Gareth Thomas is a Senior Remote Sensing Scientist at RAL Space. He has over 10 years’ experience in the remote sensing of aerosol and cloud properties from satellites. His primary role in the Remote Sensing Group is the development and exploitation of algorithms to determine the properties of atmospheric aerosols from visible/infrared imaging instruments, using the ORAC retrieval scheme. He is also responsible for the production of large-scale datasets using these algorithms for climate monitoring (through the ESA Climate Change Initiative programme for example), air quality and regional environmental monitoring. He will support to fit-for-purpose exercise and the uncertainty characterisation as data provider for the ORAC algorithm. He will also provide scientific support throughout the duration of the SATACI project.