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Differential corrections by NTRIP to mobile devices with android application

Abstract:

Real time GPS positioning is obtained by means of differential corrections sent from a base station to a mobile receiver. Usually, the correction is sent via radio or also by means of communication satellites. With the internet development and with the increase in the signal coverage thanks to a protocol, the GPS technology with NTRIP protocol are now used for studies in real-time. This technique is being developed and implemented in many regions, and it actually is the present and future of precision measurement work in real time. In this study, the implementation of the NTRIP technique for positioning in real time is described. The access to raw data from the GPS on a mobile Android and a Mobile Mapper 10, the use of NTRIP for sending differential corrections using the IP protocol, and the internet as an information network, were the mechanisms and tools used for creating a differential correction by position application. The first results show an improvement in the position determination which may achieve mean error of 2.3 m in the Tablet with Android, and 1.6m with the Mobile Mapper 10, in a time lapse of 5 minutes.