Results of Lithuanian national geodetic vertical first order network development

Abstract

Lithuanian National Geodetic Vertical First Order Network was established to create a new geodetic height system which fulfils up to date requirements. Digital levels NA3003, invar precise staffs, GPS receivers were used for network measurements. Gravimeters La Coste & Romberg were used for gravimetric data estimation. The requirement for measured height differences rms errors not exceeding 0,5 mm/km was fulfilled during vertical network establishment process. Data of vertical network are presented in the paper. Analysis of staffs’ calibration results is presented. Method of network observations is briefly described. Algorithm for normal height differences computation is given. Results of normal height differences adjustment and accuracy estimation are presented.