Results 41 to 50 of about 788,278 (206)
Routing and Downlink Resource Allocation for Multicast Traffic in LEO Satellite Constellations
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT In this work, we optimize unicast and multicast traffic delivery over non‐terrestrial networks (NTNs) to users on the ground through direct satellite downlink (DL). We consider a gateway‐free mesh architecture with low Earth orbit (LEO) satellites interconnected via inter‐satellite links (ISLs), where unicast and multicast services compete for
Federico Lozano‐Cuadra +3 more
wiley +1 more source
Ephemerides of Visual Binaries of highly eccentric orbits [PDF]
, 2013 Ephemerides of binary stars are important information for astronomical observation and research. In this paper, ephemerides of the visual binaries ADS784, ADS13665, A1529, ADS836, ADS 3434, ADS1105 and ADS 3315 have been calculated using a computational ...
Elsanhoury, Waleed +3 more
core +1 more source
Long‐Term Propagation Measurements in Madrid in a Q‐Band Satellite‐to‐Earth Link
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT The Q/V band (40/50 GHz) is gaining interest as satellite operators will need larger bandwidth to be able to provide their services, which are experiencing an increasingly high demand. An accurate characterization of the satellite‐to‐Earth propagation channel is of paramount importance to guarantee a high level of quality of service, by ...
Domingo Pimienta‐del‐Valle +3 more
wiley +1 more source
Precision GPS ephemerides and baselines [PDF]
, 1991 Based on the research, the area of precise ephemerides for GPS satellites, the following observations can be made pertaining to the status and future work needed regarding orbit accuracy. There are several aspects which need to be addressed in discussing
core
City of God and the Duty of Just Memory
Modern Theology, EarlyView.Abstract In a recent essay, Richard Miller claims that Augustine presumes a duty to remember justly in his City of God. However, Miller's brief reference to a presumed duty of “just memory” does not fully explain how Augustine conceptualizes this duty or how it relates to his theological concerns.
Zachary J. Taylor
wiley +1 more source
Under-Developed and Under-Utilized Eclipsing Binary Model Capabilities [PDF]
Journal of Astronomy and Space Sciences, 2012 Existing but largely unused binary star model capabilities are examined. An easily implemented scheme is parameterization of starspot growth and decay that can stimulate work on outer convection zones and their dynamos.
R. E. Wilson
doaj +1 more source
Renaissance Studies, EarlyView.ABSTRACT Seventeenth‐century virtuosi often figured themselves as epistemic weeders, grubbing up rank thickets of accumulated error. In this article, I argue that these metaphors were unnerved by the shifting status of weeds—ostensibly unwanted plants from the margins of cultivated space, unploughed land or the disturbed soils between growing crops—in ...
Francis Taylor
wiley +1 more source
Ephemerides Budenses, magyar nyelvű regeszták [PDF]
, 2014 1790 - az Ephemerides Budenses Tertina Mihály által szerkesztett számainak magyar ...
Balogh, Piroska
core +1 more source
The Astrophysical JournalChina is planning to launch the “Tianwen-4” mission around the year 2030, with its aim being the exploration of Jupiter and its moon, Callisto. Within the realm of deep space exploration, the accuracy of ephemerides is of great importance.
Kai Huang +4 more
doaj +1 more source
Energy Technology, Volume 14, Issue 11, November 2026.A fully sensorless dual‐axis solar tracker based on astronomical ephemerides and postal‐code geographic localization is developed and validated. The proposed discrete tracking strategy increases photovoltaic energy yield while minimizing actuator energy consumption, hardware complexity, and maintenance requirements, providing a practical and cost ...
Khadidja Dahli +4 more
wiley +1 more source