High precision control of sparse array telescope technology has the potential to revolutionize the field of remote sensing by offering as yet unachieved performance, while simultaneously dramatically reducing cost. Sparse array technology can achieve these goals because improvements in resolution obtained from larger effective apertures can be traded with payload size and weight. As a result, a smaller number of satellites, hence smaller and significantly cheaper launch vehicles can be used to accomplish a given mission. The Low Cost Space Imager (LCSI) uses advanced actuator and computer technology coupled with demonstrated tracking technology to successfully phase the multi-aperture system. The primary objective of the LCSI is two-fold. FIRST: to develop a flight sparse multi-aperture telescope conceptual design that meets the UltraLight mission requirements and also results in a set of alignment tolerances that are achievable under closed loop control. SECOND: to demonstrate, in a laboratory environment, the ability to perform closed loop control to within the error tolerances consistent with the first objective. This objective is to be met with a sparse aperture telescope mounted on a representative structural platform. Phasing a sparse aperture telescope involves coarse and fine positioning control. Unlike the predecessor experiment, Low Cost Space Structure (LCSS) where only fine control was demonstrated, the LCSI testbed will demonstrate the coarse control aspects as well. A key demonstration will be the process for piston white light fringe acquisition and coarse track.
Keywords: BALANCE BIREFRINGENT TRANSDUCERS ROBOTIC SENSOR MULTIAXIAL ACCELEROMETER BIREFRINGENT SENSORS
