Abstract
An analysis scheme is developed to estimate drift or low frequency noise in ship measurement systems during GATE. The term “measurement system”. is used to encompass the collection of hand recorded as well as automatically recorded observations. The scheme is applied to ship systems measuring pressure, wet-bulb temperature, sea-surface temperature, dry-bulb temperature, wind speed, and wind direction. The drift analysis scheme is found to be quite successful in estimating the drift for the pressure and temperature measurement systems, but little success is found in the analysis of the wind data. In many cases the analysis scheme provides information about the error content of systems that would otherwise be unavailable and shows that drift corrections based solely on ship intercomparison results can, in some cases, lead to significant errors.
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