RADARSAT APPLICATION IN OCEAN WIND MEASUREMENTS

Vladimir Zabeline, Laurie Neil, Shahid KhurshidChris Fogarty, William Perrie, Paris W. Vachon, Sergey

Komarov

IGARSS July 28, 2011 Vancouver

NSW Project Objectives

Implement a quasi-operational SAR wind processing system on a national scale

Identify the best system architecture for the National operational SAR wind processing system within EC

Conduct assessment and cost-benefit analysis as the basis for EC decision regarding an on-going operational system

Ensure effective communication with, and training of end users

Encourage and facilitate collaboration between all users of SAR data (internal, interdepartmental, international)

Expected Outcomes

National quasi-operational prototype of the SAR Wind system;

Recommendations to EC Management on the future operationalization based on :

– Users’ feedback and the cost-benefit analysis– Optimal image ordering strategy– Architecture of operational system (locations and number

of nodes, governance etc.)– Opportunities for future improvements

The Evolution of NSW

Transition Period

Operations

Decision Point

NSW – Prototype System

National SAR Wind “Wind Information Processing System”

NSW-WIPS

Visual Product Generator

NWP ModelWind Information

www.cwinds.ca/nsw

Observations(Buoys Only)

RADARSAT-1RADARSAT-2ENVISAT-ASAR

NSW Prototype Architecture

NSW AccomplishmentQuasi-operational for 23 months (>15000 images processed FY 2010-11)

Coverage of all Canadian Coastal Water (incl. METAREAS)

NSW products available on Ninjo (via CMC)

Implementation of in-house built advanced cross-polarization based models

Nation-wide training program (185 participants)

SAR Winds users community: SharePoint & two wiki sites

Two National workshops on “SAR Wind Operationalization”

NSW revealed strong internal and external demand:– User Survey (>200 survey - 5 regions)– 97% support for a fully operational NSW– DND & DFO requested to maintain SAR Winds production

Testing results of different regression models

MODEL

VARIABLES TESTING SUBSET N=257 TRANING SUBSET N=313

RMSE (m/s) Rsquared

RMSE (m/s) Rsquared

VV+VH X X X 1.3249 0.8795 1.2499 0.8606

VV+VH+DIR X X X X 1.3126 0.8835 1.1278 0.8865

CMOD VV X X X 1.5170 0.9191 1.5083 0.8442

VH

MODEL

VARIABLES TESTING SUBSET N=57 TRANING SUBSET N=162

RMSE (m/s) Rsquared

RMSE (m/s) Rsquared

HH+HV X X X 1.7195 0.7731 1.6111 0.8326

HH+HV+DIR X X X X 1.3717 0.8524 1.3779 0.8775

CMOD HH X X X 2.1841 0.7012 2.2830 0.7848

VV

HV HH

Retrieved vs. buoys wind speed- VV+VH model

0 2 4 6 8 10 12 14 16 18 20 22 240

2

4

6

8

10

12

14

16

18

20

22

24

Buoy wind speed, m/s

SA

R w

ind

sp

eed

, m

/sN = 313Y = 0.86063X+1.0701RMSE = 1.2499 m/sBias = 1.4818e-014m/sR squared = 0.86063

NSW Spatial CoverageAtlantic Region

(AR)Ontario Region

(OR)

Prairie & Northern Region Inland Lakes (PNR-Inland

Lakes)

Quebec Region (QR)

Pacific & Yukon Region (PYR)

Hudson & James Bay Region (HJBayR)

METAREAs Obligations

NSW’s potential contribution to meeting Canada’s METAREAs obligations.

The Map illustrates one day of SAR coverage from RADARSAT-2 (July 18, 2010). This is illustrative of current SAR coverage.

Additional SAR missions, including the RADARSAT Constellation Mission (2016) will provide full Arctic coverage 2-3 times per day.

NSW SAR Data UtilizationNational SAR Wind SAR Data Utilization

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

Aug-09 Oct-09 Dec-09 Feb-10 Apr-10 Jun-10 Aug-10 Oct-10 Dec-10 Feb-11 Apr-11 Jun-11

Month

Nu

mb

er

of

Sc

en

es

ENVISAT-ASAR

Radarsat-2

Radarsat-1

Training

Ap-09 Mar-11

National SAR Wind Project (NSWP)April 2009 to March 2011

Halifax by Dr. Chris Fogarty

Feb, 20102 day Training

session

Toronto by Laurie Neil

March, 20102 day Training

session

Vancouver by Laurie NeilMay, 2010

2 day Training Session

Edmonton by Laurie NeilSeptember,

20102 day Training

Session

Winnipeg by Laurie Neil

October, 20102 day Training

Session

Quebec by Marie-France

TurcotteNovember,

20103 day Training

Session

SAR Winds: Operational Forecasting

Hi-res numerical

model

Hi-res SARimagery

Bank of knowledge to

be used in the future; Users develop/refineconceptual models

Forecasterassimilatesinfo for the

day

Existing forecast

Updated forecast

SARimagery

Future forecast

Hi-res numerical

model

SARimagery

Amendedforecast and

warning when required

Updated forecast

ForecastTeam

SoftwareTeams

ForecastCycle

Future ForecastCycles…

ongoing science training and maintenance training

via Change Management

Process24/7

operationalsupport

New science/algorithms (Lab)

NSW Web Portal – CWINDS.CA

Wind Speed Legend

Swath

SAR Scene, NWP model and

Buoy details Current & Previous

Month

NSW SAR Wind Product -Ninjo

NSW SAR Wind Product – ENVISAT-ASAR

NSW SAR Wind Product –MSSR-OSVN Maritime Satellite Surveillance Radar

Channelling Effect - St. Lawrence, QC

Low Pressure December 06, 2010 – NS

Strong Outflow Winds - Baffin Island

Pangnirtung

Extremely strong outflow winds through Pangnirtung and Kingnait Fiord on Baffin Island.

At the time of this image (November 27, 10:36 GMT) winds at Pangnirtung were gusting over 80 km/hr.

Within 2 hours after this image, gusts were near 130 km/hr.

Cold Air Streaming Out – BC

NSW Products – Gulf of Mexico

RADARSAT © CANADIAN SPACE AGENCY

RADARSAT is an official mark of the Canadian Space Agency

RADARSAT-2 data and products © MacDONALD, DETTWILER AND ASSOCIATES LTD. 2010 – All Rights Reserved

RADARSAT is an official mark of the Canadian Space Agency

Improved Model – Hurricane Earl

CMOD_IFR2 MODEL VV+VH

September 2, 23:00 UTC. The eye ~ 33N, 75W

NSW Web Portal http://cwinds.ca

SharePoint http://nswp.ca

National SAR Winds Links