Accuracy of Winds-aloft Data and Estimation of Error in Numerical Analysis of Atmospheric Motions

Abstract

The error of wind speed and wind direction which are determined from the rawinsonde observations are estimated in the section 2. The probable error of wind speed is about 2m/sec at 500mb and 5m/sec at 300mb level.
When the average magnitude and mean value of each term of the equation of motion are calculated by using the aerological observations, what is the accuracy of the results? This problem is discussed in the section 3. Especially, accuracy of the estimated frictional force in the free atmosphere is considered. The mean frictional force for sufficiently many cases may be statistically significant.
In the section 4, the error of the vertical velocity which is derived from the windsaloft data is estimated. And a correction formula to reduce such an error is presented.