QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       Updated: 12 Jul 2006
              Station  : Progreso-A, Yuc.          Latitude:  21 17.0N          
              Country  : Mexico                   Longitude: 089 40.0W          
              JASL #   : 721A                 Time Meridian: 090W (GMT - 6 hr)  
              GLOSS #  : 213  Originator #: PRG      NODC #: 72081901           
              Contributor  : Servicio Mareografico Nacional                     
                             Instituto de Geofisica                             
                             Universidad Nacional Autonoma de Mexico            
                             04510 Mexico, D. F.                                
                             MEXICO
              Originator   : same                                               
              Original Data: digital
              Instrmnt Type: float and stilling well
              Digitzd Intvl: 15 minutes                                       
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : 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 : 01 Jan 1980 - 31 Dec 1984
              Gaps > 1 mon : 01 Mar 1982 - 01 Apr 1982
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : No                  Distribution        : 1980-1984
              Refernce Levl: The sea level heights are referred to the station
                             tide staff zero which is surveyed to fixed
                             benchmarks on land.  Aux#1 is near the south edge
                             of the western half of the pier, 0.54ft from the
                             northeast edge of the iron bollard, 4.4ft north of
                             the south edge of the pier.  Aux#2 is 0.33ft west
                             of the face of the concrete curb and 0.4ft south
                             edge, between lamp post #34 and #35.
              Comment      : The daily and monthly values do not reveal any     
                             obvious reference level shifts or trends.          
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1980  99 1                    none            none
              1981 100 none                 none            none
              1982  92 60-91                (21)266-(10)267 none
              1983 100 none                 none            none
              1984 100 none                 none            none