(JP2001018899-A)   NOVELTY - A solar array control (13) generates array position data indicative of the rotational adjustment of the array required to align the array perpendicular to the sun. A solar array actuator (14) is connected to the array to drive the array in rotation about its axis in accordance with the array adjustment data from the solar array control.    USE - As a supplement of chemical propulsion in orbital and attitude control of satellites for certain applications, such as attitude and station-keeping control. In orbit adjustment from insertion to operating orbit through a series of transition orbits.    ADVANTAGE - Reduce the operation of the chemical thrusters with savings in mass and allows the chemical thruster system to be used for other maneuvers or allows a reduction in fuel. The mass savings could provide space for additional payload or could be used to extend the on orbit fuel lifetime of the satellite. Optimizes thrust efficiency for optimum thrust vector direction at all times while allowing for orientation of the solar array for maximum power generation.    (US6186446-B1)   NOVELTY - A solar array control (13) generates array position data indicative of the rotational adjustment of the array required to align the array perpendicular to the sun. A solar array actuator (14) is connected to the array to drive the array in rotation about its axis in accordance with the array adjustment data from the solar array control.    USE - As a supplement of chemical propulsion in orbital and attitude control of satellites for certain applications, such as attitude and station-keeping control. In orbit adjustment from insertion to operating orbit through a series of transition orbits.    ADVANTAGE - Reduce the operation of the chemical thrusters with savings in mass and allows the chemical thruster system to be used for other maneuvers or allows a reduction in fuel. The mass savings could provide space for additional payload or could be used to extend the on orbit fuel lifetime of the satellite. Optimizes thrust efficiency for optimum thrust vector direction at all times while allowing for orientation of the solar array for maximum power generation.