate the satellite-based network, aerial-based network, and terrestrial-based network to break down the systematic barriers of each network and give full play to the functions of diff erent network dimensions.The development process of the SAGIN from the aspects of policy orientation, academic innovation, standards and norms were discussed.At the same time, the applications of the new emerged technology in the SAGIN were prospected, and the possible development direction of the SAGIN in the future was discussed.…”
Get full text
Article -
1611
Ženská nucená práce v českých zemích 1939–1945
Published 2019-12-01“…It has affected the lives of millions of people – both men and women – in Germany, in the occupied territories and in satellite states. However, research has so far taken special note of the role and position of women in the forced labor system. …”
Get full text
Article -
1612
Rio Ibicuí: “rio de areia” durante a estiagem 2019-2020, na confluência com o rio Uruguai, Brasil
Published 2020-10-01“…The objective of the study was to analyze a set of images, showing the hydromorphological forms of sedimentation in the area of confluence of the Ibicuí with Uruguay, visible due to the low water level. Satellite images from different periods have been used to show the hydrological dynamics that have arisen in the region. …”
Get full text
Article -
1613
Les mobilités domicile-travail dans les réseaux d’agglomérations
Published 2024-03-01“…The mobility networks thus formed result not only in creating links between regional metropolitan areas and their satellite urban cores, but also in developing flows between greater urban areas or between smaller urban cores. …”
Get full text
Article -
1614
Natal Dispersal of Eastern Imperial Eagles: Preliminary Results For the Central European Population
Published 2023-10-01“…In frame of these activities imperial eagle were tagged by satellite transmitter since 2003 in several projects by different organisations of the region. …”
Get full text
Article -
1615
Variability and Source Characterization of Regional PM of Two Urban Areas Dominated by Biomass Burning and Anthropogenic Emission
Published 2022-04-01“…Overall, the reanalysis of satellite data captured the long-term variability and origins of surface PM in two vital urban regions in the Philippines. …”
Get full text
Article -
1616
Monitoring changes of forest height in California
Published 2025-01-01“…The model, trained on data from 2019 to 2020, showed a similar accuracy when applied to satellite imagery acquired in 2021–2022 allowing a robust detection of changes caused by natural and man-made disturbances of forest. …”
Get full text
Article -
1617
Therapeutic efficacy and prognostic indicators in re-resection for recurrent hepatocellular carcinoma: Insights from a retrospective study
Published 2025-01-01“…Key prognostic factors include Child-Pugh classification, time to recurrence, tumor differentiation, and satellite nodules.…”
Get full text
Article -
1618
An Optimization Synchronization Algorithm for TDDM Signal
Published 2016-01-01“…The time division data modulation (TDDM) mechanism is recommended to improve the communications quality and enhance the antijamming capability of the spread spectrum communication system, which will be used in the next generation global navigation satellite (GNSS) systems. According to the principle and the characteristics of TDDM signal, an optimization synchronization algorithm is proposed. …”
Get full text
Article -
1619
Design of Multilevel Sequential Rotation Feeding Networks Used for Circularly Polarized Microstrip Antenna Arrays
Published 2012-01-01“…They can find wide applications in phased array radar and satellite communication systems.…”
Get full text
Article -
1620
Design, Analysis, Optimization, Manufacturing, and Testing of a 2U Cubesat
Published 2018-01-01“…The design optimization, development, and verification by analysis and testing of the 1st Greek cubesat, developed by the University of Patras and Libre Space Foundation (UPSat (University of Patras Satellite)), is presented. The key innovative approach includes the replacement of the aluminum side faces with structural composite components, keeping the commonly used aluminum frame. …”
Get full text
Article