Cascais (Portugal) Site History

History Summary

Station Name Cascais
Latitude 38° 41.0' N
Longitude 009° 25.0' W
Country Portugal
GLOSS No. 246
Time Reference GMT (00-23 hours)
Contributor Inst. Portugues de Cartografia e Cadastro,
Rua De Artilharia Um, No. 107
P - 1070 Lisboa
Portugal
Observational Periods 1986-1995, 2000
Instrument Type Float and well, BOREL

Tide Gauge Benchmark Description

m3 - benchmark bolt at the root of the groin where tide gauge is located.
NP1 - benchmark bolt at the entrance of the Cidadela de Cascais.

Auxiliary benchmarks

Benchmark Elevation
m1 6.237m above Chart Datum
m2 6.233m above Chart Datum
m4 11.454m above Chart Datum
m5 6.597m above Chart Datum

Datum Information

Tide gauge zero (TGZ) = Portuguese Hydrographic

TGZ = 7.277m below m3
TGZ = 15.437m below NP1

Parameters

Period Parameters CI% Sample interval
1986 ASLVZZ01 99 60 minutes
1987 ASLVZZ01 86 60 minutes
1988 ASLVZZ01 98 60 minutes
1989 ASLVZZ01 97 60 minutes
1990 ASLVZZ01 84 60 minutes
1991 ASLVZZ01 99 60 minutes
1992 ASLVZZ01 99 60 minutes
1993 ASLVZZ01 99 60 minutes
1994 ASLVZZ01 93 60 minutes
1995 ASLVZZ01 21 60 minutes
2000 ASLVZZ01 42 60 minutes

Where:

ASLVZZ01 = Sea Level (metres)

Quality Assessment

Comments

All data have been compared with the current Harmonic Constants Library, and residuals checked. Records have been visually inspected for spikes, datum shifts and timing errors.

The data series contain many one hour gaps, usually once every seven days, but sometimes as often as one gap a day. Only gaps of over one hour are listed below.

Period Parameter Missing data Suspect data
1986 ASLVZZ01 066,090,252,258,321,356 252-258
1987 ASLVZZ01 012,047-054,059-069,174-205,306-307,353-355 347-351
1988 ASLVZZ01 015-022,036 None
1989 ASLVZZ01 025-027,131-132,216,300,328,343-345, 349,353,359-360,365 None
1990 ASLVZZ01 001-004,033-034,043,081-134,141,148, 155-156,169-170,183,204,211,225,232, 253,274,281,295,302,316,323,351,365 Possible datum shifts in July and August
1991 ASLVZZ01 021,056,063,077,084,098,154,189,210, 224,231,364 None
1992 ASLVZZ01 048,146,147,148,149,150,151,152 None
1993 ASLVZZ01 074 319
1994 ASLVZZ01 003,038,061,087,222-243,251,262,353 046-049,053-056
Timing error, 1hr out 087-365
Datum shift 243 -251
1995 ASLVZZ01 016-017,079-365 Timing error, 1hr out 001-065
2000 ASLVZZ01 001-010,032,040,052-053,064,115,122, 155-157,157-365 None