Results 111 to 120 of about 43,513 (282)
Lightning Generated Whistlers: Variability of Event‐Based Wave Distributions
Journal of Geophysical Research: Space Physics, Volume 130, Issue 8, August 2025.Abstract Lightning‐generated whistlers (LGWs) are an important wave mode in the inner magnetosphere, where they play a strong role in the radiation belt slot region formation through scattering of radiation belt electrons into the loss cone. Recent LGW studies have calculated time‐averaged wave parameters which are then used to calculate quasi‐linear ...
A. D. Shane +4 more
wiley +1 more source
Period derivative of the M15 X-ray Binary AC211/X2127+119
, 1998 We have combined Rossi X-ray Timing Explorer observations of X2127+119, the low-mass X-ray binary in the globular cluster M15, with archival X-ray lightcurves to study the stability of the 17.1 hr orbital period.
Armitage +23 more
core +2 more sources
The Benefit of Space Clocks for the Deep Space Network
Radio Science, Volume 60, Issue 8, August 2025.Abstract Ground‐based atomic clocks have been the foundation of the Deep Space Network's (DSN's) ability to provide high‐precision tracking to deep space users for navigation and radio science since its inception in the mid‐1960s. This paper describes the development of space clocks that could aid the DSN and the solar system exploration enterprise ...
T. Ely, E. Burt, K. Cheung, R. Tjoelker
wiley +1 more source
SoftwareXLEO (Low Earth Orbit)-based PNT (Positioning, Navigation and Timing) has become a research topic of much interest and a focus of development. As LEO satellites for PNT are expected to independently provide space-time references in the future, similar to ...
Zhao Xi, Yu Baoguo, Luo Bin
doaj +1 more source
Near-Real-Time Global Thermospheric Density Variations Unveiled by Starlink Ephemeris
Remote SensingPrevious efforts to retrieve thermospheric density using satellite payloads have been limited to a small number of satellites equipped with GNSS (Global Navigation Satellite System) receivers and accelerometers.
Zhuoliang Ou +10 more
doaj +1 more source
Improving the Accuracy of the Martian Ephemeris Short-Term Prediction
Advances in Astronomy, 2018 The Chinese Mars exploration mission is planned to be launched in 2020, which includes an orbiter, a lander, and a rover. High precision Martian ephemeris is very important in Mars exploration, especially for the Martian orbit insertion and the Martian ...
Quan Shan +5 more
doaj +1 more source
Orbit optimization for ASTROD-GW and its time delay interferometry with two arms using CGC ephemeris
, 2012 ASTROD-GW (ASTROD [Astrodynamical Space Test of Relativity using Optical Devices] optimized for Gravitation Wave detection) is an optimization of ASTROD to focus on the goal of detection of gravitation waves. The detection sensitivity is shifted 52 times
+36 more
core +1 more source