Dataset {
    Int32 /DeadReckonUsingMultipleVelocitySources/velocity_source[2705];
    Float64 /DeadReckonUsingMultipleVelocitySources/velocity_source_time[2705];
    Float32 /trajectoryNameLen[15];
    String /trajectory_id[15];
    Float32 /depth[4];
    Float64 /depth_time[4];
} hotspot-Normal.nc4;