NWS WSR-88D Level II Data Collection and Distribution Network Information
|     View the Current Levell II Data Flow from     NWS
||Download ARCHIVED Level II Data from NCDC NEXRAD Data Inventory
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What are Level II data?
Level II data are the digital radial base data (Reflectivity, Mean Radial Velocity, and
Spectrum Width) and Dual Polarization variables (Differential Reflectivity, Correlation
Coefficient, and Differential Phase) output from the signal processor in the Radar Data
Acquisition unit. The output also includes status information required to properly
interpret the data (e.g., information on synchronization, calibration, date, time,
antenna position, Nyquist velocity, and operational mode). Level II data are used for many
purposes including: support of operations, maintenance and developmental
activities at the ROC; activities directed toward algorithm and product
improvement; research by universities; and private sector uses/applications. The
Level II data are sent to the National Climatic Data Center by the NWS
WSR-88D Level II Central Collection, Distribution and Archive Network. Level II data are continuously
transmitted and archived from all DOC and select DoD and DOT WSR-88D systems and are available via
(http://www.ncdc.noaa.gov/nexradinv/choosesite.jsp). The interface control document describing
the Level II format (ICD For Archive II/User – Build 12.0) is available at: http://www.roc.noaa.gov/WSR88D/Program/ICDs.aspx.
Eight WSR-88D sites (remaining DoD CONUS sites) now scheduled to be added to the
NWS WSR-88D Level II Data Collection, Distribution, and Archive network 2013.