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Current Datum Value: 2.70

Datums for 1619910, Sand Island, Midway Islands


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 1619910, Sand Island, Midway Islands
Status: Accepted (Apr 17 2003)
Units: Feet
Control Station:
T.M.: 0
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.26Mean Higher-High Water
MHW1.08Mean High Water
MTL0.65Mean Tide Level
MSL0.65Mean Sea Level
DTL0.63Mean Diurnal Tide Level
MLW0.22Mean Low Water
MLLW0.00Mean Lower-Low Water
Ortho
STND-2.70Station Datum
GT1.25Great Diurnal Range
MN0.86Mean Range of Tide
DHQ0.18Mean Diurnal High Water Inequality
DLQ0.21Mean Diurnal Low Water Inequality
HWI3.18Greenwich High Water Interval (in hours)
LWI9.48Greenwich Low Water Interval (in hours)
Max Tide4.10Highest Observed Tide
Max Tide Date & Time01/11/1958 00:00Highest Observed Tide Date & Time
Min Tide-1.50Lowest Observed Tide
Min Tide Date & Time02/01/1975 00:00Lowest Observed Tide Date & Time
HAT1.66Highest Astronomical Tide
HAT Date & Time12/31/1986 16:24HAT Date and Time
LAT-0.60Lowest Astronomical Tide
LAT Date & Time05/25/1990 21:36LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001




Products available at 1619910 Sand Island, Midway Islands,

Revised: 08/08/2018
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services