QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 12 Aug 1999 Station : Port-of-Spain Latitude: 10 39.0N Country : Trinidad and Tobago Longitude: 061 31.0W JASL # : 248A Time Meridian: 060W (GMT - 4 hr) GLOSS # : 203 TOGA #: A012 NODC #: 71060101 Contributor : Institute of Marine Affairs P.O. Box 3160 Carenage Post Office Trinidad and Tobago and digitization by University of Hawaii Sea Level Center 1000 Pope Rd., MSB 316 Honolulu, HI 96822 USA Originator : Trinadad/Tobago Hydrographic Unit P.O. Box 1104 Port-of-Spain Trinidad and Tobago Original Data: analog Instrmnt Type: standard float and well Digitzd Intvl: hourly Present Data : Hourly, daily, and monthly values obtained by: Hourly : spot 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 1984 - 07 Dec 1992 Gaps > 1 mon : 01 Jun 1985 - 15 Aug 1985;18 Jul 1989 - 16 Nov 1989 01 Jun 1990 - 02 Oct 1990;02 Dec 1991 - 06 Jan 1992 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1984-1992 Refernce Levl: The sea level heights are referred to the zero point assigned to the tide staff. Bench mark information is available upon request from the originators. Comment : The daily and monthly means do not reveal any obvious reference level shifts. The timing appears to drift occasionally in the hourly data. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1984 97 1,98-102,219-223, (20)018-(10)019 45-47 317-321 (19)062-(14)063 (03)065-(13)065 (04)183-(17)183 1985 65 41-45,89-94,96-101, (04)031-(23)031 66-72,101-103 103-105,108-114,116- (19)040-(03)041 140,152-227,319-324, (07)041-(16)041 363-365 (09)052-(16)052 1986 91 1-15,24-28,49-51,91- (05)049-(18)049 144-150,172-180,203- 94,209-213,246-251 (19)268-(07)269 208,232-233,262-264 1987 100 none (22)161-(06)162 130-141,161-168,192- (00)234-(19)234 198,250-253,295-296, 313 1988 96 207-210,215-221,307- (20)104-(03)105 20,79-80,152-157, 325-329 (08)180-(17)180 181-188,213-215,299, (12)356-(20)356 311-312,329,353-358 1989 60 90-95,185-186,199- (04)191-(13)191 18,40-41,143-144, 320,328-331,333-341, (14)327-(21)327 168-169,175 343-345,349-352,353- 355 1990 47 21-23,30-43,63-68, (18)058-(11)059 72-73,85-86,145-149, 81-82,85-99,104-130, 311,323-324 133-142,152-275,314- 316,360-365 1991 84 1,33-36,103-107,143- none 59-60,91-92,136-139, 154,178-179,211-213, 164-169,193-195 240-246,263-266, 336-365 1992 81 1-6,67-80,112-118, (02)315-(12)315 none 129-132,252-253,266- (01)336-(14)336 279,322-325