IOOS, NOAA and HF Radar QA/QC and Standards Jack Harlan National Ocean Service Center for Operational Oceanographic Products and Services QARTOD February 2005

Current Activities within NOS National Ocean Service - Center for Operational Oceanographic Products and Services (CO-OPS) –Developing QA/QC Methods –Developing Algorithmic Standards –Velocity Vector Products for Navigation –Tidal Velocity Products –Particle Trajectory Products –National HFR Data Server

FY05 IOOS QA/QC and Standards Level 1 Errors: Influence radial velocity –Spectral frequency estimation algorithms e.g. MUSIC –SNR Level 2 Errors: Influence total velocity –E.g. Geometric Dilution of Precision (GDOP)  Algorithmic Standards

Level 1 Error Analysis Spectral Frequency Estimation DOA Codar SeaSonde uses MUSIC NOAA Project –Effect of SNR Averaged Spectra Individual Frequency Bins –Empirical and Simulation-based

Level 2 Error Analysis Total Vector Formation –two-radial-only estimates (GDOP) –unweighted least-squares (LS) estimates –level-1 error-weighted LS estimates –single-site solutions –distance-weighted LS estimates –averaging radius-dependent LS estimates

Future Work Product Development –Trajectory-based –Assimilation into circulation models –Level 3 error analysis