QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Horta,Azores              Latitude:  38 32.0N
              Country  : Portugal                 Longitude: 028 37.3W
              JASL #   : 212A                 Time Meridian: 015W (GMT - 1 hr)  
              GLOSS #  : none     TOGA #: none       NODC #: 73028801           
              Contributor  : Instituto Hidrografico Marinha                     
                             Rua das Trinas                                     
                             49-P-1296 Lisboa Codex                             
                             Lisbon
                             PORTUGAL
              Originator   : same                                               
              Original Data: analog
              Instrmnt Type: Float and well, A.OTT
              Digitzd Intvl: hourly
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : the original data were hourly
                    Daily  : 119-point convolution filter (Bloomfield, 1976)    
                             centered on noon applied to the hourly data        
                             with respective periods of the 95, 50, and 5%      
                             amplitude points at 124.0, 60.2, and 40.2 hours    
                    Monthly: Simple average of all daily values; calculated if  
                             7 or fewer days are missing                        
              Span of data : 01 Jan 1984 - 30 Jun 1986                          
              Gaps > 1 mon : 04 Oct 1985 - 17 Jan 1986                          
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Uncertain           Operational         : Uncertain
              Sat. Trans.  : No                  Distribution        : 1984-1986
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed bench marks    
              Comment      : The daily and monthly means reveal no              
                             apparent reference level changes or trends.        
                             The daily data agree well with Flores,Azores.      
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1984  98 346-353              none            none                
              1985  76 277-365              none            38-39               
              1986  44 1-17,27-29           none            none