QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 16 Mar 2000 Station : Laohutan-A Latitude: 38 52.0N Country : China Longitude: 121 41.0E JASL # : 631A Time Meridian: 120E (GMT + 8 hr) GLOSS # : 079 Originator-#: 21061 NODC #: 13128102 Contributor : PRC National Oceanographic Data Center 118, Qiwei Road, Hedong District Tianjin, China Originator : same Original Data: analog Instrmnt Type: SCA2 float and well Digitzd Intvl: hourly Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot hourly 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 1991 - 31 Dec 1997 Gaps > 1 mon : none Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1991-1997 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 data are of good quality. Significant energy occurs with 1-5 day periodicity. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1991 100 none none none 1992 100 none (13)267-(21)267 none 1993 100 none none none 1994 100 none (15)218-(23)218 none (14)229-(23)229 (14)230-(23)230 (13)236-(20)236 (13)237-(21)237 1995 100 none (15)160-(23)160 none (13)161-(23)161 1996 99 336-337 (16)359-(23)359 none (13)361-(23)361 (15)362-(23)362 1997 99 365 (07)155-(03)156 none