QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 07 Dec 2004
              Station  : Sisimiut,Holsteinsborg    Latitude:  66 56.0N
              Country  : Denmark                  Longitude: 053 40.0W
              JASL #   : 296A                 Time Meridian: 045W (GMT-3hrs)
              GLOSS #  : none     TOGA #: none       NODC #: 76056301
              Contributor  : Royal Danish Administration of Navigation
                             & Hydrography
                             Overgaden o.Vandet 62B
                             Postboks 1919,DK-1023
                             Copenhagen-K
                             DENMARK
              Originator   : same 
              Original Data: unconfirmed
              Instrmnt Type: pressure gauge
              Digitzd Intvl: unconfirmed
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : 1991-1995 unconfirmed; 1996- three-point Hanning
                             centered on the sample time closest to 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 : 10 Sep 1991 - 31 Dec 1998
              Gaps > 1 mon : 13 Nov 1992 - 11 Jan 1993;27 Sep 1994 - 04 Nov 1994
                             30 Dec 1995 - 01 Jul 1996;24 May 1997 - 27 Jun 1997
                             22 Jun 1998 - 11 Sep 1998
              Time Refernce: GMT (00-23 hours)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes
              Sat. Trans.  : No                  Distribution        : 1991-1998
              Refernce Levl: All data are referred to LAT, which is Chart Datum
                             for Greenland.
              Comment      : Data  up  to   June 26 1992  are  not  corrected  
                             for  atmospheric pressure.  Conversion  from total
                             pressure to pressure due to sea water has  been  
                             done  using a  fixed atm. pressure  of 1013 mbar.
                             After  June 26 1992 the data are corrected for 
                             atm. pressure using data from a pressure sensor 
                             placed on land. Salinity not measured, sea level
                             elevation  calculated  from  pressure using a sea 
                             water density based on  measured  temperature and
                             a salinity of 31.5ppt.  The data level is 
                             suspiciously high (10 cm) 11 Jan - 07 Jul 1993.
                             The signal also contains significant noise from 
                             07 Feb - 08 Mar 1993 and several top-hat signature
                             level jumps during this same period as well as on
                             20-21 Mar and 14 Apr 1993.
         
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1991  31 none                 none            none
              1992  85 178-186,318-366      none            none
              1993  97 1-11,187-189         (07)150-(01)151 38-67,79-80,186-187
              1994  89 270-308,332-336      none            none
              1995  99 236-240,265          none            none
              1996  50 1-183                none            none
              1997  91 144-178              none            none
              1998  78 173-254              none            none