A description of the sea level network in Finland can be found in 'Operational Oceanography: Implementation at the European and Regional scales. 2002 (pp.129-137)'. 1879-1903 VALUES BASED ON 1 READING PER DAY 1904-1970 VALUES BASED ON 6 READINGS PER DAY
Documentation added 2012-01-03
Levelling information recently supplied by the Finnish Meteorological Institute confirms Primary benchmark remains 7HB 4.48m above gauge datum of 1904 onwards. Previous datum for 1879-1903 was 1.967m above the present datum.
Documentation added 2017-01-31
Following the 2016 levelling exercise some adjustments have been made to the benchmark reference heights - at Helsinki this was +1mm for BM 7HB. The adjustments are a result of more accurate measuring and calculations using the N2000 height system. The RLR diagram has been re-drawn because of this.
Documentation added 2019-11-27
From 2018 onwards the averages of the Finnish sea level data will be based on 1 min observations. Values are calculated in Finnish normal time (EET). The data are relative to the reference surface of the Finnish sea level observations and thus the datum is the tide gauge zero.
Finnish Meteorological Institute Marine Research, Waves and Sea Level Erik Palenin aukio 1 P.O. Box 503 FI - 00101 Helsinki