New FAQ (30-Nov-00)

A new Frequently Asked Questions (FAQ) list has been created and made available through the CDDIS web site. Users are encouraged to check this list for popular questions. Of course, questions not found there should be directed to the CDDIS manager.

CDDIS Web Site Gets Face-Lift (21-Nov-00)

A new version of the CDDIS web site has been installed. The new site no longer uses frames for navigation. Comments to the CDDIS manager on the new site are welcome.

Secure Access to CDDIS (15-Oct-00)

Users who access the CDDIS and transfer files to host cddisa.gsfc.nasa.gov will soon be required to use secure shell (ssh) and secure copy (scp) instead of telnet and ftp respectively. This is a NASA and GSFC requirement to help ensure our computer and network security on center. In the near future, ftp access, with the exception of anonymous ftp of course, will be disabled on host cddisa.gsfc.nasa.gov; telnet access has already been disabled. The CDDIS currently uses SSH1, Version 1.2.26. Questions should be directed to the CDDIS manager about using ssh and scp. The web site www.ssh.org also provides information on secure shell as do the UNIX man pages on sshd, ssh, scp, ssh-agent, ssh-add and ssh-keygen.

October 2000 Issue of CDDIS Bulletin is Available (18-Oct-00)

The October issue of the CDDIS Bulletin has been published and is available electronically. Articles include this issue of the CDDIS Bulletin are:

• Cover: IGLOS-PP Tracking Network (Current and Planned)
• Articles:
  • Data Holding Reports Available through the CDDIS
  • CDDIS Bulletin Volume 15 Index
• Data Bits and Bytes:
  • Hourly Laser Ranging Data Files Available through the CDDIS
  • Range Bias and Riga SLR Station
  • Permanet GPS and GLONASS Network Update

July 2000 Issue of CDDIS Bulletin is Available (07-Aug-00)

The July issue of the CDDIS Bulletin has been published and is available electronically. Articles include this issue of the CDDIS Bulletin are:

• Cover: ILRS Network
• Articles:
  • Data Holding Reports Available through the CDDIS
• Data Bits and Bytes:
  • Animations of the Geostationary Belt
  • Hourly GPS Data Files Avalable through the CDDIS
  • Permanet GPS and GLONASS Network Update

Recent Publications (15-May-2000)

The following papers have recently been submitted to various technical reports or published in meeting proceedings:

• "CDDIS Data Center Summary for the 1999 IVS Annual Report" (PDF), in 1999 IVS Annual Report
• "CDDIS ILRS 1999 Global Data Center Report" (PDF), in 1999 ILRS Annual Report
• "IGS Data Center Report" (PDF), in 1999 IGS Annual Report
• "CDDIS Global Data Center Report" (PDF), submitted to 1999 IGS Technical Reports
• "DORIS Data Center at the CDDIS" (PDF paper/presentation), in DORIS Days 2000, Toulouse, France, May 2000

April 2000 Issue of CDDIS Bulletin is Available (01-May-00)

The April issue of the CDDIS Bulletin has been published and is available electronically. Articles include this issue of the CDDIS Bulletin are:

• Cover: IGS Sites Providing Hourly Data to the CDDIS
• Articles:
  • TLRS-1 Eccentricity Problems
  • Recent Problems with the CDDIS Computer Facility
  • 1999 CDDIS Data Summaries
• Data Bits and Bytes:
  • Distribution of CDDIS Bulletin
  • Company Name Change
  • DORIS Data Available through the CDDIS
  • Permanet GPS and GLONASS Network Update

  

CDDIS Computer Facility Status (04-Jan-2000)

The CDDIS computer cddisa.gsfc.nasa.gov continues to be unavailable to the user community. As of Tuesday afternoon, the new version of the UNIX operating system has been installed. The system administration staff is now updating the software. The web and ftp sites are up and operational but have not been updated with recent data. Unfortunately, there appears to be a problem with one of the disk controllers. Support has been contacted and we hope to have someone look into this problem on Wednesday. In the meantime we will attempt to update the ftp site.