The Product Definition Document (PDD) is the place for defining the products indicated in the Product and Algorithm Requirement Document [PARD]. The information in this document for the scope of the Casper activity shall be understood as a high-level set of descriptions. The scope of this document is exclusively related with L2 products, within CASPER called generically either L2a or L2b.
DP Donovan, GJ van Zadelhoff, et al.. CASPER Product Definition Document (PDD)
2008, Deimos Space S.L., 2008