Temperature profile YES2

Above graph plots the temperature of the XBOX and the OLD (tether core) vs. time and the various mission events. Initial temperatures are around freezing point. Self-heating takes care of almost all temperature change. The additional 6W heater inside the XBOX shuts off by thermostat after about one hour. Little effect of mission phase or even MASS/Fotino ejection (YTK2) can be seen, nor is there much effect of eclipse (approximately indicated with grey zones), as YES2 is pointed towards the Earth at this stage and MLI insulates the satellite. The change in temperature trend near the end of the mission (after YTK3) may be related to the reorientation of the Foton spacecraft along the velocity vector.