The Crustal Dynamics Data Information System (CDDIS) has served as a global
data center for the International GPS Service (IGS) since its start in Jun
e 1992, providing on-line access to data from over 175 sites on a daily bas
is. This paper will present information about the GPS and GLONASS data and
products archive at the CDDIS. General information about the system and its
support of other international space geodesy services (the ILRS, IVS, IGLO
S-PP, and DPE) will also be discussed. (C) 2001 Elsevier Science Ltd. All r
ights reserved.