GLOSS Station Handbook

Station information sheet

GLOSS number139
Station name


CountryCook Islands
Time zone150W, GMT - 10hrs
Latitude (+ve N)-21.2
Longitude (+ve E)-159.76666
Observation period(s)Float gauge 1977-; Acoustic gauge 1993-
Responsible countryAustralia
Authority responsible
for tide gauge
National Tidal Centre, Australia (see GLOSS Contact Points).
GLOSS contactAustralia
Committed to GLOSSYes
Location mapView location map for GLOSS station Rarotonga
Digital dataYes
Additional parametersBarometric pressure, water and air temperature, wind speed and direction.
Data acquisition rate6 minute intervals
Fast delivery data at UHSLCDownload h023.dat from UHSLC   Format documentation for UHSLC data
High frequency data at BODCDownload from BODC   View Rarotonga site history   View BODC document #57345  
High frequency data at UHSLCDownload from UHSLC   Download documentation qa023a.dmt from UHSLC   Download from UHSLC   Download documentation qa023b.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)Barometric pressure, water and air temperature, wind speed and direction.
Tide gauge benchmarksCT/1: triangular stamp (steel pin) with '1' at centre of concrete emplacement; located across street from tide house in parking area of courtyard of govt house near flagpole. Fixed within island wide survey.
Auxiliary benchmarksUH-1: SS pin in concrete emplaced about 10ft W of tide staff at edge of quay, about 2ft from water on cement slab, which seems to be sinking. UH-2: 1 inch SS disc, no stamp, emplaced in concrete about 10ft E of tide staff on finger pier. Not locatable in Feb. 1992 - destroyed. UH-4: 1 inch square SS on top of pin set in white epoxy in cement, located near the closest corner of bldg to right, facing away from sea.
Data at PSMSL 
Annual MSL (RLR) dataDownload annual MSL (RLR) data for Rarotonga   Download annual MSL (RLR) data for Rarotonga
Annual MSL (RLR) plotView annual MSL (RLR) plot for Rarotonga   View annual MSL (RLR) plot for Rarotonga
MSL methodHourly means
PSMSL code1843
Other relevant codesNTF port no. 65980, UHSLC 023
Additional information 
Other relevant informationBackup gauges on site: 1) Leupold Stevens ADR (December 1984-) 2) Handar encoder ADR (December 1984-) Daily values calculated using 119-point convolution filter (Bloomfield, 1976) centred on noon applied to the hourly data with respective periods of the 95, 50 and 5% amplitude points at 124.0, 60.2 and 40.2 hours.
Last updated2002-10-16

Related BODC pages

Sea level portal      World Ocean Circulation Experiment (WOCE) — Sea  level
UK Tide Gauge Network     Climate Variability and Predictability (CLIVAR)
GLOSS project page  


Related external links

Global Sea Level Observing System (GLOSS)     Permanent Service for Mean Sea Level (PSMSL)
University of Hawai`i Sea Level Centre (UHSLC)  World Ocean Circulation Experiment (WOCE)


Permanent Service for Mean Sea Level (PSMSL) Global Sea Level Observing System (GLOSS) Station Handbook Intergovernmental Oceanographic Commission (IOC)