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The quality of the processed data in each SPD record is given in the SPD quality flag field PxxSFLAG where xx identifies the detectors as follows C1, C2, P1, P2, P3 SS, and SL. Table 7.2 gives the coding of each bit in the (8 bit) flag.
| Bit | Description |
|---|---|
| 0 | nominal |
| 1 | calibration measurement saturated |
| 2 | part of plateau data affected by drift |
| 3 | all ramps on plateau rejected |
| 4 | plateau data affected by residual drift |
| 5 | zero standard deviation |
| 6 | empty |
| 7 | zero signal for plateau |