CDDIS – NASA’s Crustal Dynamics Data Information System
The CDDIS archives and distributes geodetic and space geodesy data, including GNSS, SLR, DORIS, and VLBI observations. It provides essential data products, such as precise satellite orbits, Earth orientation parameters, and atmospheric information, supporting research in geodynamics, Earth system monitoring, and reference frame realization. CDDIS serves as a critical hub for the global geodetic community.
More Info: https://www.earthdata.nasa.gov/centers/cddis-daac
