QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 14 Nov 2019 Station : Settlement Point-B Latitude: 26 41.4N Country : Bahamas Longitude: 078 59.0W JASL # : 257B Time Meridian: 075W (GMT - 5 hr) GLOSS # : 211 Originator #: 257 NODC #: 72076801 Contributor : UH Sea Level Center University of Hawaii at Manoa Honolulu, Hawaii 96822 USA Originator : same Original Data: digital Instrmnt Type: 1) 2002-2012: Aquatrak acoustic gauges ECS 2) 08/2005- radar (RAD) gauge (Vega Vegapuls 62) 3) 08/2005- pressure transducer (PRS) 4) 01/2011- radar (RA2) gauge, secondary Primary channel used in JASL set: 2002-08/2005: ECS 08/2005-2018: RAD *short gaps in primary channel filled with other channels as available; see UHSLC for specific dates Digitzd Intvl: 6 min ECS, 3 min RAD, 2 min PRS, 2 min RA2 Present Data : Hourly, daily, and monthly values obtained by: Hourly : 3-pt Hanning filter centered 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 : 04 Jun 2002 - 31 Dec 2018 Gaps > 1 mon : 28 Apr 2003 - 27 May 2003;20 Jun 2003 - 29 Aug 2003 01 Nov 2003 - 30 Nov 2003;18 Oct 2007 - 13 May 2008 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : yes Sat. Trans. : Yes Distribution : 2002-2018 Refernce Levl: Heights are referred to the station tide staff zero, which is linked to land-based benchmarks. This reference zero is unique to this station and is not an official datum (chart, national, etc.) and is not relative to local tidal parameters, such as mean lower low water. See the Originators for benchmark descriptions, maps, and the geodetic levelling history. Comment : This site places the discontinued site (257A), which was located about 3 miles away. At present, the reference level link from the old to the new has not been established; thus, the series are kept separate. The daily values agree well with AVISO altimeter. JASL Nov 2019 update replaces 2016- 05 Sep 2017. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 2002 58 none (11)185-(22)185 none (13)283-(10)284 (11)331-(07)332 (22)363-(09)364 (13)364-(01)365 2003 61 102-111,114-147,171- none none 241,305-334,342-345 2004 78 10-32,34-51,247-273, (09)003-(20)003 none 275-290 (09)097-(20)097 (09)121-(20)121 2005 94 25-43,46-48,224-229 (09)115-(08)116 none (21)167-(20)168 (23)237-(18)238 (00)365-(16)365 2006 100 none (03)018-(12)018 none (11)268-(00)269 (11)277-(00)278 (17)290-(00)291 2007 78 291-365 (16)028-(00)029 none (06)194-(15)194 (14)263-(00)264 (18)287-(14)288 (19)288-(17)289 (22)289-(13)290 (07)291-(15)291 2008 61 1-136,204-205,343- (00)229-(20)229 none 350 (07)285-(04)286 (17)313-(00)314 (17)333-(00)334 (08)342-(21)342 (05)362-(01)363 2009 99 32-34,80-81 (04)014-(13)014 none 2010 100 none (19)315-(03)316 none (13)332-(23)332 2011 100 none (11)181-(19)181 none 2012 100 none (15)259-(00)260 none 2013 100 none (13)174-(00)175 none (00)235-(08)235 2014 100 none none none 2015 100 none none none 2016 99 280-282,295-297, none none 342-344 2017 100 none none none 2018 100 none (21)233-(13)234 none