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Japan has successfully launched the Exploration of Energizing and Radiation in Geospace (ERG) spacecraft using an Epsilon-2 rocket:
Using an upgraded Epsilon rocket, Japan sent its Exploration of Energizing and Radiation in Geospace (ERG) spacecraft into a high-energy orbit that will repeatedly pass through the Van Allen belts to allow the probe to study how geomagnetic storms form. Liftoff from Kyushu Island took place at 8 p.m. Japan Standard Time (6 a.m. EST / 11:00 GMT) [on December 20th].
[...] [The spacecraft] carries with it nine instruments to study the radiation belts: XEP-e (Extremely high-energy electron sensor), HEP-e (High-energy particle sensor – electron), MEP-e (Medium-energy particle sensor – electron), LEP-e (Low-energy particle sensor – electro), MEP-i (Medium-energy particle – ion), LEP-i (Low-energy particle – ion), MGF (Magnetic Field Experiment), PWE (Plasma Wave Experiment), and S-WPIA (Software Wave-Particle Interaction Analyzer). The primary mission is expected to last for one year, with the possibility of an extension.
Reuters emphasizes the solid propellant used by the rocket:
The Epsilon-2 three-stage rocket is part of a new generation of solid propellant rockets and makes it possible for launch costs to be reduced up to one third, according to JAXA. Curbing costs for rocket launches is important as more emerging economies aim to put communication and weather satellites in space and Japan faces stiff competition with U.S. and European rivals such as Arianespace.
(Score: 1) by DmT on Thursday December 22 2016, @08:23AM
Do they study something new or does the mission overlap with some existing satellite's mission?
(Score: 2) by Rich on Thursday December 22 2016, @12:19PM
Quoting wikipedia for the most interesting new stuff: "The Epsilon is expected to have a shorter launch preparation time than its predecessors. [...] Due to a function called "mobile launch control", the rocket needs only eight people at the launch site.
And forget about the satellite, unless they use it to demonstrate precision re-entry, [iirc] like on one recent M-V launch :)
(Score: 1, Informative) by Anonymous Coward on Thursday December 22 2016, @06:51PM
They probably wont turn up anything new, but they are better understanding what is known to be there. For instance, we know what the environment of the South Atlantic Anomaly is like, but we don't understand a lot of its underlying mechanisms. This spacecraft will make dedicated measurements of this environment to try to understand it better.