PDS Archive

The LROC Planetary Data System archive is divided into three sections: Engineering Data Records (EDRs) are images and their associated metadata, Calibrated Data Records (CDRs) are EDRs that have been decompanded and calibrated, and Reduced Data Records (RDRs) that can be made from as few as one image or as many as thousands that are processed and reduced for the purpose of, for example, making a mosaic that combines multiple images of a particular area or feature, or a high resolution global digital elevation model created with stereo observations. LROC has been releasing data to PDS quarterly since 2009, soon after the project began. In October 2018, EDRs and CDRs were switched to monthly releases while RDRs continue to be released quarterly.