QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 14 Aug 2002
              Station  : Canavieiras,USCGS         Latitude:  15 40.0S
              Country  : Brazil                   Longitude: 038 58.0W
              JASL #   : 707A                 Time Meridian: 045W (GMT - 3 hr)
              GLOSS #  : none     TOGA #: none       NODC #: 51035801
              Contributor  : National Ocean Service (NOS)                    
                             National Ocean. and Atmos. Administration (NOAA)
                             N/OES22
                             SSMC4, STATION 7109
                             1305 East West Highway
                             Silver Spring, MD. 20910-3233
                              and digitized by
                             University of Hawaii Sea Level Center
                             Honolulu, Hawaii 96822
              Originator   : US Coastal Geodetic Survey (USCGS)
              Original Data: analog                                             
              Instrmnt Type: standard float and well gauge
              Digitzd Intvl: hourly                                             
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : original digitized interval was 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 : 01 Feb 1956 - 31 Dec 1961
              Gaps > 1 mon : 01 Sep 1956 - 01 Oct 1956;01 Apr 1959 - 01 May 1959
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : No                  Operational         : No       
              Sat. Trans.  : No                  Distribution        : 1956-1961
              Refernce Levl: The data have been linked to tide staff zero by
                             the contributors.  Information on geodetic surveys
                             of benchmarks can be obtained from the originators.
                             The hourly data were key entered at the Univ. of
                             Hawaii.  Tide staff readings were provided and
                             reviewed.  It appears that the paper tables of 
                             hourly values had received the adjustments from 
                             the tide staff readings.  
              Comment      : Assumed original data in local time thus
                             time adjustment of +03 hours made.  The
                             residuals show indication of some short
                             timing offsets on occassion.
                                                                                
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1956  81 120-127,245-275      (15)071-(02)072 337-339
              1957  93 29-36,162-169,       (04)152-(15)152 76-82
                       325-335              (14)354-(03)355
              1958 100 none                 none            none
              1959  92 91-121               none            none
              1960 100 none                 (17)247-(02)248 30-34,71-74
              1961  98 302-309              (19)153-(03)154 1-2,75-77,132-138
                                            (13)157-(02)158