The purpose of this page of the CDDIS web site is to post new items, activities, data sets, etc. of interest to the CDDIS user community. Users should also consult the list of upcoming meetings of interest to the space geodesy community.
DAAC Annual Article Featuring CDDIS Data Published (13-Dec-2012)
A feature article, "Where on Earth.", has recently been published detailing research in determing precise positions on the Earth using technologies such as GPS, SLR, VLBI, and DORIS. The article is part of the 2012 issue of Sensing Our Planet: NASA Earth Science Research Feature, an annual publication of the Earth Observing System Data and Information System (EOSDIS).
Solid Earth Science ESDR System (SESES) data available in CDDIS (29-Nov-2012):
The CDDIS has been designated as the EOSDIS DAAC for one Making Earth System Data Records for Use in Research Environments (MEaSUREs) project, the Solid Earth Science ESDR System (SESES), a collaborative activity between JPL and SIO. The products archived at the CDDIS are time series of geodetic station positions, velocity fields, strain and strain rate, and time series offsets. Weekly updates are issued by the project. In addition, the project has developed the GPS Explorer data portal, which provides tools to access and explore these GPS data products. The CDDIS provides ftp-only access to products. Related links:
- CDDIS archive location: ftp://cddis.gsfc.nasa.gov/pub/GPS_Explorer/
- GPS Explorer portal: http://geoapp.ucsd.edu
- JPL timeseries information: https://gipsy-oasis.jpl.nasa.gov/index.php?page=pppdata
- SIO/SOPAC information: http://sopac.ucsd.edu
New ILRS Website (03-Oct-2012):
The ILRS Central Bureau is pleased to announce the implementation of a new ILRS website, http://ilrs.gsfc.nasa.gov . This new website has allowed for a review of the organization of the site and its contents, ensuring information is current and useful. Comments and suggestions are welcome and should be directed to the ILRS web team at email@example.com. We would like to acknowledge the efforts of the website development team (Lisa Lee, Mark Torrence, Lori Tyahla, and Carey Noll) as well as members of the Central Bureau and the ILRS community for their contributions to the site content.
NASA Earth Science Data and Services Survey for 2012 (30-Aug-2012):
In the next few days, you will receive an email from CFI Group on behalf of NASA. This message will ask you to complete a survey of users of NASA Earth science data and services, which includes the Crustal Dynamics Data Information System (CDDIS). The purpose of this survey is to help NASA and the data centers assess customer satisfaction and improve future services.
The American Customer Satisfaction Index (ACSI) is the #1 national economic indicator of customer satisfaction. Over 70 U.S. Federal Government agencies have used the ACSI to measure more than 120 programs/services. The survey is being conducted by CFI Group under contract with the Department of Interior's Federal Consulting Group, Executive Agent in government for the ACSI. Please consider responding to this survey; your input will help us to better serve our user community.
Results from the 2011 survey are available online at http://www.theacsi.org/ (under ACSI RESULTS > Government Results Archive). In addition, presentations on these results given by NASA
Earth science are available at: http://earthdata.nasa.gov/about-eosdis/performance.
Thank you in advance to all of you who are willing to spend a few minutes to complete the survey.
Posters Presented at 2012 IGS Workshop (23-Jul-2012):
Two posters were presented at the 2012 IGS Workshop held in Olsztyn, Poland, July 23-27:
- C. Noll, P. Michael, M. Dube, N. Pollack . "An Update on the CDDIS", 2012 IGS Analysis Workshop, Olsztyn, Poland, July 2012.
- S. Desai, R. Gross, L. Hilliard, F. Lemoine, J. Long, C. Ma, J. McGarry, S. Merkowitz, D. Murphy, C. Noll, E. Pavlis, M. Pearlman, D. Stowers, F. Webb. "NASA's Next Generation Space Geodesy Network", 2012 IGS Analysis Workshop, Olsztyn, Poland, July 2012.
CDDIS Logo Designed (01-Jun-2012):
The CDDIS has recently created a revised logo.
New CDDIS Servers Coming Online May 09, 2012 (02-May-2012):
The CDDIS archive will be unavailable on May 09 starting at 08:00 EST (12:00 UTC) for approximately 10 hours (however, as we all know, unforeseen problems could cause a longer outage). At that time, the system will be shut down in preparation for operations to transition to our new systems. When the new systems are operational, users will continue to access host cddis.gsfc.nasa.gov through anonymous ftp and http and see the same archive structure. Groups who submit data and products to CDDIS will also continue to push files to the same host, cddisin.gsfc.nasa.gov. We expect to bring up systems at different times. We plan to be able to accept files pushed to host cddisin.gsfc.nasa.gov relatively quickly; however processing of these files to the archive will not be performed until all services are operational.
While the CDDIS is offline, users can access one of the other data centers supporting the services:
- IGS: http://www.igs.org/organization/centers.html
- ILRS: http://ilrs.gsfc.nasa.gov/data_and_products/data_centers/index.html
- IVS: http://ivscc.gsfc.nasa.gov/about/org/components/dc-list.html
- IDS: http://ids-doris.org/data-products/info.html
We hope for a smooth transition to our new computer systems on May 09. We will keep you posted as we implement the new systems and when our systems are able to accept files and to retrieve files from the archive. Please contact me if you have any questions.
CDDIS Supports IGS M-GEX (01-Feb-2012):
IThe CDDIS, a global data center of the International GNSS Service (IGS), is now supporting the IGS Multi-GNSS signals tracking campaign (IGS M-GEX). Following a successful proposal to the IGS M-GEX CfP, the CDDIS expanded its data archive and distribution service to include data from participating multi-GNSS receivers, products derived from the analysis of these data, and any required metadata for the experiment. The experiment aims to conduct a global multi-GNSS signals tracking campaign in parallel to established IGS operations, focusing on tracking newly available signals (e.g., Galileo, QZS, and Compass). IGS M-GEX will facilitate the collection of global tracking data that would allow a rigorous test of the capabilities of the IGS components to incorporate new systems and signals. The IGS M-GEX can also be viewed as a means of fostering increased participation and cooperation with international space agencies, research organizations, national mapping organizations, universities, and other organizations interested in high precision GNSS. The realization of these objectives will aid scientific research in many areas, particularly NASA research in geodesy and geophysics within the Solid Earth and Natural Hazards program and altimetry and sea level research programs. The CDDIS has participated in the IGS since 1990 and supported several IGS working groups and experiments.
DAAC Annual Article Featuring CDDIS Data Published (04-Jan-2012)
A feature article, "Looking for mud.", has recently been published discussing how scientists are using Earth science satellites such as GPS data available through the CDDIS to research soil moisture. The article is part of the 2011 issue of Sensing Our Planet: NASA Earth Science Research Feature, an annual publication of the Earth Observing System Data and Information System (EOSDIS).