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Exploring planetary magnetic environments using magnetically unclean spacecraft: a systems approach to VEX MAG data analysis
Zhang, T. L.; Balikhin, M. A.; Delva, M. +4 more
In situ measurements of the magnetic field are vital to the study of many fundamental problems in planetary research. Therefore the magnetometer experiment is a key element of the payload of Venus Express. In addition to the interaction of the solar wind with Venus, these measurements are crucial for the study of atmospheric escape and detection o…
Comparison of accelerated ion populations observed upstream of the bow shocks at Venus and Mars
Coates, A. J.; Fedorov, A.; Barabash, S. +12 more
Foreshock ions are compared between Venus and Mars at energies of 0.6~20 keV using the same ion instrument, the Ion Mass Analyser, on board both Venus Express and Mars Express. Venus Express often observes accelerated protons (2~6 times the solar wind energy) that travel away from the Venus bow shock when the spacecraft location is magnetically co…
Occurrence rate of magnetic holes between 0.72 and 1 AU: comparative study of Cluster and VEX data
Zhang, T. L.; Walker, S. N.; Amariutei, O. A.
Localised depressions in the magnetic field magnitude, or magnetic holes, are common features in many regions of solar system plasma. Two distinct mechanisms for their generation have been proposed. The first proposed that the structures are generated locally, close to the point of observation. The alternative has been proposed by Russell et al. (…
Spatial scales of the magnetic ramp at the Venusian bow shock
Zhang, T. L.; Walker, S. N.; Pope, S. A. +1 more
Typically multi-spacecraft missions are ideally suited to the study of shock spatial scales due to the separation of temporal and spatial variations. These missions are not possible at all locations and therefore in-situ multi-spacecraft measurements are not available beyond the Earth. The present paper presents a study of shock spatial scales usi…