Receptor de frequência simples de baixo custo com aquisição e processamento de dados brutos de constelações GPS

Abstract

This work presents a portable low-cost system that acquires messages from GPS constellations’ satellites and generates a raw data file from these messages. Considering that the receiver works in single frequency (L1), the data is acquired using an antenna that operates at 1,574.42 MHz, with a low noise amplifier fed by a 5 V power supply. The signal acquired by the antenna is directed to a RTL2832U v3 dongle that transmits the satellite messages to a computer on which this dongle is connected. This computer processes the messages from the dongle utilizing the GNSS-SDR open source software and provides RINEX files with the raw data. These files can be utilized as input on an application that provides the system position in the moment the data was acquired, such as RTKLib, making use of post-process techniques.