QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : San Felipe                Latitude:  31 01.1N
              Country  : Mexico                   Longitude: 114 49.1W
              JASL #   : 307A                 Time Meridian: 105W (GMT - 7 hr)
              GLOSS #  : none     TOGA #: none       NODC #: 73111401
              Contributor  : Servicio Mareografico Nacional                     
                             Instituto de Geofisica                             
                             Universidad Nacional Autonoma de Mexico            
                             04510 Mexico, D. F.                                
                             MEXICO                                             
              Originator   : same                                               
              Original Data: analog                                             
              Instrmnt Type: standard gauge with float and stilling well        
              Digitzd Intvl: hourly to tenths of feet                           
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : spot sample on the hour from the analog roll       
                    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 : 02 Jan 1982 - 09 Oct 1986
              Gaps > 1 mon : 06 Feb 1982 - 17 Oct 1982;14 Dec 1982 - 06 Nov 1983
                             24 Oct 1984 - 27 Feb 1985;10 Aug 1985 - 02 Oct 1985
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : No                  Distribution        : 1982-1986
              Refernce Levl: The data are referred to tide staff zero which is  
                             linked to fixed bench marks.                       
              Comment      : The daily and monthly values do not reveal any     
                             obvious reference level shifts or trends and agree
                             reasonably well with Guaymas.  The timing is poor
                             throughout the record.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1982  26 37-290,348-365       (12)006-(20)006 see comment above
                                            (13)007-(04)008
                                            (10)014-(18)014
                                            (10)017-(23)017
                                            (16)019-(01)020
                                            (22)023-(19)024
                                            (22)036-(16)037
              1983  15 1-310                none            see comment above
              1984  81 298-366              (21)046-(04)047 see comment above
                                            (16)048-(07)049
                                            (11)065-(21)065
                                            (22)103-(08)104
                                            (18)117-(01)118
                                            (09)189-(16)189
                                            (03)229-(16)229
                                            (05)230-(18)230
                                            (04)231-(11)231
                                            (06)291-(04)292
              1985  51 1-58,81-115,138-162, (04)180-(11)180 see comment above
                       222-275,283-295
              1986  77 none                 (13)074-(22)074 see comment above
                                            (12)169-(19)169
                                            (16)200-(23)200
                                            (14)260-(00)261