Comparison of finite differencing, time smoothing and spline fitting algorithms for estimating airspeed metadata from coarse-resolution aircraft position and wind reports

Robert James Purser & Yanqui Zhu
As operational data assimilation procedures become more sophisticated and the need to address and allow for biases and non-Gaussianity in the given data becomes more pressing, we find we need to augment our knowledge about the details concerning the data to include not just the assimilated data values themselves, but also the “metadata” that describe the differing conditions under which the assimilated measurements are made. In the case of aircraft measurements of temperature such relevant...
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