# Presentation: 453361

## Real-Time Dissemination of Airborne Doppler Radar Data from the NOAA P-3 Aircraft:A Progress Report

**PI:  John Gamache (HRD)**
**Collaborators:  Peter Dodge, Joe Griffin, Nancy Griffin, Paul Leighton (HRD), and Alison Krautkramer (TPC/JHT)**
**Points of Contact:  James Franklin and Colin McAdie at NHC**
**EMC collaborator:  Qingfu Liu**
**Thanks to NOAA/AOC **
***http://www.aoml.noaa.gov/hrd/project2003/doppler.html***

## Project Goals

**Develop a airborne-Doppler hurricane wind-field analysis in “real time” and make portions of it available to hurricane specialists at the Tropical Prediction Center**
**Send reliable observations to the Environmental Modeling Center at NCEP for data-assimilation testing in numerical hurricane simulations**

## Main Goals of this Presentation

**List and describe briefly the tasks required for this project**
**Present the kinds of wind fields we have developed in “real time” on the P3**
**Compare analysis briefly with GPS sondes for one case**
**Future work**

## Vertically scanning X-band Doppler radar 

- Vertically scanning X-band Doppler radar
- aboard the NOAA P-3 Aircraft
- NOAA Antenna

**Jorgensen et al., JAM, 1983**

## HRD Software Prior to JHT

**Three-dimensional variational analysis of winds from airborne Doppler radar data**
**Higher resolution radius height cross-section of wind along the inbound and outbound legs **

## Project Requirements

**Automated Quality Control of Raw Doppler Data (completed)**
**Software to generate batch job files (completed)**
**Software to generate output files that can be transmitted off the aircraft by SATCOM to EMC (completed) **
**Software to generate tagged files to send analyses to TPC via SATCOM (in progress)**
**Network communication path to TPC and EMC (in progress)**

## Doppler Radial Velocity

**Doppler Radial Velocity**

**Hurricane Humberto**
**232855 UTC 23 Sep 2001**

**Raw (except for standard Bargen-Brown unfolding)**

**HRD QC**

## “Real-Time” 2004 airborne-Doppler Accomplishments in Hurricane Ivan

**Three-dimensional wind fields and vertical profiles produced in real time in Hurricane Ivan (2004)--1 per flight during N43RF flights on Sep 12, 13, and 15**
**Files of trimmed quality-controlled radial velocities produced that could be sent to EMC by SATCOM**

## Wind speed in m/s at 1-km altitude

- Hurricane Ivan 12 September 1115-1145 UTC
- (digital camera picture of N43RF airborne workstation)

**Notes:**
Due to a bug only this low-wavenumber fourier analysis wind field worked properly in real time

## Radial wind (m/s) along outbound (SE) flight leg

**Notes:**
Height in km on left side.  Radius from storm center on bottom.  Note the stronger inflow at lower heights.  Lowest good level at 150-300 meters.

## Wind speed in m/s along outbound (SE) flight leg

**Notes:**
Note double wind maximum at 15 and 50 km from storm center

## After flight cartesian airborne-Doppler analysis

**After flight cartesian airborne-Doppler analysis**
**of winds from same flight leg at 1-km altitude**
**in Hurricane Ivan 1115-1145 UTC on 12 September 2004**
**Available real time in 2005**

**Notes:**
Analysis done in 4x4 km cartesian grid, instead of a low-wavenumber azimuthal analysis.

## Comparison of Doppler Vertical Cross Section 

**Comparison of Doppler Vertical Cross Section **
**with GPS Eyewall Sonde**

**Wind speed m/s**

**GPS sonde**

**Doppler analysis**

## Horizontal plots of total wind speed at 2 km altitude

**Horizontal plots of total wind speed at 2 km altitude**
**Hurricane Isabel 1710 UTC 12 Sep 2004**

## Radius-height cross-sections of radial wind

**Radius-height cross-sections of radial wind**
**Hurricane Isabel 1710 UTC Sep 12 2004**

## Grand

**NWS GEMPAK display of automatic Doppler analysis at 1600 ft altitude.  Wind barbs at left and total earth-relative wind speed in knots on right**
**Display developed at TPC by Alison Krautkramer**
**Hurricane Ivan on 12 Sep 2004 at 1453 UTC**

**Grand**
**Cayman**

**Possible further application:  **
**Modification of flight plan to find max wind.**

## Summary

**We can produce real-time airborne Doppler wind analyses reliably**
**They are available in either a three-dimensional form, or as two-dimensional radial profiles of winds.  Radial profiles have higher radial and vertical resolution than the three-dimensional fields since solution of mass continuity is not required**

## Future Work

**Compute comparison statistics with dropsondes**
**Modify package to work on the G4-upgrade Doppler radar and linux system**
**Apply automatic QC and analysis to large archive of airborne Doppler data (this spring--2004)**
**Modify quality control software to allow manual QC after automatic QC (for research)**

## Thank you

## GEMPAK wind barbs at 3200 ft altitude

**GEMPAK wind barbs at 3200 ft altitude**
**Developed at TPC by Alison Krautkramer**
**Hurricane Ivan on 12 Sep 2004 at 1453 UTC**