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Analyzing Surface Wind Fields Near Lower Cook Inlet And Kodiak Waters Using SAR

Analyzing Surface Wind Fields Near Lower Cook Inlet And Kodiak Waters Using SAR Eddie Zingone Weather Forecast Office, NOAA/National Weather Service Anchorage Alaska Gary L. Hufford Alaska Region Headquarters, NOAA/National Weather Service

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Analyzing Surface Wind Fields Near Lower Cook Inlet And Kodiak Waters Using SAR

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  1. Analyzing Surface Wind Fields Near Lower Cook Inlet And Kodiak Waters Using SAR Eddie Zingone Weather Forecast Office, NOAA/National Weather Service Anchorage Alaska Gary L. Hufford Alaska Region Headquarters, NOAA/National Weather Service Anchorage Alaska

  2. WhatIs SAR? • SAR = Synthetic Aperture Radar • Onboard a Polar-Orbiting Satellite • SAR is an active sensor that transmits microwave radiation in pulses and records the radiation backscattered in the direction of the sensor. • Measures the return energy off the wavelets caused by the local wind • Algorithm converts the data into an estimated wind speed

  3. Basic Strengths & Deficiencies of SAR • Strengths: • High resolution • Can see through clouds & at night • Deficiencies: • Needs prior knowledge of wind direction • Not available in real time

  4. SAR Data Johns Hopkins University APL http://fermi.jhuapl.edu/sar/stormwatch/web_wind/

  5. References • Bond, N.A., and S.A. Macklin, 1993: Aircraft observations of offshore-directed flow near Wide Bay, Alaska. Mon. Wea. Rev., 121, 150-161. • Fett, R., 1993: The Kamishak Gap winds as depicted in DMSP OLS and SSM/I data. Int. Jour. Rem. Sens., 14, 403-423. • Macklin, S.A., N.A. Bond, and J.P. Walker, 1990: Structure of a low-level jet over lower Cook Inlet, Alaska. Mon. Wea. Rev., 118, 2568-2578. • Mass, C.F., D. Ovens, K. Westrick, and B.A. Colle, 2002: Does increasing horizontal resolution produce more skillful forecasts? Bull. Amer. Meteor. Soc., 83, 407-430 • Monaldo, F.M., 2000: The Alaska SAR demonstration and near real-time synthetic aperture Winds. The John Hopkins University Technical Digest, 21, 75-79. • Monaldo, F.M., D.R. Thompson, R.C. Beal, W.G. Pichel, and P. Clemente-Colon, 2001: Comparison of SAR-derived wind speed with model predictions and ocean buoy Measurements. IEEE Trans. Gesosci. Rem. Sens. 39, 2587-2600. • Pichel, W. and P. Clemente-Colon, 2000: NOAA CoastWatch SAR applications and Demonstration. John Hopkins University Technical Digest, 21, 49-57. • Rosmond, T.E., 1992: The design and testing of the Navy Operational Global Atmospheric Prediction System. Wea. Forecasting., 7, 262-272.

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