QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 19 Dec 2023
              Station  : Hon Dau-B                 Latitude:  20 40.0N
              Country  : Vietnam                  Longitude: 106 49.0E          
              JASL #   : 650B                 Time Meridian: 105E (GMT + 7 hr) 
              GLOSS #  : none     TOGA #: none       NODC #: 12100601           
              Contributor  : Transport Engineering Design Incorporation
                             278 Ton Duc Thang Street
                             Hanoi
                             VIETNAM
              Originator   : unconfirmed
              Original Data: analog
              Instrmnt Type: float/well with paper roll recording mechanism
              Digitzd Intvl: hourly
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : spot digitization 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 : 31 Jan 1995 - 31 Dec 1995
              Gaps > 1 mon : 30 Aug 1995 - 31 Oct 1995
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes
              Sat. Trans.  : No                  Distribution        : 1995-1995
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed benchmarks.
                             This site is unique to Hon Dau-A because the series
                             are not linked to the same datum.
              Comment      : The daily  and monthly means reveal no apparent    
                             changes in the reference level.  The high values
                             on Aug 31 1995 and Nov 1 1995 are suspicious but
                             may be weather related.
                             Dec 2023 - The timeseries was corrected so that
                             data are now on GMT.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1995  75 242-304,365          none            none