[5] [5] VYSKOCIL P, SEBESTA J.Relative timing characteristics of GPS timing modules for time synchronization application［C］//IEEE International Workshop on Satellite and Space Communications, 2009:230-234.

[6] [6] MOSAVI M R, AMIRMOINI H.Single-frequency GPS receivers ionospheric time-delay approximation using radial basis function neural network systems［C］//IEEE International Conference on Systems, Man and Cybernetics, Tokyo, 2009:4592-4595.

[8] [8] POPOV V, WELCH B L.PCI data acquisition card for application in radiation imaging systems［C］//Nuclear Science Symposium IEEE, 2003, 4: 2339-2342.