Dataset {
    Float64 esecs[esecs = 15808];
    Float32 NominalDepth[NominalDepth = 1];
    Float64 Longitude[Longitude = 1];
    Float64 Latitude[Latitude = 1];
    Grid {
      Array:
        Int16 offset[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } offset;
    Grid {
      Array:
        Int32 timestamp[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } timestamp;
    Grid {
      Array:
        Float32 latitude[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } latitude;
    Grid {
      Array:
        Float32 longitude[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } longitude;
    Grid {
      Array:
        Float32 speed[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } speed;
    Grid {
      Array:
        Float32 course[esecs = 15808][NominalDepth = 1][Latitude = 1][Longitude = 1];
      Maps:
        Float64 esecs[esecs = 15808];
        Float32 NominalDepth[NominalDepth = 1];
        Float64 Latitude[Latitude = 1];
        Float64 Longitude[Longitude = 1];
    } course;
} m1_gpsclock_20081008.nc;