QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Las Palmas-A              Latitude:  28 06.0N          
              Country  : Spain                    Longitude: 015 24.0W          
              JASL #   : 217A                 Time Meridian: GMT                
              GLOSS #  : 251      TOGA #: A024       NODC #: 72018501           
              Contributor  : Instituto Espanol de Oceanografia                  
                             C/ Corazon de Maria, No. 8 - 1                     
                             28002 Madrid                                       
                             SPAIN                                              
              Originator   : same                                               
              Original Data: analog                                             
              Instrmnt Type: A.OTT, float and stilling well                     
              Digitzd Intvl: one hour                                           
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : direct digitization, no filter                     
                    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 : 17 Apr 1949 - 16 Oct 1956
              Gaps > 1 mon : 18 Dec 1953 - 21 Mar 1954;18 Jun - 25 Jul 1956
              Time Refernce: GMT (00-23 hours)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : No                  Operational         : No
              Sat. Trans.  : No                  Distribution        : 1949-1956
              Refernce Levl: The data have been linked to tide staff zero       
                             and fixed bench marks by the originators.
                             A level shift was identified in the series and
                             adjusted as follows:
                                                            value added         
                             period( day/month/year )       to original(mm)     
                             ------------------------       ---------------     
                             27/04/1952 - 06/08/1952             -130

                             This adjustment is uncertain to a few cm.
              Comment      : The timing of the data is good until 1955.  No
                             obvious level shifts are apparent
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1949  71 none                 none            none
              1950 100 none                 none            none
              1951 100 none                 none            none
              1952 100 none                 none            none
              1953  93 322-333,352-365      none            none
              1954  78 1-80                 none            235-246
              1955 100 none                 none            228-231,242-250
              1956  69 170-207              none            46-47,244-245,
                                                            287-289