QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 14 Jun 2004 Station : Surabaya Latitude: 07 12.5S Country : Indonesia Longitude: 112 43.5E JASL # : 160A Time Meridian: 105E (GMT + 7 hr) GLOSS # : 292 Originator #: 00200 NODC #: 30117201 Contributor : BAKOSURTANAL, Indonesia J1. Raya Jakarta Bogar Km 46 P. O. Box 46 Cibinong, Indonesia Originator : same Original Data: analog Instrmnt Type: Fischer and Porter 1550, float and well gauge Digitzd Intvl: one hour spot reading 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 : 31 Jan 1984 - 30 Nov 2004 Gaps > 1 mon : 18 Apr 1989 - 28 Jun 1989 02 Jan 1991 - 01 Mar 1991;31 Aug 1992 - 31 Dec 1992 30 Apr 1994 - 01 Dec 1994;31 Jan 1998 - 03 Mar 1998 30 Nov 1998 - 31 Dec 1998;01 Jun 2000 - 02 Aug 2000 04 Nov 2001 - 21 Jan 2002;18 Feb 2002 - 01 Jul 2002 01 Oct 2002 - 19 Nov 2002;01 Jan 2003 - 28 Jan 2003 30 Jun 2003 - 27 Aug 2003 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1984-2004 Refernce Levl: The sea level heights are referred to the zero point assigned to the tide staff, which is 3.691m below TTG.1030. Comment : Data were removed due to obvious level jumps in Jan-Feb 2003 and Dec 2004. If the originators can provide corrections, then the data will be put back into the series. The hourly residuals have a noisy signature possibly due to the tidal analysis not being able to resolve all the harmonics in this area of complex geography. Only very large fluctuations in the residuals are noted below. There are suspicious level jumps in Aug-Sep 1987. The residuals show a contaminated signal for all of 1995, either stilling well blockage or a instrumental mechanical problem. Use these data with discretion. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1984 91 303-305 none none 1985 100 none (17)315-(00)316 none 1986 99 117-120,302-304 none 287-304 1987 99 365 (12)250-(19)250 1-2 1988 95 1-12,16-18,23-25, (02)295-(01)296 none 265-268 (08)332-(14)332 (02)359-(00)360 1989 81 36-37,108-179 none none 1990 99 27-29,286-288 none none 1991 79 2-60,105-108,121- (23)182-(06)183 60-63,131-120,178- 126,204-213,312-315 (19)356-(02)357 181,350-356 1992 65 2-5,181-183,244-366 (08)044-(02)045 75-77,126-142,147- (03)184-(02)185 152,161-170 (08)212-(02)213 1993 98 208-214,271-272, (17)059-(02)060 191-207 282-284 (08)060-(01)061 (18)182-(01)183 (17)190-(02)191 1994 38 4-7,22-25,44-47,59- (11)040-(21)040 none 61,89-92,120-335 (05)061-(02)062 (11)088-(18)088 (08)358-(16)358 (13)359-(21)359 1995 99 104-107 (19)151-(02)152 see comment above (06)275-(17)275 (14)304-(03)305 1996 84 5-6,64-67,197-199, (13)053-(23)053 362-365 275-298,305-313, (16)098-(03)099 336-359 (01)100-(09)100 (11)100-(19)100 (00)328-(16)328 1997 90 1-2,31-34,64-66,181- none 24-31,60-64 188,241-244,320-321, 335-339,343-344,347- 348,351-365 1998 81 1-2,31-62,170-174, none 94-97,111,176-181 187-189,334-365 192-200,282-288 1999 76 8-14,25-26,55-57,58- none 14-25,35-55,60-62, 60,73-74,82-109,235- 74,77-82,254-257 237,244-251,258-259, 262-284,288-291,306- 307,309-313,355-365 2000 68 1-4,14-32,98-105, none 4-14,95-98 153-215,276-306, 361-362 2001 82 123-124,230-231,252- none 1-31 254,260-265,308-365 2002 35 1-21,31-35,49-182, none 24-28,38-48,196-216 221-228,233-238,247- 266,274-323 2003 61 1-59,133-140,181- none 340,344-346 239,243-245,291-295, 353-358,359-365 2004 71 2-6,86-91,190-192, none 32-86,197-199,315- 235-236,300-307,319- 335 322,335-366