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The NASA CDDIS has another year of record growth in 2017

01.18.2018

The Crustal Dynamics Data Information System (CDDIS) had another year of record growth with 1.7B file downloads (206TB) of data transferred to over 260K unique users in 2017. EOSDIS (Earth Observing System Data and Information System) reports that CDDIS led the twelve Distributed Active Archive (DAACs) in the number of files downloaded last year. Furthermore, CDDIS GNSS (Global Navigation Satellite System) data/products accounted for three of the top data sets distributed by EOSDIS.


- The CDDIS now provides GNSS real-time streams from over 330 global sites as well as nearly 40 real-time product streams to the public through the NTRIP (Networked Transport of RTCM via Internet Protocol) real-time caster. These data streams include 38 NASA GDGPS (Global Differential GPS) sites as well as 31 sites provided by the University of Chile for testing in support of the READI (Real-time Earthquake Analysis for Disaster Mitigation) initiative.


- In December 2016, CDDIS installed an extensive system upgrade using virtual machine architecture for reliability and expandability, providing better infrastructure (power, network connectivity) and increased storage capability. A streamlined archive operations architecture and data upload process were also implemented.

NASA Takes Next Step for a New VGOS Antenna in Texas

09.25.2017
Aerial View of McDonald Geodetic Observatory in Fort Davis Texas, showing locations of the new VLBI and SLR stations
"Aerial view of the proposed locations for the VLBi and SLR instruments at McDonald Observatory, Fort Davis, Texas. The SLR site is located on Mt. Fowlkes, at an elevation of 2027.4 m; the VLBI instrument will be in the valley at an elevation of 1906.1 m. A distance of 827.3 m will separate the two geodetic instruments."

The NASA Space Geodesy Project (SGP) is taking the next step in expanding the NASA Space Geodesy Network (NSGN) with the procurement of a VLBI Global Observing System (VGOS) 12-m radio telescope for a new core site to be located at the McDonald Observatory, near Fort Davis, Texas. NASA recently awarded a contract to InterTronics Solutions, Inc for a 12-m VGOS radio telescope to be installed in the Fall of 2018. The proposed McDonald Geodetic Observatory (MGO) is being developed by NASA and the University of Texas-Austin Center for Space Research and will be hosted by the University of Texas McDonald Observatory. MGO will also include the NASA next-generation Satellite Laser Ranging (SLR) system and permanent GNSS receivers. The MGO VGOS station will be the fourth broadband-capable station in the NASA network, which now includes Kokee Park (Hawaii), the Goddard Geophysical and Astronomical Observatory (GGAO, Greenbelt, Maryland), and the Haystack Observatory (Westford, Massachusetts).

Contact Jim Long (James.L.Long@nasa.gov) for more information.

Correlated Atmosphere Noise in VLBI Analysis

09.21.2017
Hana Krásná (TU Wien) made a presentation at the IAG meeting in Kobe, Japan: ''Correlated Atmosphere Noise in VLBI Analysis'', by Hana Krásná and John Gipson (NVI @ NASA GSFC, Code 61A) . She demonstrated that modeling station dependent measurement noise in the VieVs VLBI analysis software improves the repeatability of station positions and the agreement between VLBI and GPS determinations of Polar Motion. John Gipson had demonstrated the same effect in Solve, the Goddard VLBI software, in 2007, but the new study provides the first independent verification.

Contact John Gipson (John.M.Gipson@nasa.gov) for more information.

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Overview

The laboratory performs broad research, in the areas of Earth time variable and static geopotential and geomagnetic fields, Earth orientation, surface deformation, characterization and change, tides, land ice mass evolution, global and regional sea level, and airborne and spaceborne laser altimetry. The laboratory also supports many NASA missions in fundamental and core capabilities including satellite radar and laser altimetry precise positioning, pointing, ranging, timing, geolocation and calibration and validation. The laboratory is a leader in the design, development, implementation and application of airborne and spaceborne geodetic laser altimeter technology and instruments including NASA’s Land, Vegetation, and Ice Sensor (LVIS) and the Global Ecosystem Dynamics Investigation Lidar (GEDI). The laboratory is the home of the Space Geodesy Project which encompasses the management, development, operation and maintenance of NASA’s Space Geodetic Network that is comprised of the four major space geodetic observing systems: Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), Global Navigation Satellite System (GNSS), and the Doppler Orbitography and Radio-positioning by integrated Satellite (DORIS) system. It is also home to the Crustal Dynamics Data Information System dedicated to the archive and distribution of space geodesy related data sets; as well as the home to GEODYN, NASA’s state-of-the-art geodetic parameter estimation and precision orbit determination system.

Contact Us

Scott B Luthcke
301.614.6112
Chief [61A]
Terence John Sabaka
301.614.6493

General inquiries about the scientific programs at NASA's Goddard Space Flight Center may be directed to the Center Office of Communications at 1.301.286.8955.

                                                                                                                                                                                        
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