NONLINEAR PERFORMANCE ANALYSIS OF DARWIN WITH RESPECT TO FORMATION FLYING FINE CONTROL LOOPS

摘要

The measurement principle underlying the DARWINrnnulling science mode is essentially nonlinear. On thernone hand in terms of null depth as a function ofrnamplitude and phase noise, and on the other hand inrnterms of fiber coupling as function of science beamrnpointing and lateral offset. We present a performancernbreakdown and an end-to-end performance simulationrnfor DARWIN with focus on principal limitations, andrnwith a clear distinction between static null depthrncontributors, dynamic error contributors, and so-calledrninstability noise within the overall system. Wernadditionally discuss the derived next-step developmentrnefforts for critical subsystems.