QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 22 Feb 2008 Station : Vung Tau-A Latitude: 10 20.4N Country : Vietnam Longitude: 107 04.3E JASL # : 383A Time Meridian: 105E (GMT + 7 hr) GLOSS # : none Originator #: none NODC #: 11100701 Contributor : Marine Hydro-meteorological Center No. 4 Dang Thai Than Street Hanoi VIETNAM Originator : same Original Data: analog Instrmnt Type: float/well Digitzd Intvl: hourly Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot digitization 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 : 01 Jan 1986 - 31 Dec 2002 Gaps > 1 mon : 31 Aug 1989 - 30 Sep 1989;28 Feb 1990 - 30 Apr 1990 31 Aug 1991 - 30 Nov 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 : 1986-2002 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. 383A is separate from 383B since both have unique reference zeros. Comment : The daily and monthly means reveal no apparent changes in the reference level. Timing is off at times on the order of minutes during 1986-1999. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1986 100 none none see comment above 1987 100 none none see comment above 1988 100 none none see comment above 1989 92 243-273 none see comment above 1990 83 59-120 none see comment above 1991 75 243-334 none see comment above 1992 100 none none see comment above 1993 100 none none see comment above 1994 100 none none see comment above 1995 100 none none see comment above 1996 100 none 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 none 2001 100 none none none 2002 100 none none none