Results 141 to 150 of about 1,938 (262)
A selfl-adaptive magnetic charged system for time-suboptimal formation flying maneuvers [PDF]
, 2019 The development of fast and reliable optimization algorithms is required in order to obtain real-time optimal trajectory on-board spacecraft. In addition, the wide spread of small satellites, due to their low costs, is leading to a greater number of ...
Dario Spiller +2 more
core
Pre‐Existing Plasmaspheric Density Structure
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract We perform a basic model experiment: we run two nearly identical plasmapause simulations, differing only by their initial conditions. The first run contains initial fine‐scale and mesoscale structure, and the second run is initialized with a featureless, circular plasmapause.
J. Goldstein, M. F. Thomsen
wiley +1 more source
Formation flying of spacecrafts for monitoring and inspection
, 2009 Validerat; 20101217 (root)
openaire +1 more source
Statistical Evaluation of a Foreshock Transient Model Using Ground‐Based ULF Wave Observations
Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.Abstract Hot flow anomalies and foreshock bubbles are discontinuity–driven foreshock transients that generate significant geospace disturbances. A recently developed analytical model can predict their upstream perturbations. In this study, we further evaluate this model by comparing its predictions with geomagnetic disturbances measured by ground‐based
Terry Zixu Liu +4 more
wiley +1 more source
Efficient Control of Formation Flying Spacecraft [PDF]
, 2008 . Several upcoming European and American space missions will be operated using a number of spacecraft flying in formation. The associated scientific challenges are demanding, both with respect to the construction of the spacecraft as well as to the ...
Oliver Junge +5 more
core
Estimating Uncertainty of PMW‐Based Convective Fraction Product
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 14, 28 July 2026.Abstract Convective precipitation plays a crucial role in the Earth's hydrological cycle, vertical thermodynamic transport, and natural weather hazards. While satellite passive microwave (PMW) observations offer broad spatial coverage essential for global precipitation monitoring, uncertainties in PMW‐derived precipitation class (i.e., regime) remain ...
Lei Ji +2 more
wiley +1 more source
Local Evolution of a Prenoon Drainage Plume
Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.Abstract Plasmaspheric drainage plumes are typically observed in the postnoon sector during geomagnetic storms, but their local evolution in the prenoon sector remains poorly understood. Here, we report in situ observations from the Van Allen Probe, revealing multiple localized enhancements in cold electron density near apogee in the prenoon sector ...
Suk‐Bin Kang +5 more
wiley +1 more source
International Journal of Aerospace EngineeringThis study explores the challenge of tracking control for spacecraft formation flying (SFF) in the presence of dynamic uncertainties and external perturbations.
Guogang Wang, Wankai Yuan, Xin Wang
doaj +1 more source
Local Estimators for Spacecraft Formation Flying [PDF]
, 2011 A formation estimation architecture for formation flying builds upon the local information exchange among multiple local estimators. Spacecraft formation flying involves the coordination of states among multiple spacecraft through relative sensing, inter-
Mesbahi, Mehran +3 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.Abstract We present observations from two consecutive TRACERS‐2 orbits through the northern low‐altitude cusp. During the first crossing, TRACERS‐2 observed reversed cusp ion dispersion and sunward convection, consistent with magnetopause reconnection tailward of the cusp during this northward IMF interval.
M. Øieroset +22 more
wiley +1 more source