Results 51 to 60 of about 4,598 (208)
Laser Terminals on CubeSats: Developments for Telecommunications and Quantum Links
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 133-146, May/June 2025.ABSTRACT Satellite‐based laser communication is an emerging technology that is finding its way from research to industry. Compared to radio frequency (RF) systems, it has a more efficient size, weight, and power budget and, furthermore, is license free.
Christian Roubal +8 more
wiley +1 more source
Remote SensingThis study investigates and verifies the feasibility of the precise point positioning (PPP)-B2b enhanced real-time (RT) precise orbit determination (POD) of low Earth orbit (LEO) satellites.
Yali Shi +5 more
doaj +1 more source
The Selection of Ground Stations for IGS Products [PDF]
Journal of Astronomy and Space Sciences, 2007 The selection of ground stations is one of the essential process of IGS (International GNSS Service) products. High quality GPS data should be collected from the globally distributed ground stations.
Sung-Wook Jung +5 more
doaj +1 more source
The Radio Wave Polarization of Saturn Lightning Observed by Cassini
Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer +4 more
wiley +1 more source
Empirical Reconstruction of Pre‐1995 Extreme Storms Using ML‐Derived Solar Wind Inputs
Space Weather, Volume 23, Issue 6, June 2025.Abstract The storm‐time geomagnetic field and electric currents are reconstructed for extreme storms before 1995: the July 1982 superstorm and the March 1989 Hydro‐Québec grid collapse event. The reconstructions are based on an improved magnetic field data mining method utilizing recently published machine learning‐derived solar wind data.
G. K. Stephens +3 more
wiley +1 more source
THE ASTROMETRIC RESULTS OF OBSERVATIONS OF PERIODICAL COMETS AT KT-50 TELESCOPE IN RI “MAO”
Odessa Astronomical Publications, 2017 The astrometric results of the observations of 10 periodical comets in 2017 are presented. The observations were made with telescope KT-50 telescope in RI «Mykolaiv Astronomical Observatory».
A. V. Pomazan +2 more
doaj +1 more source
Variation of Model‐Predicted Reconnection Voltages Applied to Uranus' Dayside Magnetosphere
Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.Abstract Uranus provides a key missing piece for fundamentally understanding solar wind‐magnetospheric interactions due to its location in the outer solar system. Whether the viscous‐like interaction overtakes global magnetic reconnection as the dominant process at the magnetopause of the outer planets remains unresolved.
S. Zomerdijk‐Russell +2 more
wiley +1 more source
Real-Time Precise Point Positioning Method Considering Broadcast Ephemeris Discontinuities
NavigationWith advancements in the broadcast ephemeris accuracy of global navigation satellite systems (GNSSs), precise point positioning based on broadcast ephemeris (BE-PPP) is gradually showing promising prospects.
Quanrun Cheng +3 more
doaj +1 more source