QUALITY ASSESSMENT OF SEA LEVEL DATA                
                                           by the                               
                   UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER     
                                 JOINT ARCHIVE FOR SEA LEVEL                    
                                       updated: 05 Feb 2003
              Station  : Pisco-A                   Latitude:  13 25.0S
              Country  : Peru                     Longitude: 076 08.0W
              JASL #   : 683A                 Time Meridian: 075W (GMT - 5 hr) 
              GLOSS #  : none     TOGA #: none       NODC #: 51073601 
              Contributor  : Direccion Hidrografia y Navegacion de la Marina    
                             Camarra 500 Chuculto                               
                             Casilla Postal 80                                  
                             Callao, Peru                                       
              Originator   : same                                               
              Original Data: analog 
              Instrmnt Type: standard mechanical tide gauge 
              Digitzd Intvl: one hour 
              Present Data : Hourly, daily, and monthly values obtained by:     
                    Hourly : The original digitizing 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 : 15 Jan 1985 - 01 Apr 1990
              Gaps > 1 mon : 01 Feb 1985 - 01 Apr 1985;01 Jan 1986 - 04 Feb 1986
                             21 Feb 1986 - 01 Apr 1987;01 Jul 1986 - 01 Sep 1986
                             01 Nov 1987 - 01 Jan 1988;01 Mar 1988 - 07 Apr 1988
                             01 Feb 1989 - 01 Mar 1989;01 Jul 1989 - 01 Aug 1989
                             01 Nov 1989 - 01 Mar 1990
              Time Refernce: GMT (hours 00-23)   Space-filler Flag   :-9999     
              Units        : millimeters         Missing Data Flag   : 9999     
              Existing     : Yes                 Operational         : Yes
              Sat. Trans.  : No                  Distribution        : 1985-1990
              Refernce Levl: All heights have been referred to the station tide 
                             staff zero which is linked to fixed bench marks.
                             This series is separate from Pisco-B because 
                             a comparison with Callao suggests the mean level
                             of each series to be different with 683A about
                             200 mm lower than 683B.
              Comment      : The data from 1985 - 20 Jun 1989 were received
                             from the originators as decimeters.  The
                             residuals are noisy with many periods of
                             time shifts.

                    CI MISSING              REPLACED GAPS     QUESTIONABLE      
              YEAR (%) DATA                 OR BAD DATA       FLUCTUATIONS      
              ---- --- -------------------- --------------- --------------------
              1985  68 32-91,164-168,214-   (14)120-(04)121 17-18,256-257,268
                       244,254-255,272-273, (05)141-(04)142
                       353-357
              1986  61 1-35,52-91,181-244,  none            51,92-93,127-128,
                       281-288,365                          147-149,260-263,280
              1987  67 1-2,94-96,132-160,   (20)057-(06)058 81,279,286
                       233-251,264-274      (06)118-(18)118
                                            (04)162-(20)162
                                            (04)202-(21)202
                                            (20)057-(06)058
                                            (06)118-(18)118
                                            (04)162-(20)162
                                            (04)202-(21)202
              1988  82 1,17-21,61-98,112-   (02)178-(16)178 31-32,125-126,140-
                       114,220-221,223-229, (00)182-(16)182 143
                       303-305,322-323,340- (05)214-(16)214
                       342,356-357,359-366  (21)291-(12)292
                                            (19)298-(12)299
                                            (05)306-(14)306
                                            (00)343-(12)343
                                            (05)344-(12)344
                                            (14)348-(12)349
                                            (05)358-(12)358
              1989  66 1-4,27-28,32-60,92-  (18)023-(12)024 73-74,78,81,85-88,
                       94,102-105,182-213,  (05)091-(13)091 97-102,128,140-141,
                       305-365              (05)095-(12)095 154,169,213-305
                                            (05)150-(12)150
                                            (05)304-(04)305
              1990   8 1-60                 (03)089-(16)089 84-88