On Feb 17 and 18, ACE will participate in two extended contacts with the DSN
in order to execute the Z-axis lissajous control maneuvers. This activity will
trim the orbit and reset the Sun-ACE-Earth angle. The maneuvers are designed
to provide some significant annual fuel savings. During these contacts other
maintenance activities are planned include: instrument ramp downs and ramp
ups, RF reconfigurations, and solid state recorder (SSR) management.