National Network of Regional Coastal Monitoring Programmes
Note that these are real-time data and are not quality-controlled. Long-range graphs are plotted from a randomised subsample of half-hourly data.
Second Severn Crossing
Tide Levels and HarmonicsThese wave data have undergone full quality control. Poor data is flagged, not removed. A summary of the flagging system is included in the table below.
Full details of the flagging and quality control procedures can be found in the Quality Assurance and Quality Control of Waves Data handbook.
In subsequent use of the data, please use the following attribution:
Copyright: Teignbridge DCAcknowledgement: Southwest Regional Coastal Monitoring Programme
| Flag | Suspect Parameters | Not Suspect Parameters | Description |
|---|---|---|---|
| 0 | Hs, Tz, Tp, Direction, Spread, SST | All data pass | |
| 1 | Hs, Tz, Tp, Direction, Spread | SST | Either Hs or Tz fail, so all data fail, except SST |
| 2 | Tp, Direction, Spread | Hs, Tz, SST | Tp fail + derivatives |
| 3 | Direction, Spread | Tp, Hs, Tz, SST | Direction fail + derivatives |
| 4 | Spread | Direction, Tp, Hs, Tz, SST | Spread fail |
| 5 | Not used | ||
| 6 | Direction, Spread | Hs, Tz, Tp, SST | Re-processed due to breaking waves |
| 7 | Hs, Tz, Tp, Direction, Spread, SST | Buoy off location | |
| 8 | SST | Hs, Tz, Tp, Direction, Spread | SST fail |
| 9 | Hs, Tz, Tp, Direction, Spread, SST | Missing data | |
These tide data have undergone full quality control. Poor data is flagged, not removed. A summary of the flagging system is included in the table below.
Full details of the flagging and quality control procedures can be found in the Quality Assurance and Quality Control of Tide Data handbook.
In subsequent use of the data, please use the following attribution:
Copyright: Teignbridge DCAcknowledgement: Southwest Regional Coastal Monitoring Programme
| Flag | Description |
|---|---|
| 0 | Not used |
| 1 | Good data |
| 2 | Interpolated value |
| 3 | Doubtful value, typically not used |
| 4 | Isolated spike or wrong value |
| 5 | Correct but extreme value |
| 6 | Reference change detected, typically not used |
| 7 | Constant values, i.e. flat-lining |
| 8 | Out of range |
| 9 | Missing data |
