George Lewis pointed out I didnt enter realistic values for time and position accuracy so here are revised observations 21147 91 017A 8597 F 19981127120003800 17 25 0633200-521700 48 25017 97 064A 8597 F 19981128121138700 17 25 1615000-783500 48 25017 97 064A 8597 F 19981128121249600 17 25 0632500-520500 48 21147 91 017A 8597 F 19981128123014200 17 25 2206700-465600 48 25017 97 064A 8597 F 19981130113845900 17 25 1641000-775000 48 25017 97 064A 8597 F 19981130114149600 17 25 0541600-343400 48 S