Datums for 1619000, Johnston Atoll United States of America


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 1619000, Johnston Atoll, United States of America
Status: Superseded (Apr 17 2003) (Accepted Sep 16 1998)
Units: Feet
Control Station:
T.M.: 150
Epoch: 1960-1978
Datum: MLLW
DatumValueDescription
MHHW2.25Mean Higher-High Water
MHW2.01Mean High Water
MTL1.06Mean Tide Level
MSL1.07Mean Sea Level
DTL1.12Mean Diurnal Tide Level
MLW0.12Mean Low Water
MLLW0.00Mean Lower-Low Water
Ortho
STND-1.74Station Datum
GT2.25Great Diurnal Range
MN1.89Mean Range of Tide
DHQ0.24Mean Diurnal High Water Inequality
DLQ0.12Mean Diurnal Low Water Inequality
HWI3.55Greenwich High Water Interval (in hours)
LWI9.65Greenwich Low Water Interval (in hours)
Max Tide5.06Highest Observed Tide
Max Tide Date & Time01/13/1958 00:00Highest Observed Tide Date & Time
Min Tide-1.74Lowest Observed Tide
Min Tide Date & Time03/23/1951 00:00Lowest Observed Tide Date & Time
HAT3.12Highest Astronomical Tide
HAT Date & Time10/26/2007 15:30HAT Date and Time
LAT-0.72Lowest Astronomical Tide
LAT Date & Time03/02/2037 22:30LAT Date and Time
Tidal Datum Analysis Periods
01/01/1960 - 12/31/1978




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