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Altimeter error budgets

Altimeter error budgets. Chelton et al., from the “altimeter book”. Spatially varying errors. (a)TP-Jason. (b) Dry troposphere. (a)+(b). using significant wave height plus Chelton et al. table. Ponte, Wunsch & Stammer (2007, J. Atmos. Oce. Tech.). What is needed. Basic errors/Jason+TP

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Altimeter error budgets

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  1. Altimeter error budgets Chelton et al., from the “altimeter book”

  2. Spatially varying errors (a)TP-Jason (b) Dry troposphere (a)+(b) using significant wave height plus Chelton et al. table Ponte, Wunsch & Stammer (2007, J. Atmos. Oce. Tech.)

  3. What is needed • Basic errors/Jason+TP • radar noise • orbit error • environmental corrections (wet and dry troposphere, ionosphere, sea state bias,…) • models (tides, IB, high frequency correction) • Basic errors/other missions, combined products, etc. • Special topics • methodologies to get at errors • characterizations of spatial, temporal behavior • errors in time-mean, mean sea level trends,… • correlation structures • ...

  4. Charge to the group • Estimates of error variance and covariance are needed for most basic use of all altimeter products • Much information on errors is probably already there, but scattered among different splinter groups (orbit errors, radar noise, SSB, IB and dry tropospheric correction, …) • Need some focus and synthesis effort to summarize what we know and some thinking on how to get at some of the errors that we can not handle just yet

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