1. The Network-Enabled Verification Service (NEVS)
Jennifer Mahoney
6 October 2009

2. NEVS Development Team Sean Madine – NEVS Project Lead
Nick Matheson – NEVS Tech Lead
Missy Petty – Engineer
Dan Schaffer – Engineer
Tim Pease - Engineer
Geary Layne – Scientist
Steve Lack - Scientist

3. Outline Background - verification information What is NEVS?
NEVS Architecture
Timeline

4. Requirements for Accuracy Information - Summarized
Concepts that adequately measure forecast performance in the context of aviation operations
A delivery mechanism for distributing the performance information when needed by the SAS and ATM decision tools.

5. Why Performance Information is Different
Forecast Data
Weather forecast data valid short period of time and then replaced with next forecast
Performance information requires the entire history of forecast data for computing the metrics
Performance metrics computed using
historical archive of forecast data

6. Why Performance Information is Different
Therefore, to develop and produce performance information continually,
A mechanism for managing data is required
Integrating operational criteria with performance information is critical
Distribution of the performance information when needed is vital
Performance metrics computed using
historical archive of forecast data

7. What is NEVS A delivery mechanism for forecast performance information
Utilizes relational database technology to integrate weather data with operational decision criteria to generate performance metrics on demand

8. The NEVS Concept for NextGen ATM-Integration
NEVS will provide “dash board-like” information to monitor health of NextGen weather system
Importantly, NEVS will provide real-time warning signs to ATM decision tools about the performance of the weather forecast for operational decisions

9. The NEVS Dash Board NEVS sends warnings to ATM decision tools when:
Measures of airspace capacity, as computed by the convective weather forecast, begins to deviate significantly from the forecast and exceed operational planning criteria
A wind forecast used for landing aircraft at airports is not performing as expected and dangerous cross winds are beginning to enter the operational domain of interest
IFR conditions are developing sooner than forecast and will impact the terminal capacity.

10. Sector Impact using Mincut Bottleneck Technique
21 Aug 2009;
1500 UTC, 6h lead

11. Traditional Measures using Mincut Bottleneck Technique
Bias
Bias with Confidence
21 Aug 2009;
1500 UTC, 6h lead

12. Planning Point Capacity Plot
% Blockage as derived from Mincut Bottleneck Technique
Cessation
Onset
CCFP struggles with 2-h gaps in lead times, but in this case is closer to onset than a 15-min forecast
CCFP has no 8-h forecast, tough to make decisions on traffic clean up.

13. NEVS at MOC ATM Interface NEVS 4-D Wx Cube F F1 F2 F3 O SAS V1 V2 V3
ATM Decision Criteria
Automated
Monitoring
Integrated
Common
Weather
Picture V1 V2 V3
User-specific
Verification
Info from NEVS V4 V5
NNEW
NWS IT 11

14. NEVS Architecture 14

15. NEVS Service Perspective Machine to Machine

16. NEVS Service Perspective: Web Application

17. NEVS NextGen Services
NEVS will be both a service provider and service requester
Types of services
General
Depend on common infrastructure for service location and data publishing and subscription
Weather data
Core input to NEVS
ATM data
Data to connect NEVS verification information to weather consumers

18. NEVS Timeline FY10 FY11 FY12 FY13 Beyond NextGen Relevance
Outcome: Performance Measures into ATM Decision tools
FY10
FY11
FY12
FY13
Beyond
Step 1: NEVS Demo; idea exploration
Step 3: IOC Demo: NEVS (v1b) output integrated into ATM tool
and 4-D Wx cube
exploration for ATM decisions;
Performance technique
engineering development
NNEW Apps
Data exchange and engineering
NEVS/ATM tool connection;
NEVS/ATM tool end to end
connection
and testing with ATM systems
IOC NEVS preparation
Performance Techniques
Increase functionality
and user questions
Step 2: NEVS Demo;
Integration of preliminary concepts within an ATM tool

19. Questions?