A Space-based Doppler Wind Lidar Simulation model (DLSM), Scatterometer Simulation Model (SCATTRSM) and Cloud Motion Wind Vector (CMWV) algorithm has been developed to provide simulated data products and corresponding errors to several Observing System Simulation Experiments ongoing at NASA and NOAA. These model studies include system performance models, state-of-the-art numerical weather prediction models (Nature Run) and atmospheric optical property models. The characterization of opaque, cirrus and sub-visual cirrus cloud fields, wind variance, precipitation, and aerosol optical properties is very important in such studies and are the challenging issues to providing realistic measurement representations. This paper presents the operational simulation models and their current support for spaced-based platform missions.