INFORMATION FOR BODC SERIES REF. NO. 34137
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Sea Floor Pressure Gauge Inventory Number : 6933
Start Time : 31 Aug 1980 1037 GMT Latitude : 51deg 21.3min N
End Time : 25 Oct 1980 1622 GMT Longitude : 008deg 31.0min W
Nominal Cycle Interval : 900.0 secs Sensor Depth : 92.00m
Sea Floor Depth : 92.00m
Positional Uncertainty : 0.1 to 0.5 n.miles
Depth Datum : Instantaneous
Project : IOS Celtic Sea Experiment 1980
Data Category : Offshore sea floor pressure series
Instrument Type : Tide gauge (unspecified)
Instrument Mounting : Sea floor - fixed
Originator Laboratory : Proudman Oceanographic Laboratory, Bidston, UK
Originator's Identifier : 808/980/244
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Additional information stored with the data:
Station E, Celtic Sea.
Clock gained 21 seconds over 65 days 8.25 hours; the cycle interval and
time values have been corrected.
Instrument characteristics and calibration factors
Teleost Pressure Recorder, sensor S/G, serial number 284
Original sampling interval 15 minutes
Integration period 900s
Temperature coefficient -1.254Hz/degC
Pressure sensitivity at 8.9106degC 0.0570Hz/mb
To convert pressure to elevation the following
values should be used:
Density (from CTD casts) 1026.63kg/m3
Gravitational acceleration constant 9.812m/s2
Three current meters were also deployed on this mooring. Discontinuity of
approximately 30 millibars between 1645h and 1700h 18 Sept 1980; tide gauge
moved 30cm down and evidence from the current meters on the rig showed a
decrease in pressure suggesting that the sub-surface buoy moved up lifting
the anchor and dragging the tide gauge frame.
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The following additional documents apply to this series:
27731; I.O.S. Calibration and Data Processing of Off-Shore Tide Gauge Data
27840; Teleost Pressure Recorder
Project Document : 28542
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