QUALITY ASSESSMENT OF SEA LEVEL DATA by the UH SEA LEVEL CENTER/NATIONAL OCEANOGRAPHIC DATA CENTER JOINT ARCHIVE FOR SEA LEVEL updated: 11 Apr 2019 Station : Saipan-B Latitude: 15 13.6N Country : N. Mariana Islands Longitude: 145 44.5E JASL # : 028B Time Meridian: 150E (GMT + 10 hr) GLOSS # : 118 TOGA #: P015 NODC #: 11145501 Contributor : UH Sea Level Center 1000 Pope Rd. MSB 317 Honolulu, Hawaii 96822 Originator : Dept. of Oceanography University of Hawaii 1000 Pope Rd. MSB 317 Honolulu, Hawaii 96822 Original Data: digital Instrmnt Type: 1. 1978-1/2007: Fischer and Porter Analog-to-Digital Recorder (ADR) 2. 2/2007- radar (RAD) gauge (Vega Vegapuls 62) 3. 2/2007- pressure transducer (PRS) 4. 8/2011 8/2015 - Radar, Sutron RLR (RA2) 5. 11/2015 - Bubbler (BUB) Primary channel used in JASL set: 1978-1/2007: ADR 2/2007-8/2015: RAD 11/2015-2018: BUB *short gaps in primary channel filled with other channels as available; see UHSLC for specific dates Digitzd Intvl: 15 minutes (ADR); 3 min (RAD); 2 min (PRS); 10 min (RA2); 6 min (BUB) Present Data : Hourly, daily, and monthly values obtained by: Hourly : (pre-1987) Nine-point triangular filter centered on the hour with respective periods of the 95, 50, and 5% amplitude point of the filter response at 623.6, 177.0, and 103.7 minutes;(1987+) three-point 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 : 19 Sep 1978 - 31 Dec 2018 Gaps > 1 mon : 21 Nov 1980 - 29 Apr 1981; 22 Jun - 5 Aug 1985; 2 Oct - 2 Dec 1986; 27 May - 14 Jul 1992 02 Mar 1993 - 15 Jun 1993;22 Apr 2004 - 08 Jun 2004 16 Jun 2004 - 03 Sep 2004;14 Mar 2005 - 16 Feb 2007 25 May 2011 - 04 Aug 2011;02 Aug 2015 - 19 Nov 2015 Time Refernce: GMT (hours 00-23) Space-filler Flag :-9999 Units : millimeters Missing Data Flag : 9999 Existing : Yes Operational : Yes Sat. Trans. : No Distribution : 1978-2018 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. Series 028B is separate from 028A since they are not linked to the same datum. Comment : The daily and monthly means reveal no apparent changes in the reference level. The questionable fluctuations in 1981 and 1986 are due to meteoro- logical events. Typhoon Kim (winds to 135 knots) passed near Saipan on 3 Dec 1986. Super typhoon Yutu hit Saipan 24 Oct 2018. The JASL update of 11 Apr 2019 replaces 01 Jan 2016 - 05 Sep 2017. CI MISSING REPLACED GAPS QUESTIONABLE YEAR (%) DATA OR BAD DATA FLUCTUATIONS ---- --- -------------------- --------------- -------------------- 1978 28 none none none 1979 100 none none none 1980 89 327-366 none none 1981 67 1-118 none 318-319 1982 100 none none none 1983 100 none none none 1984 100 none none none 1985 88 173-217 none none 1986 80 182-187,213-219 none 337-338 275-336 1987 100 none none 321-338 1988 94 2-7,184-200 none 297 1989 92 8-12,65-67, none none 170-177,258-261, 289-299,354-258 1990 94 8-17,39-51, none 197-202 246-249 1991 97 39-49,218-219, none none 358-365 1992 83 1-14,148-196,301-303 none none 1993 68 20-26,61-166,362-365 none none 1994 98 1-4,32-33,182-183, none 298,308 348-350 1995 100 none (02)140-(01)141 none 1996 98 328-335 (04)337-(22)337 none (15)341-(10)342 (04)345-(02)346 1997 100 none none 291 1998 100 none none none 1999 96 88-98,161-168 none none 2000 97 123-130,241-246 none none 2001 94 333-354 none none 2002 99 348-351 none none 2003 98 351-356 none none 2004 64 113-160,168-247, none none 304-310 2005 19 18-21,73-365 none none 2006 0 1-365 none none 2007 87 73-47,308-309 (23)286-(13)287 none (23)303-(14)304 (23)316-(12)317 2008 100 none none none 2009 100 none (07)123-(23)123 none 2010 100 none (14)062-(21)062 none (12)064-(21)064 (12)065-(21)065 (13)066-(21)066 (12)067-(22)067 (12)068-(21)068 (12)069-(21)069 (11)070-(21)070 (10)071-(22)071 (10)072-(21)072 (09)073-(22)073 (09)074-(22)074 (09)075-(22)075 (09)076-(22)076 (09)077-(21)077 (09)078-(21)078 (09)079-(21)079 (09)080-(21)080 (08)081-(22)081 (08)082-(21)082 (08)083-(22)083 (08)084-(22)084 (08)085-(21)085 (08)086-(22)086 (08)087-(21)087 (08)088-(21)088 (08)089-(22)089 (07)090-(22)090 (07)091-(23)091 (07)092-(21)092 (07)093-(22)093 (07)094-(22)094 (08)095-(22)095 2011 75 90-92,119-122,124- (12)052-(22)052 none 131,134-216 (12)053-(22)053 (13)054-(23)054 (16)055-(23)055 (11)056-(22)056 (14)057-(23)057 (14)058-(23)058 (13)059-(22)059 (15)060-(22)060 (10)062-(22)062 (11)063-(22)063 (15)064-(23)064 (12)066-(22)066 (13)067-(22)067 (12)068-(22)068 (11)069-(22)069 (12)070-(22)070 (10)071-(22)071 (12)072-(22)072 (10)073-(23)073 (10)074-(22)074 (10)075-(00)076 (09)076-(01)077 (10)077-(05)078 (09)078-(23)078 (08)079-(23)079 (09)080-(23)080 (09)081-(23)081 (09)082-(23)082 (10)083-(22)083 (09)084-(23)084 (10)085-(22)085 (09)086-(00)087 (09)087-(23)087 (10)088-(22)088 (10)089-(23)089 (10)093-(23)093 (10)094-(22)094 (10)095-(00)096 (06)096-(04)097 (08)097-(00)098 (04)098-(03)099 (09)099-(23)099 (08)100-(03)101 (09)101-(02)102 (09)102-(00)103 (05)103-(04)104 (08)104-(00)105 (08)105-(00)106 (08)106-(00)107 (09)107-(23)107 (09)108-(00)109 (09)109-(23)109 (09)110-(01)111 (07)111-(01)112 (07)112-(23)112 (09)113-(00)114 (09)114-(23)114 (09)115-(04)116 (07)116-(02)117 (08)117-(03)118 (08)118-(03)119 (08)122-(03)123 (08)123-(05)124 (08)131-(03)132 (07)132-(01)133 (08)133-(04)134 (07)141-(05)142 2012 100 none none none 2013 100 none (13)174-(00)175 none 2014 92 135-136,225-255 (09)312-(21)312 none 2015 67 37-43,190-191,204- (08)022-(16)022 none 210,214-323 (12)023-(22)023 (15)024-(22)024 (10)154-(20)154 (11)155-(21)155 (14)160-(21)160 (14)161-(21)161 (14)162-(21)162 (15)163-(22)163 (14)173-(21)173 (14)174-(21)174 (15)175-(22)175 (14)176-(21)176 (14)178-(21)178 (13)180-(21)180 (13)181-(22)181 (13)182-(22)182 (14)183-(21)183 (13)185-(23)185 (09)186-(22)186 (11)187-(21)187 (13)188-(22)188 (08)189-(21)189 (05)191-(01)192 (05)192-(23)192 (06)193-(23)193 (08)194-(22)194 (13)195-(22)195 (13)196-(22)196 (11)197-(22)197 (12)198-(02)199 (08)199-(22)199 (10)200-(22)200 (14)201-(22)201 (12)202-(21)202 (00)203-(07)203 (05)323-(22)323 2016 100 none none none 2017 100 none none none 2018 100 none none none