GLOSS Station Handbook

GLOSS Station Handbook – Takoradi

The GLOSS Station Handbook is currently being re-designed and upgraded.

Until a new version is available, the tide gauge station list below from the last version of the Handbook provides links to further details about each tide gauge in the GLOSS Core Network. Click the GLOSS number buttons to view the information. Click column headings to sort the table.


Station information

Gloss number335
Station nameTakoradi
Time zoneGMT ( hours 00-23)
Latitude (+ve N)4.88333
Longitude (+ve E)-1.75
Observation periods4 January 2007 to 30 April 2010, Time span of data 1929- 2009 (psmsl)
Responsible countryGhana
Authority responsible for tide gaugeSurvey Department, P.O. Box 191, Cantonments, Accra, Ghana
Aditional parametersThe gauge at Takoradi GLOSS station is based on bottom- pressure measurements. Temperature output is provided and absolute pressure is sampled at 2Hz and averaged.
Data acquisition rateEvery 15 min.
High frequency data at UHSLCDocument 231a
Additional parameters (real-time)None
Tide gauge benchmarkTGBM GCS BM H4 Main Benchmark. Marker on tide gauge, close to radar mount
Benchmark relationshipsChart Datum= 3.086m below TGBM GCS BM H4
Chart Datum= 3.292m below HB TAK3
Chart Datum= 3.357m below SG1
Chart Datum= 3.415m below SG2
Chart Datum= 3.297m below SGN1
Chart Datum= 6.067m below TKTG
Chart Datum= 4.179m below SGN9
Chart Datum= 24.943m below SGN3
Chart Datum= 25.042m below SGW346
Chart Datum= 28.288m below GPS 4C
Chart Datum= 30.427m below SGWH1
Chart Datum= 30.642m below SGN4
Chart Datum= 34.451m below GPS1_Roof
Auxiliary benchmarksHB TAK3 Benchmark roughly 10m to the right of the tide gauge
SG1 Benchmark roughly 10m to the left of the tide gauge
SG2 Near the TKTG GNSS station
SGN1 Between tide gauge and harbour entrance, close to a large building

TKTG Takoradi Tide Gauge GNSS station - 30m from tide gauge
SGN9 At harbour entrance
SGN3 On entrance of roundabout from the harbour
SGW346 In centre of Roundabout
GPS4C Auxiliary marker of TKRD, close to church

SGWH1 Pillar in front of Survey Department of Ghana office
SGN4 On left side of stairs of Survey Department of Ghana Office
GPS1_Roof Marker in roof near TKRD
GPS2_roof Marker in edge of roof of TKRD
TKRD GNSS station on roof of Survey Department of Ghana Office
Data at PSMSL
Annual MSL (RLR) dataRLR 331
Annual MSL (RLR) plot
PSMSL code331
Additional information
Other relevant informationChart Datum= 34.427 m below GPS2_Roof
Chart Datum= 36.755m below TKRD

Data from the start of series until May 2009 refer to local Chart Datum. After this, the station was relocated. The station started operating again in January 2010, but to a different, yet to be established datum.
Last updated4 November 2010