National Oceanic and Atmospheric Administration, United States Department of Commerce

  • DMSP Data Users:
    Between 1993 August 12 and 1997 February 4, netCDF SSM/I TDR and SDR data have a mismatch between the observation time and geolocation values. This latency is in the order of 30 minutes. For daily gridded maps of radiances, this issue was found to be negligible but for time-dependent analysis, this probably will cause a problem. Corrective action is currently being undertaken to fix this issue.

  • Attention IASI Data Users:
    The format of the IASI Level 1C files will slightly change on 2010 March 15. Please click here to see the PDF containing the IASI L1C format with the updates.

  • Attention DMSP Data Users:
    Some channel data from the SSM/I instruments on DMSP F-13 and F-15 have been suspect since 2009 September. The problem is related to the repositioning of the solar arrays from +45 deg to 0 deg. Whenever this occurs, some effect to the data is noticed. Also, please note that due to the failure of the last recorder on F-13 the last day of data received from F-13 is 2009 November 19.

  • NETCDF DMSP SDR and TDR data now available in CLASS:
    Special Sensor Microwave Imager (SSM/I) Temperature Data Records (TDR) and Sensor Data Records (SDR) as netCDF 3-hourly files with quality flags are now available from July 1987 to near present. For more details on the QC procedures in each 3-hourly file and other improvements from the original data please click here.

      The Comprehensive Large Array-data Stewardship System (CLASS) is an electronic library of NOAA environmental data. This web site provides capabilities for finding and obtaining those data.