While Kron 6 mission is underway, Wernher von Kerman came to an excellent idea to get some actual data on the van Kallen belts that surround Kerbin and possibly, probe the other belts of other planetary bodies. It's something that was supposed to be done a lot earlier, but nobody thought about it. Except maybe for Linus Kerman, but nobody listens to him, anyway.
Thus, OGRE program was born. OGRE stands for Orbital Global Radiation Evaluation.
The probes will be equipped with a Geiger-Müller counter and will be carried into orbit by a two stage rocket (SRB and liquid bipropellant engine). Optionally, third stage will be either liquid bipropellant, or xenon when more distant bodies become the next target.
Aditionally, currently travelling Kron 6 will determine those properties at Plock system, and flung out Kaos 3 will measure the radiation doses at and beyond the magnetosphere after quite a few years.
The probe is being built at the moment.