The Onsala Tide Gauge Station: Experiences from the first four years of operation
Paper in proceedings, 2019

A tide gauge station was installed at the Onsala Space Observatory in 2015. The official tide gauge station includes several independent senors: one radar and three pneumatic sensors (also referred to as bubblers). The radar and two bubblers are mounted in a well and one bubbler outside the well. Additional sensors such as one laser sensor and three radar sensors
have been used during di erent time periods in order to further assess the quality of the acquired sea level data.
Here we compare the four ocial sensors and the laser sensor which was installed in April 2016. The expected accuracy (one standard deviation) for all of these sensors is approximately 3 mm, according to the datasheet specifications. Results from the first four years of operations are used to assess and estimate the actual accuracies by means of comparisons between the sensors. We observe typical biases over time scales of months of up to 10 mm. Biases are caused by uncertainties of
the reference level of the sensor, the density of the water for the bubblers, multipath e ects for the radar, and nonlinearities with temperature for the laser. The observed monthly standard deviation between the sensors in the well vary between 2 mm and 6 mm, which is roughly consistent with the data sheet specifications.

Sea level

Tide gauge station

Author

Gunnar Elgered

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Space Geodesy and Geodynamics

Jonas Wahlbom

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Electronics Laboratory

Lars Wennerbäck

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Electronics Laboratory

Lars Pettersson

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Electronics Laboratory

Rüdiger Haas

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Space Geodesy and Geodynamics

Proceedings of the 24th European VLBI Group for Geodesy and Astrometry Working Meeting

75-79

24th European VLBI Group for Geodesy and Astrometry Working Meeting
Las Palmas de Gran Canaria, Spain,

Driving Forces

Sustainable development

Roots

Basic sciences

Infrastructure

Onsala Space Observatory

Subject Categories

Earth and Related Environmental Sciences

Oceanography, Hydrology, Water Resources

Climate Research

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.7419/162.08.2019

More information

Latest update

12/24/2019