INFORMATION FOR BODC SERIES REF. NO. 40874
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Sea Floor Pressure Gauge Inventory Number : 7012
Start Time : 03 Oct 1969 1315 GMT Latitude : 47deg 40.1min N
End Time : 08 Nov 1969 0930 GMT Longitude : 007deg 14.8min W
Nominal Cycle Interval : 900.0 secs Sensor Depth : 165.00m
Sea Floor Depth : 165.00m
Positional Uncertainty : 0.1 to 0.5 n.miles
Depth Datum : Instantaneous
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 : C1SP2/PDFH4
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Additional information stored with the data:
No timing correction applied; nominal sampling interval used.
Instrument Characteristics
Station C1
OSTG Mark I Channel 1 (BODC Series Ref. 40862)
2 (BODC Series Ref. 40874)
Nominal sampling interval 900 seconds
Integration period 890 seconds
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I.O.S. Data Processing of Off-Shore Pressure Recorder Data 3
Data processing comprises 2 stages:-
1. Instrumental drift and depth are removed, thus the drift free series is
produced with an artificial mean of zero.
2. Generally the pressure values have been obtained by integration and
averaging over the sampling interval, followed by logging; hence the
time value assigned to a data cycle has been chosen as the mid-point
between the start and end time of each interval. Some pressure records
have been sample rate reduced from the basic time step of the recorder
to produce either hourly or 15 minute values, incorporating any timing
corrections due to clock error.
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The following additional documents apply to this series:
27728; Off-Shore Tide Gauge Type I
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