begin_tracking  end_tracking     lptid  lptgroup  duration  mean_zonal_spd   lpt_begin     lpt_end      eprop_begin_idx  eprop_end_idx  eprop_spd  eprop_dur eprop_begin   eprop_end     eprop_lon_begin  eprop_lon_end
    1998010400    2000063021    1.1000         1    210.00            8.55  1998010712  1998011906                   25             94       8.58     207.00  1998011015  1998011906                46.5           96.2
    1998010400    2000063021    2.1000         2    594.00            6.89  1998011703  1998021321                   27            222       6.94     585.00  1998012012  1998021321               169.4          290.8
    1998010400    2000063021    2.3000         2    807.00            3.10  1998010806  1998021321                   30            107       2.31     231.00  1998011200  1998012115               186.8          219.4
    1998010400    2000063021    5.2000         5    348.00            7.57  1998020715  1998022503                   55            140      10.38     255.00  1998021412  1998022503               197.8          272.1
    1998010400    2000063021    7.2000         7    468.00            4.25  1998021806  1998031218                   25            180       4.26     465.00  1998022109  1998031218               139.8          197.4
    1998010400    2000063021   11.1000        11    348.00            3.01  1998032903  1998041515                   30            136       2.98     318.00  1998040121  1998041503                60.6           95.9
    1998010400    2000063021   14.1000        14    297.00            0.48  1998050618  1998052203                   25            123       0.46     294.00  1998050921  1998052203                83.4           94.7
    1998010400    2000063021   15.1000        15    213.00           13.37  1998051218  1998052415                   25             95      13.38     210.00  1998051521  1998052415               116.1          197.6
    1998010400    2000063021   19.1000        19    366.00            1.13  1998060818  1998062700                   51            125       1.23     222.00  1998061503  1998062409               251.9          281.7
    1998010400    2000063021   22.1000        22    876.00            0.27  1998071106  1998081918                   26            174       2.56     444.00  1998071412  1998080200                77.2          128.7
    1998010400    2000063021   30.1000        30    375.00            5.10  1998091621  1998100512                   40            118       5.11     234.00  1998092121  1998100115                88.8          131.3
    1998010400    2000063021   37.1000        37    219.00            1.75  1998112403  1998120606                   27             97       1.59     210.00  1998112712  1998120606               291.5          306.4
    1998010400    2000063021   41.2000        41    360.00            3.96  1998122300  1999011000                   25            144       3.96     357.00  1998122603  1999011000                97.5          152.3
    1998010400    2000063021   43.2000        43    897.00            3.79  1999011509  1999022418                   54            267       4.60     639.00  1999012203  1999021718                84.5          184.6
    1998010400    2000063021   47.2000        47    651.00            1.79  1999031000  1999040903                   83            206       2.82     369.00  1999032009  1999040418                93.7          140.6
    1998010400    2000063021   57.1000        57    231.00            4.20  1999070100  1999071315                   31             92       5.25     183.00  1999070421  1999071212               127.2          153.5
    1998010400    2000063021   65.1000        65    471.00           -0.28  1999091806  1999101021                   34             91       4.62     171.00  1999092212  1999092915                70.0           95.1
    1998010400    2000063021   68.2000        68    573.00           -0.56  1999101218  1999110815                  122            190       0.66     204.00  1999102800  1999110512                97.4          110.9
    1998010400    2000063021   73.3000        73    573.00            4.52  1999112321  1999122018                   25            215       4.53     570.00  1999112700  1999122018                76.0          149.1
    1998010400    2000063021   76.1000        76    342.00            0.76  1999121909  2000010515                   29            138       0.59     327.00  1999122300  2000010515               299.8          322.5
    1998010400    2000063021   77.1000        77    360.00            5.58  1999122618  2000011318                   53            123       8.17     210.00  2000010209  2000011103                74.7          127.0
    1998010400    2000063021   81.1000        81    426.00           -2.02  2000021309  2000030503                   29            108       2.51     237.00  2000021700  2000022621                72.7           97.3
    1998010400    2000063021   85.1000        85    273.00            3.43  2000040503  2000041912                   50            115       8.24     195.00  2000041109  2000041912               296.5          342.7
    1998010400    2000063021   93.1000        93    219.00            3.97  2000061818  2000063021                   25             93       4.06     204.00  2000062121  2000063009               119.7          142.6