QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 25 Apr 2002 Station : Apia-B Latitude: 13 49.0S Country : Western Samoa Longitude: 171 45.0W JASL # : 401B Time Meridian: 165W (GMT - 11 hr) GLOSS # : none TOGA #: none NODC #: 51173101 Contributor : The National Tidal Facility (NTF) Flinders University of South Australia GPO Box 2100 Adelaide, 5001, South Australia AUSTRALIA Originator : same Original Data: digital Instrmnt Type: Aquatrak acoustic gauge (SEAFRAME) Digitzd Intvl: 6 minute Present Data : Hourly, daily, and monthly values obtained by: Hourly : filtering 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 : 27 Feb 1993 - 31 Dec 2001 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. : Yes Distribution : 1993-2001 Refernce Levl: The sea level heights are referred to the zero point assigned to the NTF tide gauge, which is linked to fixed points on land. Benchmark information is available upon request from the originators. Comment : The daily and monthly values are reasonable and do not reveal any obvious reference level shifts. SPECIAL NOTE FROM THE DATA CONTRIBUTORS: Supply of sea level data subject to the following conditions: i) When any data supplied by the National Tidal Facility is used in any publication or report, the origin of such data shall be acknowledged in that publication or report in the following approved form:-- "Tidal {predictions) for {port} {are} supplied {constants} {station} {is} {material} {...} by the National Tidal Facility, The Flinders University of South Australia, Copyright reserved." ii) All material is supplied in good faith and is believed to be correct. It is supplied on the condition that no warranty is given in relation thereto, that no responsibility or liability for errors or omissions is, or will be, accepted and that the recipient will hold the Flinders Univer- sity of South Australia and the National Tidal Facility free from all such responsibility or liability and from all loss or damage incurred as a consequence of any error or omission. iii) The acceptance of material and computations from the National Tidal Facility of the Flinders University of South Australia will be deemed to include acceptance of the conditions of supply. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1993 84 none none none 1994 100 none none none 1995 100 none (00)355-(00)356 none 1996 99 302-304 none none 1997 100 none none none 1998 100 none none none 1999 100 none none none 2000 100 none none none 2001 100 none none none