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GNSS System time offset between two satellite navigation systems is one of the most important aspects of their interoperability and compatibility. This paper introduces the research work of GNSS System Time Offset Monitoring at NTSC. The method of GNSS System Time Offset monitoring by Signal-in-Space Reception is described. Multi-GNSS receiver calibration is the key technology of GNSS system time...
Wireless sensor networks (WSNs) are very important for monitoring underground mine safety. Aimed at the characteristics of structure of the tunnel in underground mine, the tunnel wireless sensor network (TWSN) is presented to monitor the tunnel's environment. Sensor placement scheme in TWSN has considerable impact on the network lifetime. In this paper, based on analysis of the energy consumption...
Wireless sensor networks(WSNs) are very important for monitoring underground mine safety. Aimed at the characteristics of structure of the tunnel in underground mine, the tunnel wireless sensor network (TWSN) is presented to monitor the tunnel. TWSN has the unbalanced communication load which leads to early invalidation of nodes close to the base station. The nonuniform clustering algorithm for TWSN...
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