INFORMATION FOR BODC SERIES REF. NO. 41392 =============================================================================== Sea Floor Pressure Gauge Inventory Number : 7037 Start Time : 18 Sep 1976 0107 GMT Latitude : 62deg 50.2min N End Time : 08 Oct 1976 0736 GMT Longitude : 024deg 43.1min W Nominal Cycle Interval : 900.0 secs Sensor Depth : 493.00m Sea Floor Depth : 493.00m 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 : R1SP1/PDFH4 =============================================================================== Additional information stored with the data: Clock gained 1 minute 3 seconds over 20 days 6 hours 28 minutes 57 seconds; the cycle interval and time values have been corrected. Instrument Characteristics Station R1 OSTG Mark I, number 15 Sensors SG 1/D11 (BODC Series Ref. 41392) SG 1/D12 (BODC Series Ref. 41411) Nominal sampling interval 900 seconds Integration period 890 seconds -------------------- 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. ------------------------------------------------------------------------------- The following additional documents apply to this series: 27728; Off-Shore Tide Gauge Type I ===============================================================================