Ascension (Atlantic Ocean) Phase 1 Site History

History Summary

Station Name Ascension Phase 1
Latitude 7.917° S
Longitude 14.417° W
Country U.K.
Gloss No 263
Time Reference GMT(00-23 hours)
Contributor Proudman Oceanographic Laboratory,
Joseph Proudman Building,
6 Brownlow Street,
Liverpool,
L3 5DA. U.K.
Observation Periods April 1983 - March 1993
November 1993 - January 1995
Instrument Type Aanderaa tide gauge
Site of Gauge Clarence Bay, Ascension

Note

These data should not be confused with the Ascension Phase 2 data, recorded at English Bay. There are no links between these two data sets.

Parameters Recorded

Period CI(%) Parameters Sample Interval
04 1983 - 05 1985 99.4 ST,SSP 60 mins
05 1985 - 10 1985 100 ST,SSP 60 mins
10 1985 - 07 1986 100 ST,SSP 60 mins
07 1986 - 05 1987 100 ST,SSP 60 mins
05 1987 - 05 1988 99.8 ST,SSP 60 mins
05 1988 - 01 1989 100 ST,SSP 60 mins
01 1989 - 01 1990 100 ST,SSP 60 mins
01 1990 - 09 1991 99.8 ST,SSP 60 mins
10 1991 - 03 1993 100 ST,SSP 60 mins
11 1993 - 01 1995 100 ST,SSP 60 mins

where:

The parameter SSP listed above should NOT be interpreted as Sea Level. Firstly, SSP includes pressure loading from the height of water above the sensor and from the air pressure above that. Secondly, many of the sensors have long term drift.

Datum

Datum information is not available.

Please Note. Datum can drift WITHIN AND BETWEEN files.

Quality Assessment

All data have been tidally analysed and constants and residuals checked. Records have been visually inspected for spikes and timing shifts.

Period Parameters Comments
04 1983 - 05 1985 All Gap: (1984) 099-101,320-322
SSP Marked: (1995) 018
ST Gap: (1983) 112-117, (1984)255-(1985)141
05 1985 - 10 1985 All These data have uncertain timings, therefore must not be used by anyone, for tidal constant studies.
10 1985 - 07 1986 All None
07 1986 - 05 1987 All None
05 1987 - 05 1988 All Gap: (1988) 141-142
05 1988 - 01 1989 All Marked: (1988) 221
01 1989 - 01 1990 ST Marked: (1989) 077-102
01 1990 - 09 1991 All Gap: (1991) 250
10 1991 - 03 1993 All Marked: (1991) 288
11 1993 - 01 1995 All None