BODC FIXED STATION DOCUMENT NO.  62215                     
                                                                                
                        Site History:  Ascension Phase 1                        
                        ==================================                      
    Station Name : Ascension Phase 1            Latitude :       7.917S         
    Country      : U.K.                        Longitude :      14.417W         
    Gloss No     : 263                    Time Reference : GMT(00-23 hours)     
    Contributor  : Proudman Oceanographic Laboratory                            
                   Bidston Observatory                                          
                   Prenton                                                      
                   CH43 7RA. U.K.                                               
                                                                                
    Observation Period  : Apr 1983 - Mar 1993, Nov 1993 - Jan 1995              
    Instrument Type     : Aanderaa tide gauge                                   
    Site of Gauge       : Clarence Bay, Ascension                               
                                                                                
    Please Note: These data should not be confused with the Ascension           
    Phase 2 data, recorded at English Bay. There are no links between           
    these two data sets.                                                        
                                                                                
    Parameters recorded :                                                       
                                                                                
         Period         CI(%)        Parameters         Sample Interval         
    =================   =====  ======================   ===============         
    04 1983 - 05 1985   99.4   ST,SSP                       60 mins             
    05 1985 - 10 1985   100    ST,SSP                       60 mins             
    10 1985 - 07 1986   100    ST,SSP                       60 mins             
    07 1986 - 05 1987   100    ST,SSP                       60 mins             
    05 1987 - 05 1988   99.8   ST,SSP                       60 mins             
    05 1988 - 01 1989   100    ST,SSP                       60 mins             
    01 1989 - 01 1990   100    ST,SSP                       60 mins             
    01 1990 - 09 1991   99.8   ST,SSP                       60 mins             
    10 1991 - 03 1993   100    ST,SSP                       60 mins             
    11 1993 - 01 1995   100    ST,SSP                       60 mins             
                                                                                
                                                                                
                                                                                
    where                                                                       
    ST = TEMPPR01 = Sea Temperature,                                            
    and  SSP = PRSTPS01 = Sub Surface (total) Pressure.                         
                                                                                
    The parameter SSP listed above should NOT be interpreted as Sea Level.      
    Firstly, SSP includes pressure loading from the height of water above       
    the sensor and from the air pressure above that. Secondly, many of the      
    sensors have long term drift.                                               
                                                                                
    Datum information is not available.                                         
    PLEASE NOTE: Datum can drift WITHIN AND BETWEEN files.                      
                                                                                
                                                                                
    Quality Assessment   :                                                      
                                                                                
    All data have been tidally analysed and constants and residuals             
    checked. Records  have been visually inspected for spikes and timing        
    shifts.                                                                     
                                                                                
                                                                                
         PERIOD         PARA                    COMMENTS                        
    =================   ====   =============================================    
    04 1983 - 05 1985   All    Gap: (1984) 099-101,320-322                      
                        SSP    Marked: (1995) 018                               
                        ST     Gap: (1983) 112-117, (1984)255-(1985)141         
    05 1985 - 10 1985   All    These data have uncertain timings, therefore     
                               must not be used by anyone, for tidal            
                               constant studies.                                
    10 1985 - 07 1986   All    None                                             
    07 1986 - 05 1987   All    None                                             
    05 1987 - 05 1988   All    Gap: (1988) 141-142                              
    05 1988 - 01 1989   All    Marked: (1988) 221                               
    01 1989 - 01 1990   ST     Marked: (1989) 077-102                           
    01 1990 - 09 1991   All    Gap: (1991) 250                                  
    10 1991 - 03 1993   All    Marked: (1991) 288                               
    11 1993 - 01 1995   All    None