Results 121 to 130 of about 26,090 (296)
Radiation Belt Electron Acceleration Inside the Plasmasphere
Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.Abstract We report a new population of outer belt electron acceleration events ranging from hundreds of keV to ∼1.5 MeV that occurred inside the plasmasphere, which we named “Inside Events” (IEs). Based on 6 year observations from Van Allen Probes, we compare the statistical distributions of IEs with electron acceleration events outside the ...
Man Hua, Jacob Bortnik
wiley +1 more source
Prediction of Communication Outage Period between Satellite and Earth station Due to Sun Interference [PDF]
Journal of Astronomy and Space Sciences, 2010 We developed a computer program to predict solar interference period. To calculate Sun‘s position, we used DE406 ephemerides and Earth ellipsoid model. The Sun‘s position error is smaller than 10arcsec. For the verification of the calculation, we used
Yongjun Song +3 more
doaj +1 more source
On the Juno Radio Science Experiment: models, algorithms and sensitivity analysis
, 2014 Juno is a NASA mission launched in 2011 with the goal of studying Jupiter. The probe will arrive to the planet in 2016 and will be placed for one year in a polar high-eccentric orbit to study the composition of the planet, the gravity and the magnetic ...
Dimare, Linda +3 more
core +1 more source
Report of the IAU Commission 4 Working Group on Standardizing Access to Ephemerides and File Format Specification [PDF]
arXiv, 2015 The IAU Commission 4 Working Group on Standardizing Access to Ephemerides recommends the use of the Spacecraft and Planet Kernel (SPK) format as a standard format for the position ephemerides of planets and other natural solar system bodies, and the use of the Planetary Constants Kernel (PCK) format for the orientation of these bodies.
arxiv
Radiation‐Belt Dropouts: Relationship With Geomagnetic Storms and MeV Precipitation
Geophysical Research Letters, Volume 52, Issue 4, 28 February 2025.Abstract To better understand rapid radiation belt losses, this statistical study examines dropouts, defined as a phase‐space density (PSD) decrease by a factor of ≥5 ${\ge} 5$ within 8 hr. The relationship between dropouts, storm parameters, solar‐wind drivers, geomagnetic indices, and MeV electron precipitation is analyzed.
Domenique Freund +5 more
wiley +1 more source
, 2016 All the fields of the extended space mission Kepler/K2 are located within the ecliptic. Many solar system objects thus cross the K2 stellar masks on a regular basis.
Berthier, J. +4 more
core +3 more sources
Decoupled and coupled moons’ ephemerides estimation strategies application to the JUICE mission [PDF]
Planetary and Space Science, 2022 M. Fayolle +4 more
semanticscholar +1 more source
Uncertainties in Ground‐Based Visual Double Star Measures
Astronomische Nachrichten, Volume 346, Issue 2, February 2025.ABSTRACT Stellar masses are found from the orbital elements of binary systems which are, in turn, computed from weighted astrometric measures. Astrometric measures of double stars (their position angle and separation) rarely include uncertainties, and published binary star orbits rarely include the weighting systems used in the determination of the ...
Roderick R. Letchford, Graeme L. White
wiley +1 more source
A 16-parameter GEO Broadcast Ephemeris [PDF]
Journal of Geodesy and Geoinformation Science, 2018 Currently, the broadcast ephemerides used in GEOs are same as those of the MEOs and IGSOs in the BeiDou navigation constellation. However, a trade-off strategy, i.e.
Zhongkai ZHANG,Lan DU,Li LIU,Feng HE,Yu LU,Peiyuan ZHOU
doaj