This document discusses the IUGONET plug-in software UDAS for the TDAS data analysis system. UDAS provides load procedures for various ground-based observational upper atmospheric data from institutions participating in the IUGONET project. Products released so far include a metadata database containing over 1.68 million records and the UDAS data analysis software. Future plans include incorporating UDAS into TDAS and releasing an executable version that can run on IDL Virtual Machine environments without an IDL license. The goal of IUGONET and these products is to effectively distribute, analyze and promote comprehensive studies using upper atmospheric data from the past 50+ years.