GLOSS Station Handbook

Station information sheet

GLOSS number109
Station name

Johnston Is., Hawaiian Is.

Time zone165W, GMT - 11hrs
Latitude (+ve N)16.73333
Longitude (+ve E)-169.53333
Observation period(s)1950-
Responsible countryU.S.A.
Authority responsible
for tide gauge
NOAA, National Ocean Service, 1305 East-West Highway, Silver Spring, MD 20910-3281, USA
GLOSS contactUSA
Committed to GLOSSYes
Location mapView location map for GLOSS station Johnston Is., Hawaiian Is.
Digital dataYes
Additional parametersSurface temperature, density
Data acquisition rateDigital gauge: 6 minute interval (after 1975) Analog gauge: hourly heights (before 1975)
Fast delivery data at UHSLCDownload h052.dat from UHSLC   Format documentation for UHSLC data
High frequency data at BODCDownload from BODC   View Johnston Is., Hawaiian Is. site history   View BODC document #83902  
High frequency data at UHSLCDownload from UHSLC   Download documentation qa052a.dmt from UHSLC   Format documentation for UHSLC data
Real-time data availableYes
Real-time data transmitted
to GLOSS Fast Centre
Real-time data plots from UHSLC
Additional parameters (real-time)Surface temperature, density
Tide gauge benchmarksBenchmark 13(1955) is the primary benchmark (PBM) stamped 'NO 13 1955' set in a concrete bulkhead cap at the inshore end of the small boat pier
Benchmark relationshipsTGBM is 9.35ft above Tide Gauge Zero (Station Datum) NOAA Chart Datum (MLLW) is 1.74ft above Station Datum Mean Sea Level (1960-1978) is 2.81ft above Station Datum
Auxiliary benchmarks10 additional benchmarks are levelled to the TGBM and the Tide Station on a yearly basis (BM 21, BM 28, BM 22, BM 19, BM L, BM 6, BM 12, BM 14, BM MON JOHN, BM NO 1 JOE)
Data at PSMSL 
Annual MSL (RLR) dataDownload annual MSL (RLR) data for Johnston Is., Hawaiian Is.
Annual MSL (RLR) plotView annual MSL (RLR) plot for Johnston Is., Hawaiian Is.
PSMSL code598
Other relevant codesUHSLC 052
Additional information 
Other relevant informationNOAA can no longer travel to the gauge
Last updated1993-12-05