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Roughness Correction Working Group Report

Roughness Correction Working Group Report. July 21, 2010 Seattle 6 th Aquarius/SAC-D Science Team meeting. Membership. S. Brown R. Lang D. LeVine L. Jones D. Vandenmark , B. Chapron F. Wentz S. Yueh Peter Naoto Carl Liang Alex Fred Josehph Emmanuel Add others.

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Roughness Correction Working Group Report

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  1. Roughness Correction Working Group Report July 21, 2010 Seattle 6th Aquarius/SAC-D Science Team meeting

  2. Membership • S. Brown • R. Lang • D. LeVine • L. Jones • D. Vandenmark, B. Chapron • F. Wentz • S. Yueh • Peter • Naoto • Carl • Liang • Alex • Fred • Josehph • Emmanuel • Add others

  3. Roughness Working Group Charter • Provide and validate algorithms to compute L-band Tb offset due to surface roughness

  4. StrawmanPlan • Pre-Launch: Now until April 2011 • SMOS data analysis for Aquarius pre-launch model • Generate software tools for post-launch data analysis • Calibration site selection • In Orbit Checkout (IOC): L+45 days • Assess the reasonableness of instrument performance • Telemetry Analysis: Time series of system noise, temperature, voltage and current • Quick analysis of pointing • Quick analysis of TB and sigma0 quality • Quick model assessment • Daily/Weekly Status? • Data available from L+25 to L+45, about 2 weeks of data

  5. Strawman Plan • Cal/val phase (L+6 months) • Calibration bias removal – in coordination with cal WG • Pointing angle analysis using TB and sigma0 changes along land/sea crossings • TB stability and drift analysis correction in coordination with Rad Cal WG • Sigma0 calibration stability • Aq TB-SMOS-TB cross-over comparison (doug) • Develop model function and correction • TB model function (wind, SST, and wave matchup) • Sigma0 model function (Aquarius, NCEP wind, SST, and wave matchup) • TB-sigma0 model function (Aquarius, NCEP, SST, and wave matchup) • Alternate wind products for matchup: ecmwf, ssmi wind, no-gap, ncep reanalysis , oceansat-2, windsat, (Fred et al. carl, Linny for ssmi matchup, and simon) • Assess roughness correction algorithms • Baseline: SSS= aTB+bSST+cW • Various combinations of NCEP wind, sigma0, sigma0-wind, MWR-wind, wave height, and mss • MWR Wind becomes available from CONAE: 5 mos after launch • MWR rain flag available in L+30 days (Linny) • Iterations of steps above • BiWeekly status/tagup • Fact-to-face workshops (L+3 and L+5) • Reach consensus on correction algorithm and report to science team

  6. Working Group Plan • Biweekly Telecon • Aquarius Forum information exchange and Wiki for FAQ and information depository • Face-to-face meetings (L-1, L+3 and L+5)

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