QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 25 May 2017
              Station  : Sandakan                  Latitude:  05 48.6N
              Country  : Malaysia                 Longitude: 118 04.0E
              JASL #   : 389A                 Time Meridian: 120E (GMT + 8 hr)
              GLOSS #  : none Originator #: SDK      NODC #: 10115801
              Contributor  : Dept. of Survey and Mapping                        
                             Jalan Gurney                                       
                             50578 Kuala Lumpur, Malaysia                       
              Originator   : same                                               
              Original Data: digital; samples taken every 10 sec; 50 sec average
              Instrmnt Type: Magnetic Tape Type Tide Gauge, Model LLT-          
                             3AD (Kyowa Shoko Co. LTD, Japan)                   
              Digitzd Intvl: one hour                                           
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : Five-point least squares approximation (more       
                             information available from the address above)      
                    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 : 24 Dec 1993 - 31 Dec 2015
              Gaps > 1 mon : 11 Jan 1999 - 11 Mar 1999;21 May 2013 - 27 Jun 2013
                             22 Oct 2014 - 13 Dec 2014
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : No                  Distribution        : 1993-2015
              Refernce Levl: The sea level heights are referred to the zero     
                             point assigned to the tide gauge. Bench mark       
                             information is available upon request from the     
                             contributors.                                      
              Comment      : The daily and monthly means do not reveal any      
                             obvious reference level shifts or trends and
                             agree well with the closest site, Tawau.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1993   2 none                 none            none
              1994 100 none                 none            none
              1995 100 none                 none            none
              1996  97 332-343              none            none
              1997  99 109-112              none            none
              1998 100 none                 none            none 
              1999  76 11-70,335-352        none            none
              2000 100 none                 none            none
              2001 100 none                 none            none
              2002  96 322-337              none            none
              2003 100 none                 none            none
              2004 100 none                 none            none
              2005 100 none                 none            none
              2006 100 none                 none            none
              2007 100 none                 none            none
              2008 100 none                 none            none
              2009 100 none                 none            326-354
              2010 100 none                 none            none
              2011  95 327-335,356-365      none            none
              2012  89 1-14,269-295         none            none
              2013  89 141-178,204-206      none            none
              2014  80 240-262,295-347      none            none
              2015 100 none                 none            none