UDC 528.92

COMPARATIVE ANALYSES OF QUASIGEOID MODELS
FOR THE REPUBLIC OF MOLDOVA TERRITORY

V. Chiriac
Technical University of Moldova

Кількість посилань 7

Comparative analyses of quasigeoid models
for the Republic of Moldova territory
V. Chiriac

Starting from 2011 a GNSS reference stations network reference system and MoldPos service was established by Land Relation and Cadastre Agency financed by Norwegian Government. In order to provide all necessary information not only for 2D positioning, but also for GNSS-based normal height computation the quasigeoid model was integrated in RTCM transformation messages to allow real time normal height determination for large scale mapping.
This paper presents the results of comparative study of existing quasigeoid models on territory of our country using control GNSS/Levelling measurements. Comparative study between GM2005, GM2010, GM2012 and EGM2008 quasigeoid models, currently used for large scale mapping, showed the best accuracy 4,8 cm of GM2005 with 4 parameters that could be used for large scale mapping for all territory of the country. The analyses of GM2005 residuals showed the best results in the middle and eastern part country territory and the worse on the western borders were is a lack of high quality data. The results of this study could be used by Land Relation and Cadastre Agency for argumentation of necessity to continue densification of National Gravity Network in order to achieve high accuracy quasigeoid model.

Порівняльний аналіз моделей квазігеоїда
для території Республіки Молдова
В. Киріяк

В даній статті представлені результати порів¬няння моделей квазігеоїда для території Респу¬бліки Молдова з використанням GNSS-вимірювань для нівелювання.

Сравнительный анализ моделей квазигеоида
для территории Республики Молдова
В. Кирияк

В данной статье представлены результаты срав¬нения моделей квазигеоида для территорий Респу¬блики Молдова с использованием GNSS-измерений для нивелирования.