QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 03 Jul 2013 Station : Qui Nhon-A Latitude: 13 46.0N Country : Vietnam Longitude: 109 15.0E JASL # : 381A Time Meridian: 105E (GMT + 7 hr) GLOSS # : 075 Originator #: 814 NODC #: 11103901 Contributor : Marine Hydro-meteorological Center No. 4 Dang Thai Than Street Hanoi VIETNAM Originator : same Original Data: analog (STD) Instrmnt Type: standard (STD) float/well Digitzd Intvl: hourly (STD) Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot digitization on the hour (STD) 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 1994 - 31 Dec 2005 Gaps > 1 mon : 31 Dec 1996 - 31 Dec 1999;31 Dec 2000 - 31 Dec 2002 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : yes Sat. Trans. : No Distribution : 1994-2005 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. Tide Gauge Zero (TGZ) = Admirality Chart Datum. TGZ = 3.546m below TGBM. TGBM: bolt outside of tide gauge shelter, adjacent to front wall of shelter. 381A and 381B are separate because they have unique reference zeros. Comment : The daily and monthly means reveal no apparent changes in the reference level. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1994 100 none none none 1995 100 none none none 1996 99 365 none none 1997 0 1-365 none none 1998 0 1-365 none none 1999 0 1-365 none none 2000 99 366 none none 2001 0 1-365 none none 2002 0 1-365 none none 2003 100 none none none 2004 100 none none none 2005 99 365 none none