Workshop 2018
Sandra Blevins - Progress and improvements in real-time services at NASA GSFC CDDIS - October 29, 2018 • 537 Views
The Crustal Dynamics Data Information System (CDDIS) is a NASA distributed active archive center (DAAC) and global distributor of real-time GNSS data and product streams in support of the International GNSS Service (IGS) Real-Time Service (RTS) which provides high-accu- racy orbit and clock corrections to the GNSS community, enabling applications such as pre- cise point positioning, time synchronization, and disaster monitoring. The CDDIS NTRIP (Networked Transport of RTCM via Internet Protocol) caster is operated by the NASA God- dard Space Flight Center (GSFC) and broadcasts over 330 GNSS data and 37 products streams provided by a variety of international caster sources. The CDDIS is dedicated to continuous caster improvements and performance monitoring to provide reliable data and product streaming with help-desk supported accessibility to the global community. The Bundesamt für Kartographie und Geodäsie (BKG) NTRIP Client (BNC) is used to collect performance metrics, such as mean latencies with uncertainties and epochs, for each CDDIS caster stream, and will be used to capture and convert real-time streams into high-rate (15 minute observations with 1-second sampling rate) files. Captured and con- verted real-time stream files, and performance metrics with associated measurements will be archived and made available to the IGS and greater GNSS community. Ongoing improve- ments to the CDDIS NTRIP caster, methods used in real-time performance metrics analytics, anticipated challenges, and future work will be discussed.

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