VLBI Daily Intensive Solution Product (DSNI)

doi: 10.5067/VLBI/VLBI_daily_int_soln_001

Data Center Citation

Noll, Carey E., The Crustal Dynamics Data Information System: A resource to support scientific analysis using space geodesy, Advances in Space Research, Volume 45, Issue 12, 15 June 2010, Pages 1421-1440, ISSN 0273-1177, http://dx.doi.org/10.1016/j.asr.2010.01.018.

Data Citation

International VLBI Service for Geodesy and Astrometry (IVS) VLBI Daily Intensive Solution Product (DSNI) [online]. Available from the NASA Crustal Dynamics Data Information System DAAC, Greenbelt, MD, USA at: http://dx.doi.org/10.5067/VLBI/VLBI_daily_int_soln_001, Accessed [[enter user data access date]].

Other standard citation formats may be used for this data set and can be found at the DOI Citation Formatter website.

More information about CDDIS data citations and acknowledgments is available.


  • Name: VLBI Daily Intensive Solution Product (DSNI) available from the Crustal Dynamics Data Information System (CDDIS)
  • Format: SINEX
  • Spatial Coverage: 90.0N to -90.0S, 180.0E to -180.0W
  • Temporal Coverage: 2007-08-28 to 2023-12-05
  • Temporal Resolution: daily
  • File Size: Up to 20 KB
  • Platforms:


The daily Intensive solution files in SINEX format are analysis products that are mainly designed for combination, for both within the IVS and with other space techniques, since they contain datum-free normal equations (decomposed normal equations). Secondly, they allow to estimate UT1 for each 1-hour Intensive session applying a selected datum. Thirdly, the files contain estimates for all parameters (site positions, polar motion, UT1-TAI, and LOD), but these parameters, except UT1-TAI, have been tightly constrained to a priori values. The files are in SINEX format providing also the covariance matrix of the estimates. The SINEX product files are available on the same frequency as the EOP-I products: 24 hours after each new session data base is available.

Data Access

The VLBI Daily Intensive Solution Product (DSNI) files are online:

in subdirectories as follows:


Code Meaning
AAA3-character analysis center
IIIIIIIII 9-character input database
gz gzip compressed file