#TITLE_ALTERNATIVE#

• Main Author: AL HAKIM (NIM: 15113040 ), HUDA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27886
• Institution: Institut Teknologi Bandung

<p align ="justify">GPS surveys for rock displacement use a lot of dual frequence GPS, whereas The GPS has an expensive price. Low-cost GPS began to developed for precise positioning, but the use needs to be tested to what extend its performance and quality. This study tested the low-cost GPS for baseline <1km with the zero-baseline test procedure, short baseline test, low-cost and high-cost GPS comparison test, and a two day GPS test. The zero-baseline test for five low-cost GPS in this study proves that the five tools can be used but one would have large measurement noise. The short baseline test was performed for four varied points at distance of <1km with duration 2 to 3 hours and with baseline of ITB1 base point to the observation point among other; Point SABUGA, point of PSCA, point of SIPIL, and point of SR.. The short baseline test result at SABUGA and PSCA points match the expected quality, whereas for SIPIL and SR points it is suspected that there is an error in the set of GPS receivers, eiter from the Emlid GPS GPS or the antenna component. The low-cost and high-cost GPS comparison test was performed with baseline measurement from ITB1 base point to the SABUGA and PSCA points at same epox for each set of low-cost and high-cost GPS device. This comparison is done by calculating the residual solution coordinates between low-cost and high-cost GPS where the result difference is not significant. Based on the test method of performance and quality of low-cost GPS shows that low-cost GPS can be used for precise positioning with applicable conditions such as GPS used has been tested with zero-baseline, the method used for short baseline <1km, and using the same type of GPS chip set<p align ="justify">