Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
Nearby GNSS Stations from SONEL: PDEL
Nearby Real Time Stations from VLIZ: pdas
Fast Delivery Data from UHSLC station 211: hourly and daily
Research Quality Data from UHSLC station 211: hourly and daily
PRIOR TO 1978 DATA SUPPLIED BY AUTHORITY CODE NO. 95
Documentation added 1998-11-04
data for 1990-91 replaced with revised values received from authority 41
Documentation added 2006-10-30
Following the supply of data 1978-2005 banked data revised and updated RLR value also calculated. FCODE in STTN table revised from HL to 24. However data 1924-1977 are Mean Tide Level(MTL) values.
Documentation added 2011-10-03
It has come to our notice that there was an error in the RLR diagram for Ponta Delgada. The diagram has been re-calculated, as a result the RLR factor changed from 5.887m to 5.871m. The data has been adjusted.
Documentation added 2016-01-22
A value of MTL-MSL=3 mm has been derived using the GESLA2 (high-frequency tide gauge) dataset using harmonic constituents. As the correction is only applied to RLR data and the data from 1924-1977 is metric, it is not used in the data set. Should this period become RLR in future it would be used.
Data Authority
Hydrographic Institute Rua das Trinas 49 1249-093 Lisboa