Location

Virtual

Start Date

5-10-2021 9:55 AM

End Date

5-10-2021 10:05 AM

Description

The main limitation to the resolution enhancement of spaceborne scatterometers is the amplification of both measurement noise and model error. A few components to model error include: model discretization errors, interpolation errors, and the aliasing of frequency content introduced by each measurement spatial response function (MSRF). Using bandlimited reconstruction theory, we estimate the maximum resolution enhancement of a given sampling geometry through its inherent maximum square bandlimit. Simulations suggest that under bandlimited assumptions, the number of independent and uniformly distributed samples are proportional to the area of the sampling geometry’s supported bandlimit. Furthermore, if we assume that the measurement noise is white Gaussian noise, then the supported bandlimit does not change. Using the simulations described in this paper, a rough estimate of the theoretical maximum resolution of a single swath of RapidScat ‘egg’ measurement is 5.55kmx5.55km.

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May 10th, 9:55 AM May 10th, 10:05 AM

Resolution Enhancement Limitations for Spaceborne Scatterometers

Virtual

The main limitation to the resolution enhancement of spaceborne scatterometers is the amplification of both measurement noise and model error. A few components to model error include: model discretization errors, interpolation errors, and the aliasing of frequency content introduced by each measurement spatial response function (MSRF). Using bandlimited reconstruction theory, we estimate the maximum resolution enhancement of a given sampling geometry through its inherent maximum square bandlimit. Simulations suggest that under bandlimited assumptions, the number of independent and uniformly distributed samples are proportional to the area of the sampling geometry’s supported bandlimit. Furthermore, if we assume that the measurement noise is white Gaussian noise, then the supported bandlimit does not change. Using the simulations described in this paper, a rough estimate of the theoretical maximum resolution of a single swath of RapidScat ‘egg’ measurement is 5.55kmx5.55km.