GLOSS Station Handbook

GLOSS Station Handbook – Unalaska, Aleutian Is. AK

The GLOSS Station Handbook is currently being re-designed and upgraded.

Until a new version is available, the tide gauge station list below from the last version of the Handbook provides links to further details about each tide gauge in the GLOSS Core Network. Click the GLOSS number buttons to view the information. Click column headings to sort the table.


Station information

Gloss number102
Station nameUnalaska, Aleutian Is. AK
Time zone135W, GMT - 9hrs
Latitude (+ve N)53.88333
Longitude (+ve E)-166.53333
Observation periods1955-1977, 1982-, being upgraded 2007
Responsible countryU.S.A.
Authority responsible for tide gaugeNOAA, National Ocean Service, 1305 East-West Highway, Silver Spring, MD 20910-3281, USA
GLOSS contactUSA
Committed to GLOSSYes
Location map
Digital dataYes
Data acquisition rate6 minute interval
Fast delivery data at UHSLCData 041 File format
High frequency data at UHSLCData 041a Data 041b Document 041a Document 041b File format
Data held at national organisationYes
Real-time data availableYes
Real-time data transmitted to GLOSS Fast Centre
Additional parameters (real-time)None
Tide gauge benchmarkUS C&GS benchmark survey disk stamped 'NO 7 1956' set in a concrete footing of an old antenna near the Alaska Communication System Building.
Benchmark relationshipsTGBM = 8.78 feet above mean lower low water (1960-1978 epoch)
TGBM = 6.59 feet above mean sea level (1960-1978epoch)
TGBM = 5.05 feet above mean higher high water (1960-1978 epoch)
Auxiliary benchmarksNO 18 1973 2620 L 1982
NO 19 1973 2620 M 1982
NO 20 1974 TIDAL BM 21 1975
Site inspection 1993 states 2620 J 1979 'levels agree with history' 2620 K 1982
Data at PSMSL
Annual MSL (RLR) dataRLR 757
Annual MSL (RLR) plot
PSMSL code757
Other relevant codesUHSLC 041
Additional information
Last updated5 December 1993