Abstract

MAMANI GUTIERREZ, Huber Augusto. COMPARISON OF RESULTS OBTAINED THROUGH LEICA GEO OFFICE RELATED TO ONLINE POSITIONING SERVICES (DIFFERENTIAL) AND (PPP) FOROBSERVATIONS (GNSS). Rev. Tecnológica [online]. 2022, vol.18, n.24, pp. 1-9. ISSN 1729-7532.

ABSTRACT The purpose of the research has been to compare results obtained through commercial programs such as Leica Geo Office, in relation to online positioning services: (differential) and (PPP) Precise Point Positioning, to process GNSS data. As sample data, seven scattered points of the Mecapaca Autonomous Government Geodetic Network were considered, which were observed in sessions of; five hours; two hours and 30 minutes, subsequently processed and adjusted with reference to two active stations of the MARGEN-SIRGAS Geodetic Network of the Military Geographic Institute (IGM), as well as four Online Positioning Services; two AUSPOS differentials from the Australian Government and Trimble Center Point RTX service from Trimble, and two from Precise Point Positioning; APPS service dependent on NASA and Positioning by Precise Point (PPP) of the Brazilian Institute of Geography and Statistics (IBGE). Considering observation sessions of: five, two, and half an hour respectively; the results show acceptable differences in coordinates, first, in relation to those determined with the Leica Geo Office program, considered in the investigation as true values; and the others in relation to each type of positioning, obtaining variations less than (6.3) (6.5) and (51) cm (differential mode) and less than (13.9) (15.6) and 94 cm (precise punctual).

Keywords : Online positioning service; differential positioning; precise point positioning; coordinates.