SSC 4D Orbit Viewer Web Services API at the Space Physics Data Facility (SPDF)
This API allows any web application to offer an interactive 4D display of the trajectories of satellites known to SSCweb (Satellite Situation Center). The Space Physics Data Facility (SPDF) is the archive of non-solar data for the Heliospheric Science Division (HSD) at NASA's Goddard Space Flight Center.