# Presentation: 927345

## WSR-88D Data

**Status And Plans**
- Michael Istok
- NWS Office of Science & Technology
-  and
- Tim Crum
- WSR-88D Radar Operations Center
- 18 June 2008
- National Weather Service
- Family Of Services/Partners Meeting
- Silver Spring, MD

- 6/18/08 FOS Meeting

## Overview

- WSR-88D Level II Data
- WSR-88D Level III Data
- WSR-88D Dual Polarization Modification Plans
- TDWR Data/Product Plans

- 6/18/08 FOS Meeting

## Level II Status

- 121 NWS, 13 DOD and 1 FAA Sites on the NWS Level II Network
- No funding available for additional connections
- Software Build 10 Deployment complete; installed at 90+ sites
- Level II data format changed from ”MSG 1”to “MSG 31”
- Needed for RDA to RPG Level II data transfer
- Enables larger Level II data sets to meet future requirements
- “Super Resolution” in “Split Cuts”
- Dual Polarization adds 3 moments
- Used for both Recombined and Super Resolution data transmission
- NWS sites (only) begin sending Super Resolution Level II data when their added bandwidth/NOAANet installed (completion by July)
- NOAANet will have higher reliability than comms links replaced
- No projected date when Super Resolution data will be sent from DOD  due to funding constraints
- NWS will provide advance notice when/if able to switch Level II data flow from DOD and FAA sites to Super Resolution

- 6/18/08 FOS Meeting

## Level II Data Beyond Build 10 Plans

- Build 11
- Deployment scheduled to begin in May 2009
- Clutter Mitigation Decision Algorithm added
- Automates and improves clutter removal (e.g., AP clutter)
- Should reduce use of ALL BINS clutter filtering
- Beyond Build 11
- Staggered Pulse Repetition Time, Phase 3;  improves velocity dealiasing; ultimately apply in all cuts at and above 1.8 deg
- Faster volume coverage patterns (e.g., Automated Volume Scan Evaluation & Termination Algorithm)
- Other  “point releases” possible to implement required security updates

- 6/18/08 FOS Meeting

## Level II Data Plans

- NWS beginning redesign work for Level II network
- No implementation date set
- Tentative plan to use two data aggregation points with 24/7 support available; improve data flow reliability
- Plan to continue to send data to top tier sites
- Use NOAANet
- Will keep top tier sites and Level II users updated on planning and implementation

- 6/18/08 FOS Meeting

## Level III Status and Plans

- Build 10
- Legacy Mesocyclone Algorithm and associated products, including Product #60, retained
- Digital Hybrid-Scan Reflectivity (DHR, Product #32) and Digital Storm Total Precipitation (DSP, Product #138) added to Central Collection/RPCCDS
- Build 11
- Severe Weather Probability Product (SWP, Product #47) will be deleted
- Beyond Build 11
- Selected algorithms may use Super Resolution Data; pending technical validation and development resources

- 6/18/08 FOS Meeting

## WSR-88D Dual Polarization Modification

- Beyond Build 10, no further Level II changes are planned until possible addition of 3 new Dual Pol moments to transmitted data stream
- Differential Reflectivity
- Differential Phase
- Correlation Coefficient
- Not Determined if Dual Pol Data Will be Added to Level II Data Collection And Distribution Network With Deployment
- Additional bandwidth required, preliminary estimate 768 kbps
- Bandwidth and total increase of data flow dependent on Dual Pol collection strategy implemented
- NWS goal to distribute Dual Pol Level II data, but depends on cost and funding availability

- 6/18/08 FOS Meeting

## WSR-88D Dual Polarization Modification(Continued)

- Beta Test scheduled to begin 2CY10; 2-year deployment scheduled to begin 4CY10
- NWS Evaluating which Dual Pol-unique products may be added to the Central Collection data stream
- Level II data collection and distribution uncertain due to funding

- 6/18/08 FOS Meeting

## TDWR Plans

- NWS connections to remaining 35 TDWRs scheduled by end of September 2008
- TDWR Level II data collection and distribution uncertain due to funding;
- Product Central Collection & Distribution planned for early 2009
- RPCCDS Broadcast
- Added to 10 second radar product bundles
- Mix of WSR-88D RPG and TDWR SPG Products
- Central Server Level III Transmit/Receive Status Web Page
-  Radar FTP Server
- Products common to WSR-88D
- Under existing product directories and in own radar id directory
- New products (i.e., base products R/181, V/182, LR/186)
- New product name directories and in own radar id directory

- 6/18/08 FOS Meeting

## TDWR Level III PlansTDWR SPG Product Collection

- 6/18/08 FOS Meeting

## TDWR Level III Plans TDWR SPG IDs, Sending WFOs, FTP dir names

- 6/18/08 FOS Meeting

## TDWR Level III PlansProduct Throughput per Radar

- 6/18/08 FOS Meeting

## TDWR Level III PlansImplementation and Impacts

- To evaluate the impact on communications and data storage systems, implementation will be phased and evaluated by those responsible for respective systems.
- The phases and planned start dates are:
- October 2008: AWIPS OB9 beta test (1 – 3 sites),
- January 2009: AWIPS OB9 Deployment (up to 15 sites),
- March 2009: AWIPS OB9 Deployment (up to 30 sites),
- June 2009: Full Implementation (45 sites).
- May 14-28, 2008 tbwi ranged from 4 to 16 kbps (average 8.5 kbps).
- High utilization can occur during clear air since the short-range high-res TDWR radar products tend to be full and have high texture.
- Products are zlib compressed before being put on the SBN, so the total SBN load of 45 radars is estimated to be below 225 kbps

- 6/18/08 FOS Meeting

## Additional Information

- Project updates and other Level II information:
- http://www.roc.noaa.gov/NWS_Level_2
- NWS Real-Time WSR-88D Transmit/Receive Status:
-  http://weather.noaa.gov/monitor/radar/
- NWS Real-Time Level II Data Monitoring Site:
- http://weather.noaa.gov/monitor/radar2/
- WSR-88D Software/Program updates for product users:
- http://www.nws.noaa.gov/tg/rpccds.html
- Build specific training materials:
- http://www.wdtb.noaa.gov/

- 6/18/08 FOS Meeting

## Additional Information(Continued)

- NCDC Radar Resources: Order Level II and Level III Archive Data Via FTP, Use NCDC Java Viewer to View Level II and Level III Archive Data, etc.
- http://www.ncdc.noaa.gov/oa/radar/radarresources.html
- Run RPG Software, LINUX Platform: The Common Operations and Development Environment (CODE)
- http://www.weather.gov/CODE88D
- Federal Meteorological Handbook No. 11 (FMH-11) Part A Updated for Build 10 will be available electronically in July
- http://www.ofcm.gov/homepage/text/pubs.htm
- Follow-up questions to: Michael.Istok@noaa.gov or Tim.D.Crum@noaa.gov

- 6/18/08 FOS Meeting

## TDWR Level III Plans – Backup SlideTDWR System Overview

- TDWR Level III Plans – Backup SlideTDWR System Overview

- 6/18/08 FOS Meeting

## TDWR Level III Plans – Backup Slide Differences from WSR-88D

- TDWR is C-band
- Significant Attenuation at times
- More range and velocity folding
- Aggressive clutter filtering
- WSR-88D beamwidth is 1 degree, whereas TDWR is 1⁄2 degree
- TDWR computes radial data at 1 degree azimuths, but still vertically narrow
- Scan Strategies / Volume Coverage Patterns (VCP)
- TDWR scan strategy elevation angles are site specific
- Higher elevation angles and larger intervals between elevations
- SPG translates TDWR Hazardous and Monitor modes to VCP 80 and 90, respectively.  Both are 6 minutes in duration.
- Some elevations angles in VCP 80 repeat during the volume scan
- TDWR Spatial resolution and coverage area provided by SPG
- Long range surveillance scan is at 300m resolution to 225 nmi range
- All other elevations are at 150m resolution and extend to 45 nmi
- Product range is 45nmi, except for rainfall products, and long range base Refl
- SPG product VS time varies within a volume to distinguish product repeats

- 6/18/08 FOS Meeting

## TDWR Level III Plans – Backup Slide VCP Elevation Scan Coverage Comparison

- 6/18/08 FOS Meeting

## TDWR Level III Plans – Backup Slide TDWR SPG Algorithm/Product Processing

- 6/18/08 FOS Meeting