INFORMATION FOR BODC SERIES REF. NO.    34137                  
                                                                                
 ===============================================================================
                                                                                
                         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                                         
                                                                                
 ===============================================================================
                                                                                
 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.                               
                                                                                
 -------------------------------------------------------------------------------
                                                                                
 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                                              
                                                                                
 ===============================================================================