The track files use a similar format to standard ATCF files, which are commonly used in the hurricane community. The track files here are very similar to the ones decribed under fort.66 in GFDL Vortex Tracker Users Guide Version 3.9a (https://dtcenter.org/sites/default/files/community-code/gfdl/standalone_tracker_UG_v3.9a.pdf).

Column 1:   From a standard ATCF file for tropical cyclones, this is where the
            basin ID would be (AL, EP, WP, etc). Here it is identified as either "TG"
            for a "tcgen" run, where all available parameters up through 700 mb is
            used to search for a center, or "ML" for a "mid-latititude" genesis run,
            where only MSLP is used to search.
Column 2:   The sequential disturbance number for this run of the tracker. This number 
            is unique for each cyclone.
Column 3:   initial time of run
Column 4:   no meaning -- leave this as "03"
Column 5:   model ID
Column 6:   Lead time for this record
Column 7:   Latitude * 10
Column 8:   Longitude * 10
Column 9:   Max near-surface (usually 10 m) wind speed, in knots.
Column 10:  Minimum MSLP in mb
Column 11:  no meaning--leave as XX
Column 12,13:   "34, NEQ" means that positions R1 - R4 contain the radii (nm) of 34-
                knot winds in each quadrant, with the "NEQ" indicating that the first
                one listed (R1) contains the value for the northeastern quadrant and
                then going clockwise from there. If winds exceeding 50 and 64 knots
                exist at this lead time in the model, then there will be additional
                records with "50, NEQ" and "64, NEQ" where the information contained
                in the records is identical to that contained in the "34, NEQ" record
                with the exception of the radii data.
Column 18:  Pressure of last closed isobar
Column 19:  Radius (n mi) of last closed isobar
Column 20:  Radius (n mi) of max wind
Column 21-36: Meaningless--do not use
Column 37:  Method used to determine the wind radii (columns 14,15,16,17)