The Dutch Rubin Enhanced Atmospheric Monitor - DREAM

The Vera C. Rubin observatory will be performing numerous studies and high cadence surveys. In order to perform the surveys most efficiently, the observations need to be planned in an optimal way, taking into account numerous atmospheric effects such as the current weather conditions and cloud cover. Building on the heritage from the MASCARA station, the DREAM team is developing the cloud & transmission monitoring system. The DREAM station is an upgraded version of the MASCARA station, which has been already been successfully operational on La Palma, Canary Islands, Spain, and La Silla, Chile. Using a set of wide-field cameras, nearly the full local sky is imaged every 6.4 seconds. Using calibrated brightness measurements of all bright stars (V < 8.4) in the field of view, the transmission and extinction is monitored, at a 30-60 seconds cadence. DREAM is currently being assembled and tested in the Netherlands and is expected to be deployed on-site by the end of 2022.