Results 51 to 60 of about 998,251 (134)

Data-driven Uncertainty Quantification of the Wave Telescope Technique: General Equations and Demonstration Using HelioSwarm

The Astrophysical Journal Supplement Series, 2023
The upcoming NASA mission HelioSwarm will use nine spacecraft to make the first simultaneous multipoint measurements of space plasmas spanning multiple scales.
T. Broeren, K. G. Klein
doaj   +1 more source

Observations of the cusp region under northward IMF [PDF]

Annales Geophysicae, 2001
We present a comparative study of the cusp region using the EISCAT Svalbard Radars (ESR) and the Cluster spacecraft. We focus in this paper on 2 February 2001, over the time period from 07:30 UT to 12:00 UT when the oblique ESR antenna pointing ...
F. Pitout, F. Pitout, J.-M. Bosqued, D. Alcaydé, W. F. Denig, H. Rème   +5 more
doaj   +1 more source

Application Status and Prospect of Digital Twin for On-Orbit Spacecraft

IEEE Access, 2021
With cloud computing, big data, artificial intelligence and other new information technologies going into space, the era of space intelligence is coming. The spacecraft is facing more frequent and multi-task tests in an unprecedented complex environment,
Wenqiang Yang, Yu Zheng, Shaoyang Li
doaj   +1 more source

Analysis of plasmaspheric plumes: CLUSTER and IMAGE observations [PDF]

Annales Geophysicae, 2006
Plasmaspheric plumes have been routinely observed by CLUSTER and IMAGE. The CLUSTER mission provides high time resolution four-point measurements of the plasmasphere near perigee.
F. Darrouzet, J. De Keyser, P. M. E. Décréau, D. L. Gallagher, V. Pierrard, J. F. Lemaire, J. F. Lemaire, B. R. Sandel, I. Dandouras, H. Matsui, M. Dunlop, J. Cabrera, A. Masson, P. Canu, J. G. Trotignon, J. L. Rauch, M. André   +16 more
doaj   +1 more source

Active spacecraft potential control for Cluster – implementation and first results [PDF]

Annales Geophysicae, 2001
Electrostatic charging of a spacecraft modifies the distribution of electrons and ions before the particles enter the sensors mounted on the spacecraft body. The floating potential of magnetospheric satellites in sunlight very often reaches several
K. Torkar, W. Riedler, C. P. Escoubet, M. Fehringer, R. Schmidt, R. J. L. Grard, H. Arends, F. Rüdenauer, W. Steiger, B. T. Narheim, K. Svenes, R. Torbert, M. André, A. Fazakerley, R. Goldstein, R. C. Olsen, A. Pedersen, E. Whipple, H. Zhao   +18 more
doaj   +1 more source

Cluster as current sheet surveyor in the magnetotail [PDF]

Annales Geophysicae, 2013
A novel analysis technique is presented to estimate the current sheet thickness unambiguously and directly, without associating time series data with spatial structure.
Y. Narita, R. Nakamura, W. Baumjohann
doaj   +1 more source

Street Guide to NASA, Manned Spacecraft Center Leased Office Facilities [PDF]

, 2018
Booklet containing a map of MSC leased office buildings in Houston ...

core   +1 more source

Cluster and Double Star multipoint observations of a plasma bubble [PDF]

, 2009
Depleted flux tubes, or plasma bubbles, are one possible explanation of bursty bulk flows, which are transient high speed flows thought to be responsible for a large proportion of flux transport in the magnetotail. Here we report observations of one such
Lahiff, A. D., Volwerk, M., Pu, Z., Lester, M., Kistler, L. M., Lucek, E., Mouikis, C., Grocott, A., Lui, A. T. Y., Shi, J., Fazakerley, A. N., Walsh, A. P., Shen, C., Dandouras, I., Taylor, M. G. G. T., Zhang, T. L., Dunlop, M. W.   +16 more
core   +5 more sources

Distributed angle‐only orbit determination algorithm for non‐cooperative spacecraft based on factor graph

IET Radar, Sonar & Navigation
Bayesian filtering provides an effective approach for the orbit determination of a non‐cooperative target using angle measurements from multiple CubeSats.
Zhixun Zhang, Keke Zhang, Leizheng Shu, Zhencai Zhu, Meijiang Zhou   +4 more
doaj   +1 more source

Small-scale dipolarization fronts in the Earth′s magnetotail

Earth and Planetary Physics, 2019
Previous studies suggest that dipolarization fronts (DFs) are 1 to 3RE (RE is the earth radius) wide in the dawn-dusk direction. Recent kinetic simulations have found that DFs may break up into small-scale structures after they are produced by ...
Jing Huang, Meng Zhou, HuiMin Li, XiaoHua Deng, Jiang Liu, ShiYong Huang   +5 more
doaj   +1 more source