After you have defined your close approach analysis parameters and selected and dimensioned your primary and secondary objects, you can perform your close approach analysis by clicking Compute on the Main page for the Advanced CAT object, or selecting Compute from the AdvCAT object tools menu.
During the computation process, Advanced CAT will display a Status window to apprise you of the activity being carried out and the time remaining before computation is completed. If you select the Display Acknowledgement when done option prior to using the Compute button, a message window appears when the computation process is completed.