INFORMATION FOR BODC SERIES REF. NO.    34278                  
                         Sea Floor Pressure Gauge Inventory Number :   6966     
 Start Time : 10 Aug 1980 1630 GMT                  Latitude  :  34deg 12.8min N
 End Time   : 24 Nov 1980 0530 GMT                  Longitude : 028deg 54.6min W
 Nominal Cycle Interval   : 3600.0 secs         Sensor Depth    :   3577.00m    
                                                Sea Floor Depth :   3577.00m    
 Positional Uncertainty   : 0.1 to 0.5 n.miles                                  
 Depth Datum              : Mean sea level                                      
 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  : 8014/980/223                                        
 Additional information stored with the data:                                   
    Station A4, North Atlantic.                                                 
    Sampling was every 30 minutes, alternate pressure and temperature readings. 
    For the temperature correction, temperature was calculated as a mean of the 
    two adjacent temperatures for  each  pressure  frequency.   Clock  lost  34 
    seconds  over  135  days, 14 hours; the cycle interval and time values have 
    been corrected.                                                             
    Instrument characteristics and calibration factors                          
           Aanderaa Pressure Recorder TG-4A, sensor DIG, serial number 281      
           Original sampling interval          60 minutes                       
           Integration period                         27s                       
           Temperature coefficient       21.68counts/degC                       
           Pressure sensitivity           0.3086counts/mb                       
                                           (at 0.964degC)                       
           To convert pressure to elevation the following                       
           values should be used:                                               
           Density                           no CTD casts                       
           Gravitational acceleration constant  9.797m/s2                       
 The following additional documents apply to this series:                       
  27731; I.O.S. Calibration and Data Processing of Off-Shore Tide Gauge Data    
  27823; Aanderaa Pressure Recorder Type TG-4A