http://www.isas.jaxa.jp/e/enterp/missions/astro-g/index.shtml

Altitude Perigee 1,000km, Apogee 25,000 km Inclination 31° Type of Orbit Highly elliptical Period Approx. 7 hr 30 min

That would sure be a good launch to have something with a transponder hitch a ride on.

73, Drew KO4MA