QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL Station : Hon Dau-A Latitude: 20 40.0N Country : Vietnam Longitude: 106 49.0E JASL # : 650A Time Meridian: 105E (GMT + 7 hr) GLOSS # : none TOGA #: none NODC #: 12100601 Contributor : Marine Hydro-meteorological Center No. 4 Dang Thai Than Street Hanoi VIETNAM Originator : unconfirmed Original Data: analog Instrmnt Type: float/well with paper roll recording mechanism 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 : 31 Dec 1959 - 31 Dec 1960 Gaps > 1 mon : none Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : No Operational : No Sat. Trans. : No Distribution : 1960-1960 Refernce Levl: All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. This series is separate from Hon Dau-B because it is not linked to the same datum. Comment : The daily and monthly means reveal no apparent changes in the reference level. Dec 2023 - The timeseries was corrected so that data are now on GMT. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1960 100 none none none