品質管理フラグ (CTD/XCTD/XBT/TSG)

  1. Depth Flags
  2. 0 - accepted value
    1 - error in recorded depth ( same or less than previous depth )
    2 - density inversion

  3. Observed Level Flags
  4. N - missing value
    0 - accepted value
    1 - range outlier ( outside of broad range check )
    2 - failed inversion check
    3 - failed gradient check
    4 - zero anomaly
    5 - failed combined gradient and inversion checks
    6 - failed range and inversion checks
    7 - failed range and gradient checks
    8 - failed range and zero anomaly checks
    9 - failed range and combined gradient and inversion checks
    A - failed visual check

    * XBTデータはrange及びgradientについて、Thermosalinographデータはrangeについてのみ閾値を設けたチェックが行われました。

  5. Date and time flag (Thermosalinograph only)
  6. 0 - accepted data and time
    1 - failed duplicate/missing/incorrect date and time

  7. Position flag (Thermosalinograph only)
  8. 0 - accepted position
    1 - failed estimated ship speed check including missing/incorrect position

    QCed dataはRaw dataに対し、NODC (National Oceanographic Data Center) のデータ評価手法に基づいて品質管理し、ビジュアルQC後のデータを公開しています。データ評価手法についてはNODCのサイトをご覧下さい。