QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Puerto Quetzal-A          Latitude:  13 55.3N          
              Country  : Guatemala                Longitude: 090 47.1W          
              JASL #   : 301A                 Time Meridian: 090W (GMT - 6 hr)  
              GLOSS #  : none     TOGA #: none       NODC #: 71093001           
              Contributor  : UH SEA LEVEL CENTER                              
                             Dept. of Oceanography                              
                             University of Hawaii                               
                             Honolulu, Hawaii 96822                             
              Originator   : Instituto Nacional de Meteorologia y Hidrologia    
                             7A Avenida 14-57 Zona 13                           
                             Guatemala, C.A.                                    
                             GUATEMALA                                          
              Original Data: analog                                             
              Instrmnt Type: SEBA, float and well gauge                         
              Digitzd Intvl: hourly                                             
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : original digitized interval was 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 : 22 Nov 1983 - 05 Oct 1986                          
              Gaps > 1 mon : none                                               
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : No                  Operational         : No       
              Sat. Trans.  : No                  Distribution        : 1983-1984
              Refernce Levl: The data have been linked to tide staff zero by    
                             the contributors.  However, further analysis       
                             of the data has lead to adjustment of the          
                             reference level for one separate segment.          
                             The following adjustment was based upon            
                             analysis of the hourly residuals, and daily        
                             values.  These adjustment contain uncertainty      
                             to a few centimeters.                              
                                      period                value added         
                             ( (hour)day/month/year )       to original(mm)     
                             ---------------------------    ---------------     
                             (18)08/07/85 - (18)15/07/85          380           
                             This series is independent from P.Quetzal-B
                             because the two are not linked to the same datum.
              Comment      : The data contain numerous small gaps and the       
                             timing is poor as noted below.  The daily and      
                             monthly means do not show any signs of reference   
                             level shifts or trends.  However, the analysis of  
                             differences with Quepos, Costa Rica reveals a      
                             possible reference level shift during the gap      
                             on 12 February, 1985.                              
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1983  08 350-360,364-365      none            327-329,332-345,349-
                                                            350,362-364         
              1984  84 1-12,59-81,          (17)094-(02)095 14-15,17-27,32-33,  
                       120-124,160-166,     (12)138-(02)139 36-37,39,41-55,58-  
                       223-228,279-284,                     59,80-81,88-94,99-  
                       320-325,336-337                      112,114-116,124-138,
                                                            141-142,145-146,148-
                                                            149,152-156,166-174,
                                                            181-188,191-192,195,
                                                            198-204,207-217,219,
                                                            221-223,228-264,268-
                                                            277,286-289,291-292,
                                                            296-305,311-313,317,
                                                            319-320,325-331,342-
                                                            343,345-353,357-366 
              1985  93 40-41,42-43,         (06)186-(22)186 5-7,9,12-14,19-21,  
                       207-217,213-233,     (03)189-(14)189 32,38-39,44-52,54-  
                       237-239,271-275,                     57,66-67,69-74,80-  
                       289-294                              81,83-84,91-92,95-  
                                                            97,99,107,109-131,  
                                                            139-142,145-157,172-
                                                            173,178-192,195-196,
                                                            201-205,218-219,226-
                                                            230,234-237,239-242,
                                                            244-246,255-263,266-
                                                            267,269-270,275,277-
                                                            278,284-289,295-304,
                                                            313-315,317-323,332-
                                                            334,344-352,360-365 
              1986  73 10-15,51-52,         (20)002-(18)003 4-10,16-21,23-24,   
                       121-123,177-178,     (20)156-(07)157 26-31,33-36,41-47,  
                       248-249,279-365      (03)202-(16)202 54-55,60-65,68-69,  
                                                            71-73,85-109,111-   
                                                            120,124-138,143-150,
                                                            156-158,161-177,179,
                                                            185-186,199-247,250-
                                                            265,275-279