QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                 Updated: 12 Apr 2019                   
              Station  : Palmyra Island-B          Latitude:  05 53.3N
              Country  : USA Trust                Longitude: 162 05.0W
              JASL #   : 043B                 Time Meridian: 150W (GMT - 10 hr)
              GLOSS #  : none Originator #: 043      NODC #: 7016520 
              Contributor  : UH Sea Level Center 
                             1000 Pope Rd. MSB 317                              
                             Honolulu, Hawaii 96822
              Originator   : same
              Original Data: digital
              Instrmnt Type: 1) 11/2012-, Bubbler (BUB)
                             2) 11/2012-, Radar (RAD), Vega Vegapuls 62
                             3) 11/2012-, Pressure transducer (PRS)

                             Primary channel used in JASL set:
                             2012-: RAD 
                            *short gaps in primary channel filled with
                             other channels as available; see UHSLC for
                             specific dates
              Digitzd Intvl: 10 min (BUB), 2 min (RAD), 2 min (PRS)
              Present Data : Hourly, daily, and monthly values obtained by:
                    Hourly : three-point Hanning filter centered 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 Nov 2012 - 31 Dec 2018
              Gaps > 1 mon : 01 Apr 2018 - 03 May 2018
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes      
              Sat. Trans.  : Yes                 Distribution        : 2012-2018
              Refernce Levl: Heights are referred to the station tide staff 
                             zero, which is linked to land-based benchmarks. 
                             This reference zero is unique to this station and
                             is not an official datum (chart, national, etc.) 
                             and is not relative to local tidal parameters, 
                             such as mean lower low water.  See the Originators
                             for benchmark descriptions, maps, and the geodetic
                             levelling history.
              Comment      : The daily and monthly means reveal no apparent     
                             changes in the reference level.  

                             The JASL update of 12 Apr 2019 replaces 01 Jan
                             2016 - 05 Sep 2017. 
                                                                               
                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              2012   9 none                 none            none
              2013 100 none                 (00)065-(16)065 none
                                            (13)174-(23)174
                                            (01)235-(08)235
              2014 100 none                 none            none
              2015 100 none                 none            none
              2016 100 none                 (08)058-(15)058 none
              2017 100 none                 none            none
              2018  91 89-123               (10)081-(18)081 none
                                            (04)082-(19)082
                                            (04)083-(20)083
                                            (03)084-(22)084
                                            (01)085-(21)085
                                            (01)086-(23)086
                                            (01)087-(23)087
                                            (02)088-(22)088
                                            (21)233-(13)234