Comparison of a Global Navigation Satellite Systems (GNSS) network captured in February 1990 with the re-survey in June 21

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Jake Martin

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Jake’s research project aims to demonstrate and critically analyse the development that has been made in the Global Navigation Satellite Systems (GNSS) surveying industry over the last three decades. To achieve this aim, Jake re-surveyed a portion of a large GNSS network that was originally surveyed in February 1990 using modern GNSS methods and technologies and compared and analysed survey methods and results. The results show the following conditions to deteriorate the quality of the GNSS solution even if a fixed solution is obtained; short observation duration, limited number of satellites, and single frequency satellite signals. The results also indicate that having a dual frequency capable receiver is the most important factor in acquiring a high quality GNSS solution.