QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 28 Aug 2014
              Station  : St. Helena-B              Latitude:  15 55.0S          
              Country  : United Kingdom           Longitude: 005 43.0W
              JASL #   : 292B                 Time Meridian: 000E (GMT )
              GLOSS #  : 264      TOGA #: A037       NODC #: 51005501
              Contributor  : National Oceanography Centre
                             Proudman Oceanographic Laboratory
                             6 Brownlow Street                    
                             Liverpool L69 3GP
                             United Kingdom                                 
              Originator   : same
              Original Data: digital
              Instrmnt Type: Kalesto radar
              Digitzd Intvl: 15 minutes
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : spot hourly
                    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 Jan 2011 - 26 Feb 2013
              Gaps > 1 mon : none
              Time Refernce: GMT (00-23 hours)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : Yes                 Distribution        : 2011-2013
              Refernce Levl: This data set has not been calibrated to a datum.
                             However, the zero reference appears stable in 
                             comparison to the satellite altimetry data.
                             Use with discretion.
                             292B is separate from 292A since they are not
                             linked to the same datum.

              Comment      : This data set is referred to by NOC as Phase 1
                             radar, part of the ACCLAIM programme.

                             The history of the development of ACCLAIM is 
                             described in the report by Spencer et al. (1993):

                             Spencer, R., Foden, P.R., McGarry, C., Harrison, 
                                A.J., Vassie, J.M., Baker, T.F., Smithson, 
                                M.J., Harangozo, S.A. and Woodworth, P.L. 1993.
                                The ACCLAIM programme in the South Atlantic and
                                Southern Oceans.  International Hydrographic 
                                Review, 70, 7-21.


                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              2011  94 none                 (19)064-(08)065 none
                                            (23)193-(08)194
                                            (20)195-(08)196
              2012 100 none                 (07)278-(04)279 none
                                            (15)285-(23)285
              2013  16 none                 none            none