QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 15 Oct 2001
              Station  : St. John's-B              Latitude:  47 34.0N
              Country  : Canada                   Longitude: 052 42.0W
              JASL #   : 276B                 Time Meridian: 053W (GMT-3.5 hr) 
              GLOSS #  : 223  Originator #: 00905    NODC #: 74057201
              Contributor  : Marine Environmental Data Service
                             Dept. of Fisheries and Oceans
                             S12082-200 Kent St.
                             Ottawa, Ontario
                             CANADA K1A-OE6
              Originator   : Dept. of Fisheries
                             Atlantic Tidal Section
                             BIO, P.O. Box 1006
                             Dartmouth, N.S.
                             CANADA B2Y 4A2
              Original Data: digital 
              Instrmnt Type: bubbler gauge was installed which utilizes the  
                             tidal acquisition telemetry system 
              Digitzd Intvl: 15 minutes
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : three-point Hanning filter centered on the hour
                    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 Jun 1993 - 31 Dec 2000
              Gaps > 1 mon : 30 Jan 2000 - 04 Mar 2000
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999   
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : Yes                 Distribution        : 1993-2000
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed benchmarks.
                             The primary benchmark is BM 76F27, a Geodetic 
                             Survey of Canada (GSC) tablet which is located
                             horizontally in the SE foundation, 1.1m from south
                             corner, 0.15m below brick siding of the St.
                             John's Ministry of Transport depot building. 
                             Elevation 4.412m above CD.
              Comment      : The hourly residuals show significant fluctuations
                             within the tidal frequency band.  It is most likely
                             due to the inability of the tidal analysis to 
                             completely resolve the complex nature of the 
                             tides.  Only extreme fluctuations are noted below.
                             The series, St. John's-A (1961-5/1993) hourly
                             data are relative to the local time zone 
                             (GMT-3.5 hours).  After 5/31/1993,
                             a new series, St. John's-B, is established 
                             relative to the same datum but with the time zone
                             related to GMT, since 15-minute data were 
                             available for performing this time zone shift.
                             Data for 30 Jan - 04 Mar 2000 appeared corrupted
                             and were removed from the final archive.
                             
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1993  58 none                 none            none
              1994 100 none                 none            none
              1995 100 none                 (11)226-(03)227 234,254-255
              1996  98 309-317              none            none
              1997  99 167-172              none            none
              1998  93 31-43,68-71,109-118  (21)123-(14)124 none
              1999  99 132-136              none            54,262,293
              2000  89 31-64,117-120,       none            none
                       138-140,143-144