Superobbing Satellite Winds for NAVDAS
NAVAL RESEARCH LAB MONTEREY CA MARINE METEOROLOGY DIV
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This report presents the results from a series of tests on the superobbing strategy for satellite-derived winds in NAVDAS NRL Atmospheric Varoatopma Data Assimulation System. Introduction Neighboring high-density satellite winds tend to be highly correlated horizontally. Appropriately superobbing satellite winds can preserve most of the variability present in these observations while reducing the degree of horizontal correlation and reducing the number of single-level observations to process. This paper discusses the manner in which satellite winds are averaged into superobs in NAVDAS NRL Atmospheric Variational Data Assimilation System. Results from a series of tests of different aspects of the NAVDAS satellite wind superobbing strategy are also presented, using data from the six-hour time window centered on 1200 UTC 29 April 2002. The data and individual tests are described in sections 2 and 3 of this paper, respectively, the results are compared in section 4, and changes to NAVDAS and future work are proposed in the final section.
- Unmanned Spacecraft