From the THEMIS Mission press release of June 7, 2007
"All stored science and engineering data are recovered regularly with a success rate of nearly 100% across the constellation. The THEMIS ground systems continue to function very well."
From the THEMIS orbits page:
Stage 1: Injection or “Coast” Phase
2/15/07 - 9/15/07
Right after launch all spacecraft are lined up in the same orbit with a 15.4 Re apogee.
Stage 2: Orbit Placement Phase
9/15/07 - 12/15/07
The orbit placement phase is also called “Dawn phase” because the apogee of the orbits are on the dawn side of the magnetosphere. Probe 1 apogee is at 30 Re, Probe 2 at 20 Re, Probes 3 and 4 at 12 Re, and Probe 5 at 10 Re.
Stage 3: Tail Science Phase
12/15/07 – 4/15/08
In the tail science phase the apogee of the orbits are in the magnetotail. Probe 1 apogee is at 30 Re, Probe 2 at 20 Re, Probes 3 and 4 at 12 Re, and Probe 5 at 10 Re.
See more at the THEMIS Mission Page
Check out the THEMIS mission video page for a NASA science briefing.