Best track information for ATL 1998 199809 IVAN
      Date&time      longitude       latitude  Min SLP (hPa)   Vmax (knots)
     1998091900         333.40          13.40         1010.0           25.0
     1998091906         332.50          13.10         1010.0           25.0
     1998091912         331.80          12.90         1010.0           25.0
     1998091918         331.00          13.10         1010.0           25.0
     1998092000         330.40          13.40         1009.0           30.0
     1998092006         329.40          14.30         1009.0           30.0
     1998092012         328.50          15.20         1008.0           30.0
     1998092018         327.40          16.00         1006.0           35.0
     1998092100         326.30          16.80         1005.0           35.0
     1998092106         325.10          17.40         1003.0           35.0
     1998092112         324.40          18.20         1003.0           35.0
     1998092118         324.00          19.00         1002.0           40.0
     1998092200         323.90          20.00         1001.0           40.0
     1998092206         323.90          21.30         1000.0           45.0
     1998092212         323.60          22.90          997.0           45.0
     1998092218         322.90          24.20          994.0           55.0
     1998092300         322.30          25.60          996.0           50.0
     1998092306         321.60          26.90          997.0           45.0
     1998092312         320.80          28.30          990.0           55.0
     1998092318         319.80          29.60          987.0           65.0
     1998092400         319.10          30.50          986.0           65.0
     1998092406         318.40          31.30          985.0           70.0
     1998092412         318.00          32.30          985.0           70.0
     1998092418         317.70          33.40          985.0           70.0
     1998092500         317.70          34.40          984.0           70.0
     1998092506         318.10          35.30          984.0           70.0
     1998092512         318.70          36.30          984.0           70.0
     1998092518         319.80          37.20          983.0           75.0
     1998092600         321.30          38.10          980.0           75.0
     1998092606         323.70          39.20          975.0           80.0
     1998092612         326.90          40.10          977.0           75.0
     1998092618         330.30          40.70          982.0           75.0
     1998092700         334.30          40.70          994.0           60.0
     1998092706         337.30          40.90          997.0           50.0
     1998092712         340.80          41.30         1000.0           45.0
     1998092718         344.50          41.50         1002.0           40.0