QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Cordova-A,Alaska          Latitude:  60 33.5N
              Country  : USA                      Longitude: 145 45.2W
              JASL #   : 583A                 Time Meridian: 135W (GMT - 9 hr)
              GLOSS #  : none Originator #:9454050   NODC #: 76140501
              Contributor  : National Ocean Service (NOS)                       
                             National Ocean. and Atmos. Administration (NOAA)   
                             N/OES22
                             SSMC4, STATION 7109
                             1305 East West Highway
                             Silver Spring, MD. 20910-3233
              Originator   : same                                               
              Original Data: analog (standard)
              Instrmnt Type: standard analag gauge (float/well)
              Digitzd Intvl: hourly (standard)
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : The original digitizing interval was hourly        
                             (standard)
                    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 : 14 May 1949 - 01 Mar 1953
              Gaps > 1 mon : none
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : No                  Distribution        : 1949-1953
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed bench marks.
                             While standard mechanical or ADR instrument was the
                             primary gauge, leveling calibration factors were
                             applied monthly based on tide staff comparisons.
              Comment      : The link between the reference levels of Cordova-A
                             and Cordova-B has not been established.  It is
                             unknown if the gauges were physically at the same
                             site.  Only extreme fluctuations in the residual
                             plots are noted below.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1949  63 none                 none            none
              1950 100 none                 (15)125-(02)126 151-152
              1951  95 141-149,150-152,154- (10)042-(09)043 none
                       160,287-289          (10)133-(17)133
                                            (02)134-(18)134
                                            (02)150-(10)150
                                            (17)152-(12)153
                                            (18)153-(12)154
                                            (05)166-(01)167
                                            (18)169-(03)170
              1952  82 28-31,33-34,37-41,   (11)074-(18)074 none
                       56-58,61-73,87-88,   (12)086-(01)087
                       89-101,111-121,124-  (03)140-(02)141
                       129,214-221,237-240, (09)149-(07)150
                       352-356,360-361,364- (08)347-(06)348
                       366                  (19)363-(04)364
              1953  17 none                 (10)025-(09)026 none