In addition to the supply of products from its core comprehensive global data assimilation and forecasting system, MACC also supplies a set of products that provide continuity of the ozone service provided previously by PROMOTE. These comprise the stratospheric ozone record and near-real-time service using the SACADA 4D-Var system of DLR and FRIUUK, the stratospheric ozone record and near-real-time service using the BASCOE 4D-Var system of BIRA/IASB, and the total ozone record, monitoring and forecasting service by the TM3DAM Kalman-filter approach of KNMI. The PROMOTE specification for these services is available here.