QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 14 Mar 2014 Station : Ile Royale Anse Legoff Latitude: 05 17.3N Country : France Longitude: 052 35.2W JASL # : 851A Time Meridian: 045W (GMT - 3 hr) GLOSS # : none Originator #: 545 NODC #: 70055202 Contributor : Service Hydrographique et Oceanographique de la Marine (SHOM) 13 Rue du Chatellier 29200 Brest Cedex, France Originator : 1) Direction de la Mer, Guyane, Unite Phares et Balises, Direction Departementale de l'Equipment de la Guyane, Service Maritime Fluvial et Aeroportuaire, subdivision of Phares et Balises 2) SHOM (digitization marigrams) Original Data: analog Instrmnt Type: float/well, OTT-R16 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 : 16 May 1989 - 06 Dec 2007 Gaps > 1 mon : 09 Jun 1989 - 27 Oct 1992;23 Jul 1994 - 11 Sep 1994 18 Aug 1994 - 26 Oct 1995;07 May 1996 - 26 Jun 1996 08 Nov 1996 - 23 Oct 1998;15 Dec 1998 - 23 Jan 1999 09 Feb 1999 - 24 Mar 2002;05 Apr 2002 - 25 Jul 2002 29 Sep 2004 - 15 Dec 2004;30 Jan 2006 - 29 Mar 2006 Time Refernce: GMT (00-23 hours) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : No Operational : No Sat. Trans. : No Distribution : 1989-2007 Refernce Levl: The data are referred to the zero point assigned to the tide station, linked to fixed benchmarks. Comment : The tide station is on the NE side of Ile Royale, within Iles du Salut, French Guiana. It had an OTT-R16 float/well gauge. Marigrams were digitized at one hour intervals by SHOM for the length of the series, 1989-2007. The overlap 2006-2007 with Ile Royale radar gauge, located nearby on the SE part of the island in Baie des Cocotiers, shows good agreement. The mean difference of the overlap is zero; thus, essentially the same reference zero. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1989 7 160-365 none none 1990 0 1-365 none none 1991 0 1-365 none none 1992 16 1-301,334-351 none none 1993 90 161-173,223-228,307- none none 318,337-345 1994 71 37-40,63-71,140-145, none none 156-160,204-254,282- 307,343-344,349-358 1995 65 101-118,157-173,188- (11)072-(01)073 none 210,230-299,328-332 1996 54 32-46,88-110,128- none none 178,212-227,241-250, 269-274,313-366 1997 0 1-365 none none 1998 14 1-296,349-365 none none 1999 5 1-23,40-365 none none 2000 0 1-366 none none 2001 0 1-365 none none 2002 40 1-83,95-206,220-241, none none 334-339 2003 100 none none none 2004 79 273-350 none none 2005 93 67-92 (14)061-(12)062 174 2006 73 30-88,148-156,183- none 28-30 186,285-313 2007 90 235-237,242-247,257- (11)189-(06)190 none 258,281-285