Methodical and algorithmic metrological aspects of the development and operation of hydrostatic CTD sea-level meters

By using the relationships between the measurement error of hydrostatic CTD sea-level meters, the errors of measuring channels of hydrostatic pressure, temperature, and conductivity, and the errors of determination of the gravitational acceleration, we estimate the admissible measurement errors for separate channels. Simplified relations for the evaluation of salinity and density of water corresponding to the class of accuracy of the level meter are presented. Possible differences between the readings of the level meters mounted at coastal level-measuring posts and the actual sea level in the coastal zone caused by the weak water exchange in the sea-well system are estimated. __________ Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 62–76, January–February, 2006.