Macao geodetic infrastructure : permanent GPS reference stations
Iu, Ka Man
The first Macao GPS control network was surveyed in 1991 that consists of six Doppler stations. It was a jointly project conducted by the British forces, the Hong Kong Government and the Macao Government. In 1994, Macao regional GPS network with 14 control stations was established and provides transformation parameters to link Macao local grid datum to WGS84 datum. The rapid development of Macao urban constructions and the changes in environment conditions have increased the difficulties to conduct a traditional triangulation survey in Macao. In this case, Cartography and Cadastre Bureau (DSCC) of Macao SAR Government are putting more efforts on the use and development of GPS technology. In 2002 and 2005, two permanent GPS reference stations were built respectively to support GPS static survey and Real Time Kinematics (RTK) survey. This paper will give an overview on the evolution of Macao GPS Network; describe the infrastructure of the reference system, the state of applications, and share the result of some investigations regarding the use of different transmission methods and the reception of GPS signals in Macao. Macao is a small city of just 28.2 km2, and it could probably serve RTK users very well with two reference stations, however the atmospheric condition will affect coordinate quality and the extent of use of RTK. This paper will indicate the necessity to construct a third GPS reference station in Macao to form a Network RTK, thereby giving directions on the future development of GPS technology in Macao to tread behind the significant modernization of GNSS.
Event: XXX FIG Working Week and General Assembly : Strategic Integration of Surveying Services
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