Trajectory prediction using BADA family 4. A comparison with the preceding families

The main goal of this document is the presentation of the recent EUROCONTOL BADA family 4 document and the changes and improvements respect its predecessor at the trajectory prediction of some aerial vehicles. In order to do this, first we will describe the previous families used, included in the BADA family 3. First, a brief description of the situation, the model used is presented and the main parameterizations are described. After that, we will make a detailed study of the successor, BADA family 4, in which we will be able to observe which are the main changes respect the previous version and which new parameters can be calculated that we could not calculate before. Showing also the functions so it is possible to compare both families. Once we have read and learnt these documents, it is time to compare them. First this is done in a more descriptive way, observing the main differences in the formulas used and which is the right process and order to use them. After that, in order to see the differences in an analytical view, we will do the same simulation taking into account both ways to calculate the trajectory parameters. As BADA family 4 is a very recent document, there are no premade programs that use its formulas, due to this situation, we had to prepare a MatLab program in order to compare both of them. Another issue due to be recent is that is restricted, so we can only simulate a determined plane in a determined conditions. In order to know if our program works properly, EUROCONTROL have given us the result of how should be the parameters depending on altitude, atmosphere and engine type. At the end, we will compare both documents analytically using those programs. First, it is shown that the based on BADA 4 give the expected results taking into account different environments with different input parameters. After this, the program that simulates BADA 3 will be used and the output given by both documents is studied and analysed.