[tet68]

I wonder what altitude it was orbiting?
Could it have been a LEO and it was able to boost
itself up as the orbit decayed, allowing longer
closer observation of earth?

At least some security is being held, anyway.

[Rio]

I wonder what altitude it was orbiting?

The orbit data is extracted from the following two-line orbital elements,

1 39025U 12071A   14106.35626708 0.00000000  00000-0  00000-0 0    02
2 39025  43.5052 134.6527 0017808 302.3985  57.6010 15.57790517    08

Epoch (UTC):	16 April 2014 08:33:01
Eccentricity:	0.0017808
inclination:	43.5052°
perigee height:	382 km
apogee height:	406 km
right ascension of ascending node:	134.6527°
argument of perigee:	302.3985°
revolutions per day:	15.57790517
mean anomaly at epoch:	57.6010°

http://www.heavens-above.com/orbit.aspx?satid=39025

That's in the same neighborhood as ISS, I think.

[Jacquerie]

Its in the article.