CDDIS Near Real Time Data for Geodesy Based Applications

Thursday, 18 December 2014
Benjamin P Michael, Carey E Noll and James Roark, NASA Goddard Space Flight Center, Code 690.1, Greenbelt, MD, United States
The Crustal Dynamics Data Information System (CDDIS) is one of NASA’s Earth Observing System Data and Information System (EOSDIS) distributed data centers and as such is tasked to provide facilities for search and access of science data and products for a diverse user community. The archive consists of Global Navigation Satellite Systems (GNSS), laser ranging, Very Long Baseline Interferometry (VLBI), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) data sets and products derived from these data.  With these data sets and products the CDDIS and its archive are a key component in several of the operational services within the International Association of Geodesy (IAG) and its project the Global Geodetic Observing System (GGOS) and the International GNSS Service (IGS). In the spring of 2013, the IGS officially launched its Real Time Service (RTS) to provide support for applications requiring real time access to IGS products. The IGS RTS is a GNSS orbit and clock correction service that enables precise point positioning (PPP) and related applications, such as time synchronization and disaster monitoring. The service is based on a global infrastructure of network stations, data centers and analysis centers that provide high precision GNSS products and is operated as a public service. The CDDIS has decided to join the RTS infrastructure and take part in disseminating GNSS data and products through the RTS. This poster will include information about the CDDIS real time implementation, how it fits into the RTS infrastructure, the user registration process, and computation and conversion of data feeds into high-rate data files for both near real time and offline usage.