Fascinating: "The Attitude Control System (ACS) began using the Star Tracking (STT) system data to control the position of the satellite. The STT at this point

Fascinating: "The Attitude Control System (ACS) began using the Star Tracking (STT) system data to control the position of the satellite. The STT at this point should have updated another position monitoring system, the Inertial Reference Unit (IRU). This may not have occurred. "...High energy particles may have disrupted the onboard electronics. "The STT and IRU disagreed on the attitude of the satellite. In this case the IRU takes priority, but its data apparently was wrong, reporting a rotation rate of 20 degrees per hour, which was not occurring. The satellite attempted to stop this erroneous rotation using reaction wheels. The satellite configuration information uploaded earlier was wrong and the reaction wheels made the spin worse. "The satellite now went into “Safe Hold” mode and thrusters were called upon to stop the rotation. Using the same erroneous configuration information they increased the spin further causing the satellite’s rotation to exceed design parameters."