QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Colombo-A                 Latitude:  06 56.0N          
              Country  : Sri Lanka                Longitude: 079 51.0E          
              JASL #   : 115A                 Time Meridian: 82.5E (GMT + 5.5)  
              GLOSS #  : 033      TOGA #: I035       NODC #: 10076901           
              Contributor  : National Aquatic Resources Agency                  
                             Crow Island, Mattakkuliya                          
                             Colombo-15                                         
                             Sri Lanka                                          
              Originator   : same                                               
              Original Data: unknown                                            
              Instrmnt Type: unknown                                            
              Digitzd Intvl: unknown                                            
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : unknown                                            
                    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 1953 - 31 Dec 1965                          
              Gaps > 1 mon : 1 Jan - 1 Feb 1957; 1 Dec 1964 - 1 Apr 1965        
              Time Refernce: local (GMT + 5.5)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : No                  Operational         : No       
              Sat. Trans.  : No                  Distribution        : 1953-1965
              Refernce Levl: The sea level heights are referred to the          
                             zero point assigned to the tide staff. Bench       
                             mark information is available upon request.        
              Comment      : The daily and monthly means do not show any        
                             signs of reference level shifts or trends.  The    
                             monthly means agree well with an adjacent station, 
                             Cochin, India.                                     
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1953  94 1,263-264,276-       (00)289-(07)289 none                
                       278,290-295,         (18)289-(08)290                     
                       306-310,325-327,     (15)295-(09)296                     
                       346-348                                                  
              1954  99 290-291              (08)012-(07)013 43-44               
                                            (08)059-(07)060                     
              1955  99 225-227              (08)151-(07)152 none                
              1956  98 131-134,336-338      (14)125-(10)126 none                
                                            (08)182-(07)183                     
                                            (08)187-(07)188                     
              1957  88 1-32,148-151,        (08)059-(07)060 none                
                       254-257,358-360      (08)090-(07)091                     
                                            (08)120-(07)121                     
                                            (08)274-(07)275                     
              1958  99 1-2                  (08)120-(07)121 5-6,178-180,269-270,
                                                            340-341,347         
              1959  99 102-103              (02)110-(11)110 144,170-171,258-259,
                                            (08)179-(07)180 338-341             
              1960  95 12-15,90-92,247-     (12)142-(11)143 50,52-53,95-97      
                       249,303-305                                              
              1961  96 118-122,302-312      none            34-37               
              1962  99 137-141              (20)141-(07)142 230,299-300         
              1963  97 122-131              (08)115-(07)116 none                
                                            (08)272-(07)273                     
              1964  90 307-309,319-321,     none            18-19,130-131,      
                       336-366                              120-121             
              1965  74 1-91,121-123         (08)106-(07)107 107-108,120-121,200-
                                            (08)213-(07)214 201,212,214-216,224-
                                                            226,296-297,310-311,
                                                            323,342-343,358-360