Space Plasma Detectors on NEXTSat-1 for Ionospheric Measurements
2018
This paper describes the Space Plasma Detectors (SPD) on board the Next Generation Small Satellite-1 (NEXTsat-1), which will observe the thermal plasmas of the ionosphere, especially the plasma irregularities in the low and the
middle latituderegions. A SPD consists of a disk-type
Langmuir Probe(LP), a
Retarding PotentialAnalyzer (RPA), and an Ion
Drift Meter(IDM), which will measure the electron densities and temperatures, the ion densities and temperatures as well as the ion components, and the ion
drift velocities, respectively. Whereas SPD employ conventional designs, a high
cadenceof nominal 100 msec will enable us to study small-scale structures of irregularities, such as plasma bubbles and
blobs, with a spatial resolution of less than a kilometer at an altitude of ~ 575 km. Furthermore, the high-resolution mode of the LP operating at a 20 msec
cadencewill provide data on the electron density and temperature variations with an even better spatial resolution. The NEXTSat-1 is scheduled for launch in early 2018.
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