Mapping Mediterranean Altimeter Data with aMultiresolution Optimal Interpolation
نویسندگان
چکیده
2 Abstract. A multiresolution optimal interpolation scheme is described and used to map the sea level anomaly of the Mediterranean Sea based on TOPEX/POSEIDON and ERS-1 data. The principal advantages of the multiresolution scheme are its high computational eeciency, the requirement for explicit statistical models for the oceanographic signal and the measurement errors, and the production of error variances for all estimates at multiple scales. A set of MATLAB-callable routines which implement the multiresolution scheme have been made available on FTP anonymous. The oceanographic signal is here modeled as a stationary 1=k process, where k is the horizontal wavenumber. Measurement noise is modeled as the sum of two separate random processes: a Gaussian white noise process, and a correlated process of low wavenumber representing the uncertainties in the orbital position of the satellite and in the atmospheric load corrections. The eeciency of the multiresolution scheme allowed the testing of more than 16,000 sets of hypothesized statistical prior model parameters in order to determine the most likely parameters. Mapping results with and without low-wavenumber error corrections are presented and compared. 3
منابع مشابه
Mapping Mediterranean Altimeter Data with a Multiresolution Optimal Interpolation Algorithm
A multiresolution optimal interpolation scheme is described and used to map the sea level anomaly of the Mediterranean Sea based on TOPEX/Poseidon and ERS-1 data. The principal advantages of the multiresolution scheme are its high computational efficiency, the requirement for explicit statistical models for the oceanographic signal and the measurement errors, and the production of error varianc...
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