QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 05 Jun 2000
              Station  : Angra Heroismo-A,Azores   Latitude:  38 39.0N
              Country  : Portugal                 Longitude: 027 14.4W
              JASL #   : 215A                 Time Meridian: 015W (GMT - 1 hr)  
              GLOSS #  : none     TOGA #: none       NODC #: 73028701           
              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 : 04 Jul 1957 - 28 Aug 1962
              Gaps > 1 mon : none                          
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Uncertain           Operational         : Uncertain
              Sat. Trans.  : No                  Distribution        : 1957-1962
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed bench marks    
              Comment      : This series is separate from Angra Heroismo-B due
                             to the gap in the data and uncertainties in the
                             linking of the data to the same zero reference 
                             point.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1957  50 none                 none            none
              1958 100 none                 none            none
              1959 100 none                 none            none
              1960 100 none                 none            none
              1961 100 none                 none            264
              1962  66 none                 none            36-39