Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 10, Pages 4858-4864Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL068529
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Funding
- Austrian Space Applications Programme [FFG 847969]
- Austrian Science Funds FWF [I2016-N20]
- NASA [NNG04EB99C]
- Austrian Science Fund (FWF) [I2016] Funding Source: Austrian Science Fund (FWF)
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Each spacecraft of the recently launched magnetospheric multiscale MMS mission is equipped with Active Spacecraft Potential Control (ASPOC) instruments, which control the spacecraft potential in order to reduce spacecraft charging effects. ASPOC typically reduces the spacecraft potential to a few volts. On several occasions during the commissioning phase of the mission, the ASPOC instruments were operating only on one spacecraft at a time. Taking advantage of such intervals, we derive photoelectron curves and also perform reconstructions of the uncontrolled spacecraft potential for the spacecraft with active control and estimate the electron plasma density during those periods. We also establish the criteria under which our methods can be applied.
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