Data evaluation of BDS registers from airborne transponders

The purpose of this article is the evaluation of data from BDS registers of aircraft transponders with the focus to calculate wind speed and wind direction. First part of this article focusses on BDS registers and method of calculating wind values from data of secondary surveillance radars obtained from Air Navigation Services of the Czech Republic. Evaluation and comparison of the calculated data with the real values of the wind is stated in the second part of the article.