QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Victoria Dock Latitude: 01 15.8N ? Country : Singapore Longitude: 103 49.3E ? JASL # : 337A Time Meridian: 120E (GMT + 8 hr) GLOSS # : 044 TOGA #: none NODC #: 10101305 Contributor : Port of Singapore Authority PSA Building 460 Alexandra Road Singapore 0511 Originator : same Original Data: analog ? Instrmnt Type: A.OTT Float Type ? Digitzd Intvl: 1 hour ? Present Data : Hourly, daily, and monthly values obtained by: Hourly : digitized from chart paper ? 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 Jan 1972 - 31 Dec 1981 Gaps > 1 mon : 27 Mar - 30 Apr 1974 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : No Operational : No Sat. Trans. : No Distribution : 1972-1981 Refernce Levl: The sea level heights are referred to the chart datum which is also the zero level of the tide gauge. Bench mark information is available upon request from the contributors. Comment : The residual series are noisy (note questionable fluctuations below), which is probably due to shallow water tides that are not resolved by the harmonic analysis or due to timing drifts of less than 15 minutes. The daily and monthly means do not reveal any apparent reference level shifts. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1972 90 82-105,211-218, (02)137-(21)137 19-20,33-36,42-43, 330-333,354-357, (10)144-(01)145 45-51,61-64,73-80, 365-366 (02)177-(16)177 105-106,143,171-173, (07)363-(21)363 196-198,225-227,253- 254,279-283,297-300, 306-308,313,322,326- 330,334-336 1973 83 1-4,120-130, (13)005-(01)006 9,13,35-42,48-50,69- 198-201,204-205, (12)015-(00)016 74,78-79,133-134, 207-216,219-227, (17)240-(08)241 157-163,185-190,241- 229-235,238-240, (17)242-(02)243 247,313,323-327,349- 248-254,261-264, (04)355-(23)355 354 267-269,292-299, (17)365-(23)365 307-309,344-347 1974 89 44-46,47-49, (17)214-(23)214 6-16,38-44,52-64,66- 76-77,82-84, (07)337-(15)337 70,85,122-126,130, 86-120,357-359 145,149-152,175-178, 204-206,208-210,230- 234,238-239,252,258- 262,266-267,286-292, 312-316,341-344 1975 97 42-44,47-48, (21)032-(06)033 2-7,52,78-79,85-87, 55-62 (04)037-(12)037 113-114,140-143,167- (05)162-(02)163 174,192-203,207-210, 222-230,249-256,277- 283,286,306-308,311- 312,322,329,331-334, 349-353,361-363 1976 98 46-48,285-287, (14)003-(13)004 5,11,23-24,32-33,39- 297-302 (10)270-(02)271 40,48-49,62-69,75- 79,104-107,118-119, 131-133,158-161,181, 187-190,210,213-216, 229,240-242,267-269, 272-274,287-288,296- 297,322-325,351-352, 361 1977 99 52-53,214-217 (10)019-(02)020 13-16,41-42,48-51, (04)132-(16)132 53,65,113,119,158, (16)132-(04)133 177-179,229-232, 257-262,285-286,310- 313,339-341 1978 99 37-40,82-84 (02)328-(00)329 4-5,116-117,204-205, 277,299,307-309,358, 359 1979 98 73-82 (17)151-(23)151 33-37,61-62,168-169, 272 1980 100 none (16)237-(15)238 47-48,186,220,340 1981 99 365 none 2,10-14,39-42,69, 110-111,124,135,204, 246,273-274,282,295- 297,317-318,340-341, 353-356