This paper described a two-dimensional, horizontal trajectory model to be used withobserved data from aerological soundings. The model id a modified version of the onepublished by T.Henmi and E.R.Reiter. A brief description of the fundamentals of the model is given. However, emphasis is placed on the technical description of the adaptations,modifications and generalizations attributed to the original model, to make a more realistic version that fits our intentions. Two examples of the use of the finalversions show domains of applicabily of the model.