Link to RLR information.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2002Sep24 : 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 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 : Helsinki 060/351 RLR(1964) is 9.6m below BM7HB =========================== BENCHMARK INFORMATION UPDATE ADDED 12-JUL-93 : Helsinki 060/351 RLR(1964) is 9.6m below BM7HB =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 03-Jan-2012 : 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. =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 31-Jan-2017 : 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.
Finnish Meteorological Institute Marine Research, Waves and Sea Level Erik Palenin aukio 1 P.O. Box 503 FI - 00101 Helsinki FINLAND