1. Three-dimensional airborne Doppler analyses at HRD
John Gamache, Wen-Chau Lee, Peter Dodge,
Frank Marks, Nancy Griffin, Joe Griffin
Three-dimensional variational analysis
Real-time quality control and de-aliasing

2. Variational Analysis--Minimize the following simultaneously:
The difference between the projection of wind analysis on the Doppler radials and the original Doppler radial velocities.
The three-dimensional mass divergence (analestic approximation).
Second derivative in all three directions, as well as cross derivatives. This is a smoother and should be given a very light weight.
Difference between prescribed vertical wind at vertical boundaries (usually zero), and wind-analysis vertical wind.

5. Joint Hurricane Testbed “Real-Time Doppler” Project Goals
Develop a hurricane wind-field analysis in “real time” and make products derived from it available to hurricane specialists at the Tropical Prediction Center via SATCOM
Send reliable observations via SATCOM to the Environmental Modeling Center at NCEP for assimilation testing in numerical simulations. Main goal is to ingest the observations in the HWRF model

6. “Real-Time” 2004 Accomplishments
Sea-surface reflection removal software developed
Speckle removal developed
Minor bugs in HRD implementation of Bargen-Brown de-aliasing removed
Two-dimensional de-aliasing scheme development begun
Three-dimensional wind fields and vertical profiles produced in real time in Hurricane Ivan (2004)
File of “cleaned up” de-aliased radials produced

7. Doppler Radial Velocity
Hurricane Humberto
UTC
23 Sep 2001

8. Comparison of Analyses Created from
Research-Quality and Automatically Edited Data
At 1 km level in Hurricane Humberto
2330 UTC on 23 September 2001
Research Quality
Automatic

9. Wind speed in m/s at 1-km altitude

10. Radial wind in m/s along outbound flight leg

11. Wind speed in m/s along outbound flight leg