QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 08 May 2000
              Station  : South Pass, LA            Latitude:  28 59.4N
              Country  : USA                      Longitude: 089 08.4W
              JASL #   : 764A                 Time Meridian: 090W (GMT - 6 hr) 
              GLOSS #  : none Originator #:8760551   NODC #: 72088901
              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
              Originator   : same
              Original Data: digital
              Instrmnt Type: Aquatrak acoustic gauge, NOAA Next Generation 
                             Water Level Measuring System (NGWLMS) 
              Digitzd Intvl: six-minute 
                             NGWLMS sampling is three-minute average
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : spot sampling 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 : 29 Mar 1993 - 31 Jan 1999
              Gaps > 1 mon : 11 Sep 1993 - 10 Mar 1994
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : Yes                 Distribution        : 1993-1999
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed bench marks. 
                             While standard mechanical or ADR instrument was the
                             primary gauge, leveling calibration factors were
                             applied monthly based on tide staff comparisons.
              Comment      : The daily and monthly means reveal no apparent     
                             reference level changes, although this series
                             does exhibit an upward mean trend.

                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1993  46 254-365              none            none
              1994  81 1-69                 (00)252-(09)252 none
              1995  97 344-345,354-363      none            none
              1996  99 61-62                (03)007-(10)007 none
                                            (00)010-(09)010
                                            (00)013-(12)013
                                            (00)028-(09)028
                                            (01)122-(23)122
              1997 100 none                 (15)167-(12)168 none
              1998  98 21-24,344-350        none            none
              1999   8 none                 none            none