1. Radar Based Terminal Weather Systems Update Mark Weber MIT/Lincoln Laboratory 13 October 2004

2. TDWR Measurement Capabilities
Dry Microburst
Wet Microburst
Gust Front
Buoyancy Waves
>15.0
First
Echo
12.5
10.0
7.5
5.0
2.5
-2.5
Memphis
International
Airport
-5.0
-7.5
-10.0
Thunderstorm initiation
along outflow boundary
-12.5
Gust Front
-15.0

3. Terminal Doppler Weather Radar
System availability continues to increase
Processor modernization, antenna drive improvements, redundant communication lines
Service improvement opportunities
Exploit increased computer capacity to improve data processing algorithms
Demonstration at SLC in
Implement 0-20 minute graphical thunderstorm nowcast
Facilitate external access to TDWR base data
Develop external user web site for product access

4. Integrated Terminal Weather System (ITWS)
Goals
Improve safety
- Improved wind shear protection
Proactive avoidance of severe weather
Reduce Delay
- Storm motion and forecasts
- Adverse winds
Reduce controller workload
- Shared situational awareness
 Provide weather information to air
traffic automation systems
User Identified Benefits
Higher departure rates during thunderstorms
Anticipating arrival and departure fix
closure/reopening
Anticipating runway impacts and shifts
Higher arrival rates during adverse winds
Optimizing airline operations

5. ITWS Production Web

6. Integrated Terminal Weather System
11 systems operational (7 production + 4 Lincoln prototypes)
4 more production sites scheduled FY2005
Funding for total of 22 sites programmed
First planned product improvements underway
1 hour Convective Weather Forecast
Dry microburst detection
Service Improvement Opportunities
Establish process and funding for regular algorithm enhancements
Advanced capabilities developed by AWRP
Deploy to all TDWR equipped airports as originally planned

7. ASR-9 Weather Systems Processor
Sites

8. ASR-9 Weather Systems Processor
31 of 34 planned production sites operational
WSP availability at production sites has been high
Service improvement opportunities
Activate TWIP interface built into WSP
Develop external user web site for product access
Convene “users conference” to assess system performance on a national basis
Guidance for future product enhancements

9. Medium Intensity Airport Weather System (MIAWS)
Sites
Tower/TRACON Supervisor Display
SD Pull-Down Menus
Storm Motion
Vector
Storm Position
10 & 20 Minute
Extrapolation
Runway
Arenas

10. Medium Intensity Airport Weather System
Program terminated June 2004
FAA Executives felt that combination of LLWAS-RS and ASR-11 weather channel provide adequate service
Prototypes at Springfield, MO and Jackson, MS will continue to operate until ASR-11 is deployed
Low cost “network-enabled” MIAWS service to be demonstrated in FY2005
High resolution regional thunderstorm nowcasts generated by Corridor Integrated Weather System (CIWS)
Small terminal displays access CIWS products using System Wide Information Management (SWIM) “publish/subscribe” technology

11. Summary Key accomplishments during the last year Ongoing needs
TDWR availability and data/product quality improvements
Additional ITWS systems in operation and planned product improvements underway
WSP essentially fully deployed
Ongoing needs
Increased non-ATC user access to products from these systems
Continue to enhance data and product quality through structured product improvement process