Abstract: Geophysical survey often encounters adverse environment jungle, canyons, narrow ditch and so on. This results in the number of visible satellites reducing and unstable satellite signal. Then it causes the accuracy of the positioning results decrease, working efficiency reduce and so on. Towards this problem,the use of multi-system compatible and highly sensitive BD930 board as the receiver main board is proposed, and the control method of the board is showed. In addition,a set of real-time kinematic positioning hand-book software is developed, and the differential data chain is built through network communication technology. Tests on the performance of the whole measurement system under actual geophysical survey work environment are completed. Results show that to some extent the system improved the ability of RTK to adapt to different environments, the differential data chain built up makes the measurement operation more convenient and efficient, and the needs of engineering application can be met.

Key words: geophysical survey, multi-system compatible, BD930 board, differential data chain, RTK