“…They provide additional functions and features to an OCM system: some techniques are essential to ensure proper system performance such as the detection of dim target [51] or tracking sensors [52], some methods provide new functionalities to the system using laser-based sensors [53], e. g. for time-of-flight profiling [54], laser detection and ranging [55] or detection of polarization anomalies [56]. Field trials [22,41,57], IRCM spectral signature measurements [58], or laser safety analyses for DIRCM systems [59] are further examples of supporting activities.…”