QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 11 Aug 1999 Station : Fortaleza-B Latitude: 03 43.0S Country : Brazil Longitude: 038 28.0W JASL # : 283B Time Meridian: 045W (GMT - 3 hr) GLOSS # : 336 TOGA #: none NODC #: 50033801 Contributor : LPAO/INPE Oceanografia Av. Dos Astronautas 1758 Sao Jose Dos Campos BRAZIL Originator : same Original Data: digital Instrmnt Type: Aanderaa, WLR-7 pressure gauge. THIS DATA SET IS NOT "SEA LEVEL" AS MEASURED BY CONVENTIONAL INSTRUMENTS. This bottom-mounted pressure gauge measures the column of water and air above it. The weight of the air is not measured and thus it is included in the final series. The conversion from pressure units to height for the water column uses a measured temperature and an assumed constant salinity of 37 psu with gravity at 9.81 m/s2 for the density estimation. Digitzd Intvl: 1 hour Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot sample 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 : 24 Nov 1995 - 29 Mar 1998 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 : 1995-1998 Refernce Levl: The data have been linked to tide gauge zero by the originators. INPE maintains geodetic survey information for this site. Comment : The data are of good quality. Site is on Petrobras Pier, on a deflection, about 800 m from the old float tide gauge (Port of Mucuripe, Fortaleza). CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1995 10 none none none 1996 100 none (02)306-(00)307 none (09)319-(23)319 1997 100 none none none 1998 24 none none none