NOUS41 KWBC 021945 AAA
Technical Implementation Notice 15-49: Updated
National Weather Service Headquarters Washington DC
345 PM EST Thu Feb 2 2017
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
Other NWS Partners and Employees
From: Terrance J. Clark
Director, WSR-88D Radar Operations Center
Subject: Updated: WSR-88D Volume Coverage Pattern Changes
tentatively scheduled to deploy in Mid-October 2017
Amended scheduled deployment date to mid-October 2017.
In WSR-88D Radar Data Acquisition (RDA)/Radar Product Generation
(RPG) Software Build 18.0, 4 current Volume Coverage Patterns
(VCPs) will be eliminated. These VCPs are 11, 211, 21 and 221.
They will be replaced with a new pattern, VCP 215. VCPs 12, 212,
121, 31 and 32 will remain in the system. Build 18.0 Beta Test
is tentatively scheduled for mid-October 2017, with full
deployment following during the winter.
VCP 215 will include the same elevation angles as VCPs 12/212
below 10 degrees, and the same angles as VCPs 11/211 above
10 degrees. The data quality will be comparable to VCP 21, and
the completion time of VCP 215 will be approximately 6 minutes.
AVSET and one SAILS cut will be operator selectable with VCP
215. VCP 215 will be ideal for general weather surveillance and
during light precipitation events.
In addition, another new VCP will be introduced for use during
clear-air or winter precipitation. VCP 35 will include the same
elevation angles up to 6.4 degrees as those used by VCPs
12/212/215. VCP 35 will complete in approximately 7 minutes and
one SAILS cut will be operator selectable.
These VCPs share a common set of elevation angles with severe
weather VCPs 12/212, increase the elevation coverage over the
current suite of routine surveillance patterns, and provide SZ-2
Doppler processing for the split cut elevations.
More information on the VCP changes is available:
Sample data sets of VCP 35 and VCP 215 are available on the
Radar Operations Center's New Technologies website:
For more information, contact:
NWS Radar Focal Point
Radar Operations Center
National Public Information Statements are online at: