The following tutorial provides an introduction to analysis ready data (ARD) and atmospheric correction using ARCSI. The main datasets used for the tutorial are some Landsat 5 scenes, these are smaller in file size and therefore quicker to download. However, Sentinel-2 is also addressed and the modifications to the Landsat 5 commands provided as examples. This tutorial also provides information on using ARCSI to bulk download Landsat and Sentinel-2 using the Google Cloud tools. ARCSI also provides commands batch processing large numbers of scenes to ARD and this is briefly covered in this worksheet.