On 31 October 2020, anonymous ftp access will officially be discontinued at CDDIS. Beginning July 1, 2020, CDDIS will bandwidth limit ALL IPs using anonymous ftp to just 1MB/s transfer rates. CDDIS is STRONGLY recommending all users begin to transition to using alternate method of access to the CDDIS archive. Examples of alternate methods can be found at: https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html.

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News in 2008

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.

Poster Presentations at the 16th International Workshop on Laser Ranging (13-Oct-2008)

Several posters were presentated at the 16th International Worskshop on Laser Ranging in Poznan Poland, Oct. 13-17, 2008:

  • C. Noll, "SLR, GNSS, VLBI and DORIS Networks: ILRS+IGS+IVS+IDS" (PDF poster | 5 Mbytes), at 16th International Workshop on Laser Ranging, Poznan, Poland, October 2008.
  • C. Noll, "Satellite Laser Ranging Tracking through the Years" (PDF poster | 3.7 Mbytes), at 16th International Workshop on Laser Ranging, Poznan, Poland, October 2008.
  • C. Noll, M. Torrence, "ILRS Web Site Update" (PDF poster | 4 Mbytes), at 16th International Workshop on Laser Ranging, Poznan, Poland, October 2008.

DAAC Annual Article Featuring CDDIS Data Published (28-Jul-2008)

Pinning down Earth's Crust by the Minute A feature article has recently been published discussing the use of high-rate GNSS data (available through the CDDIS) in crustal motion studies, particularly research conducted by Kristine Larson of the University of Colorado. The article is part of the 2008 issue of Sensing Our Planet: NASA Earth Science Research Feature, an annual publication of the Earth Observing System Data and Information System (EOSDIS).

GNSS Data from NGA Sites (22-Jul-2008)

The CDDIS has made GPS data available from 11 stations in the National Geospatial-Intelligence Agency (NGA) global network. These stations are a major component of the operational GPS tracking network, which will allow a closer alignment of the WGS 84 and ITRF frames. These data span 1999 through the present from the following sites:

Monument Names
Site Location
ade1, ade2
Adelaide, Australia
bue1, bue2
Buenos Aires, Argentina
hrm1, hrm2
Hermitage, UK
bhr1, bhr2
qui1, qui2
Quito, Ecuador
wdc1, wdc2 / wdc3, wdc4
USNO, Washington, DC
eil1, eil2
Eielson, Alaska, USA
wel1, wel2
Wellington, New Zealand
pre1, pre2
Pretoria, South Africa
osn1, osn2
Osan, Korea
tah1, tah2
Tahiti, Polynesia

More information describing these sites can be found in a recent IGSMail message from NGA.

2005/2006 ILRS Report Published (01-Dec-2007)

The 2005/2006 ILRS Report has been distributed in hardcopy form. An on-line version can be viewed through the ILRS Web site (http://ilrs.gsfc.nasa.gov/reports/ilrs_reports/ilrsreport_2005.html).

New Sponsor for CDDIS at NASA HQ (01-Oct-2007)

In October 2007, Martha Maiden of the Science Mission Directorate at NASA HQ, announced that funding for the CDDIS will be transferred from the Solid Earth Research Program into the Earth Science Data Systems Core Program, managed through the ESDIS Project. This move will afford an opportunity for creating and integrating metadata representative of CDDIS data and products into the NASA ECHO and GCMD systems. John LaBrecque will continue as the Program Scientist for the CDDIS.