Datum Transformation from WGS84 to ED50 with Cartesian Coordinates

A reader recently; He sent an e-mail saying that he wanted to perform a coordinate transformation with cartesian coordinates between his WGS84 Datum and his ED50 Datum, but had no idea what the units of the transformation parameters would be. Since I do not have very detailed information on the subject, after doing a research and obtaining detailed information, I prepared a small application of the conversion process in the Excel program by using the coordinate values ​​obtained by converting a point to the ED50 Datum of this point with the Cartesian coordinates given in the WGS84 Datum of a point sent by my reader. I used the transformation parameters defined by HGK as the transformation parameters, and the values ​​I obtained and the desired values ​​matched exactly.

In the attached file, there is an explanatory flow chart of how the process is done and the solution of the process in Excel. I hope it will be useful in advance.

You can download the document here.