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Datums for 9457512, Sitkalidak Island GPS Tide Buoy AK


Data Quality Data from this station was collected using methodology that does not meet CO-OPS highest level of accuracy (no more than 10 cm, 95% Confidence Interval (CI) referenced to a tidal datum). Recognizing that lower quality data can be used for certain applications CO-OPS is making this data available to its users with restraint. The average six-minute water level observations derived from this system have an accuracy ranging from 10.0 - 30.0 cm, 95% CI on datum. Users are cautioned to consider the accuracy of these data before using them for critical navigational or coastal engineering purposes.

Elevations on Station Datum

Station: 9457512, Sitkalidak Island GPS Tide Buoy, AK
Status: Accepted (Oct 27 2016)
Units: Feet
T.M.: 135
Epoch: 2007-2011
Datum: STND
DatumValueDescription
MHHW50.85Mean Higher-High Water
MHW50.24Mean High Water
MTL47.02Mean Tide Level
MSL47.00Mean Sea Level
DTL46.76Mean Diurnal Tide Level
MLW43.80Mean Low Water
MLLW42.67Mean Lower-Low Water
NAVD88
STND0.00Station Datum
GT8.18Great Diurnal Range
MN6.44Mean Range of Tide
DHQ0.61Mean Diurnal High Water Inequality
DLQ1.13Mean Diurnal Low Water Inequality
HWI10.38Greenwich High Water Interval (in hours)
LWI4.07Greenwich Low Water Interval (in hours)
MaximumHighest Observed Water Level
Max Date & Time Highest Observed Water Level Date and Time
MinimumLowest Observed Water Level
Min Date & Time Lowest Observed Water Level Date and Time
HATHighest Astronomical Tide
HAT Date & Time HAT Date and Time
LATLowest Astronomical Tide
LAT Date & Time LAT Date and Time
Tidal Datum Analysis Periods
06/26/2016 - 07/25/2016




Products available at 9457512 Sitkalidak Island GPS Tide Buoy, AK

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services