Message 31 Information for Level 2 users

Additional information about Build 10 WSR-88D is available from the NWS Radar Operations Center at:

http://www.roc.noaa.gov/NWS_Level_2/BuildInfo/b10main.aspx

This page includes a copy of relevant public announcements, a list of FAQ's, a summary of changes relevant to users of Level 2 data, the formal Interface Control Document describing the new message 31 format, and a source of Level 2 data in message 31 format.

The ROC site ALSO includes pseudo code for the recombination algorithm. This algorithm takes the higher resolution base data radial available in a Build 10 data stream and converts it back to the Legacy resolution (0.5 deg radials back to 1.0 deg; 250 m reflectivity resolution to 1000 m; and 300 km Doppler range to 230 km Doppler range). A version of this algorithm is implemented in the ORPG source code in the ~/src/cpc004/tsk009 directory.

The ORPG source code also includes the process base data algorithms and the velocity dealiasing algorithms. Process base data is the higher level task that converts message 31 and message 1 external data message into the ORPG internal base data message. It is located in the ~/src/cpc004/tsk002 directory. Velocity dealiasing source code is in the ~/src/cpc004/tsk001 directory.

Please note that all descriptions of base data messages within the CODE documentation pertain to the ORPG internal format, not the external message 31 format. Document 2620002 - The RDA/RPG ICD describes the format for all external messages including message 31 and the current message 1 data messages.