Takoradi (Ghana) Site History
History Summary
| Station name | Takoradi |
|---|---|
| Country | Ghana |
| Latitude | 04° 53.0' N |
| Longitude | 01° 45.0' W |
| WOCE No. | 9110 |
| Time Reference | GMT (0-23) |
| Contributor | 1983 - 1986 ORSTOM, France 2004 - 2005 National Institute of Oceanography, India |
| Originator | 2004 - Ghana Survey Department |
| Instrument Type | 1983 - 1986 A.Lege, float and stilling well 2004 - Pressure gauge |
| Observational Period | 1929 - 1992 2004 - 2005 |
Reference Level
The data are referenced to the zero of the tide staff at Takoradi harbour. The tide staff coincides with Chart Datum.
Quality Assessment
Comments
In the present Sea Level Gauge, a single-crystal silicon thin-diaphragm piezo-resistive strain gauge, manufactured by Honeywell, is used for estimation of water level through measurements of absolute pressure (i.e., water column pressure + atmospheric air pressure).
Conversion of absolute pressure (mbar) to water level with reference to CD consists of the following steps:
- Convert absolute pressure (mbar) to water pressure (mbar).
- Convert water pressure (mbar) to water pressure (dynes/cm2).
- Convert water pressure (dynes/cm2) to water level (cm) above the pressure inlet of the gauge and referencing the latter to CD.
The atmospheric pressure is obtained from either a nearby meteorological station (Takoradi aerodrome) or from measurements using an autonomous weather station [AWS].
The data for 2004 and 2005 are very noisy. Only very bad patches have been flagged.
| Period | Parameter | Missing data | Suspect data | Completeness index (%) | Sample interval |
|---|---|---|---|---|---|
| 2004 | ASLVTD01 | 001-183 | 249-253,264-267,278-279,291,303-304,323-323,329-331,361-365 | 50 | 15 minutes |
| 2005 | ASLVTD01 | 031-032,091,181-365 | 037-038,051-052,057,062-064,068-070,078-081,082-083,085-086,088-089,104-109,113,136-140,162-164,166-167 | 49 | 15 minutes |
