The Crustal Dynamics Data Information System (CDDIS) was initially developed to provide a central data bank for NASA's Crustal Dynamics Project (CDP). The Crustal Dynamics Data Information System (CDDIS) supports data archiving and distribution activities for the space geodesy and geodynamics community. The main objectives of the system are to store space geodesy and geodynamics related data products in a central data bank, to maintain information about the archival of these data, and to disseminate these data and information in a timely manner to NASA investigators and cooperating institutions.
ftp for uploading files will no longer be supported.Files are then submitted to CDDIS using an HTTP POST request (2017-17-05). - CDDIS is part of the ICSU World Data System (WDS). CDDIS is one of two data centers, which makes access possible of ILRS data, products, and predictions (and EDC). CDDIS contains the following data sets: GNSS Data, SLR Data, VLBI Data and DORIS Data.
The Crustal Dynamics Data Information System (CDDIS) has served as a global data center for the International GPS Service (IGS).