Controle de qualidade aplicado a dados gravimétricos

The act of measurement is, essentially, an act of comparing that involves errors derivatives of instruments, operator, processes of measurement, etc. The errors presents in the gravimetric data propagate on determination of the geoid model, so their identification is crucial. The objectives of this work consisted in integration of the gravimetric information collected by three Institutions and also in the detection and removal of possible blunders presents in this database. From observations that constitute the gravity database of Rio Grande do Sul, 2,480 came from IAG/USP, 950 from IBGE and 6,071 observations from IG/UFRGS. The Study was divided into three steps: check duplicate data (first step), which identified 225 observations; geographical distribution analysis of points (second step), where it was found 37 observations (0.60% of database) with planimetric positioning error; statistical analysis (third step) based on the standard deviation of the data. The altimetric and gravimetric tests have identified 284, 256 e 172 points suspects of present blunders, respectively, for the analysis (4.58% of database), Regional (4.13% of database) and Local (2.77% of database). In the three types of analyzes, in other words, Global, Regional and Local seven points were identified by two tests.