The workhorse product of many water level networks: one value every tenth of an hour, each an average of a few minutes of rapid samples so that waves are smoothed out. Users talk about pulling the six-minute data for survey tide corrections, storm analysis and datum work, as opposed to hourly heights or the high and low summaries. Faster one-minute data are kept for tsunami and storm monitoring.
Pull the six-minute data for the whole week and run it through the zoning before tonight's processing.
Also heard as
- 6-minute data
- six-minute water levels
Related terms
Tide gauge
An instrument that records water level continuously at a fixed point, the basic tool of tidal measurement.
Flatline
A stretch of water level data stuck at one value, a sign of a frozen, failed or dry sensor.
Residual
The observed water level minus the predicted tide, showing the effect of weather, rivers and other non-tidal causes.
Microwave radar sensor
A non-contact water level sensor mounted above the surface that measures the distance down to the water by radar.