QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                                                                
              Station  : Providenya-B              Latitude:  64 24.0N
              Country  : Russia                   Longitude: 173 12.0W
              JASL #   : 626B                 Time Meridian: 135E (GMT + 9 hr)
              GLOSS #  : 309      TOGA #: none       NODC #: 76174301
              Contributor  : All Russian Research Institute of         
                             Hydrometeorological Information - 
                             World Data Centre
                             6,Korolev Street, Obninsk
                             Kaluga 249020
                             RUSSIA
              Originator   : same
              Original Data: unconfirmed
              Instrmnt Type: float and stilling well gauge
              Digitzd Intvl: unconfirmed
              Present Data : Hourly, daily, and monthly values obtained by:
                    Hourly : unconfirmed
                    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 1986 - 31 Dec 1989
              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        : 1986-1989
              Refernce Levl: All data are levelled to fixed bench marks and the 
                             tide staff zero.  
                       Tide gauge benchmark (TGBM) description: 
                             BM Control  -5.0m (in the Baltic system)
              Comment      : The daily or monthly means do not reveal 
                             any obvious reference level shifts.  This
                             series is separate from Provideniya-A due
                             to a level shift of roughly 3 meters at
                             21 UTC 31 December 1985.
                             
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1986 100 none                 none            none
              1987 100 none                 none            none
              1988 100 none                 none            none
              1989  99 365                  none            none