QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 08 Mar 2002 Station : Tioman Latitude: 02 48.4N Country : Malaysia Longitude: 104 08.4E JASL # : 323A Time Meridian: 120E (GMT + 8 hr) GLOSS # : none TOGA #: none NODC #: 10102401 Contributor : Dept. of Survey and Mapping Jalan Gurney 50578 Kuala Lumpur, Malaysia Originator : same Original Data: digital; samples taken every 10 sec; 50 sec average Instrmnt Type: Magnetic Tape Type Tide Gauge, Model LLT- 3AD (Kyowa Shoko Co. LTD, Japan) Digitzd Intvl: one hour Present Data : Hourly, daily, and monthly values obtained by: Hourly : Five-point least squares approximation (more information available from the address above) 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 : 13 Nov 1985 - 30 Nov 2001 Gaps > 1 mon : 29 Jan 1987 - 03 Mar 1987;16 Aug - 19 Sep 1991 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1985-2001 Refernce Levl: The sea level heights are referred to the zero point assigned to the tide gauge. Bench mark information is available upon request from the contributors. Comment : The daily and monthly means for Tioman agree well with an adjacent station, Kuantan. No reference level shifts are apparent. The periodic signatures in the residuals are believed to be due to the inability of the harmonic analysis to resolve completely some of the tidal constituents. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1985 13 none none See Comment Above 1986 100 none none See Comment Above 1987 91 29-62 none See Comment Above 1988 100 none none See Comment Above 1989 100 none none See Comment Above 1990 90 204-227,278-280, (08)250-(02)251 See Comment Above 306-312,338-343 1991 76 9-37,188-212, none See Comment Above 227-262 1992 100 none none See Comment Above 1993 100 none none See Comment Above 1994 96 131-144 none See Comment Above 1995 100 none none See Comment Above 1996 99 292-297 none See Comment Above 1997 100 none none See Comment Above 1998 100 none none See Comment Above 1999 100 none none See Comment Above 2000 100 none none See Comment Above 2001 91 none none See Comment Above