Dataset {
    Int32 /DeadReckonUsingMultipleVelocitySources/velocity_source[6561];
    Float64 /DeadReckonUsingMultipleVelocitySources/velocity_source_time[6561];
    Float32 /trajectoryNameLen[15];
    String /trajectory_id[15];
    Float32 /depth[7];
    Float64 /depth_time[7];
} cell-Normal.nc4;