针对国家一、二等水准测量规范（2006）对利用 GNSS 水准技术实现跨河高程传递的要求展开研究，本文采用规范方法和基于移去恢复技术的高差拟合法对利用 GNSS 水准实现二等跨河高程传递进行有关实验，实验结果表明：在海拔较低（小于500 m），且高程异常变化平缓的测区，按照规范较容易达到二等水准测量精度要求，而对于海拔较高，且高程异常变化较大测区，虽然规范不建议进行 GNSS 跨河水准测量，但采取基于移去恢复技术的高差拟合法同样可以达到二等水准测量要求。%The requirements of river-crossing leveling based on GNSS leveling are investigated according to specifications for the first and second order leveling(2006 ),the experiments of second order river-crossing leveling are carried out using standard method and level difference fitting method based on remove-restore technology,the results show that the second order leveling can be achieved according to the specifications at the lower altitude (less than 500m)and smooth height anomaly area, and for high altitude and height anomaly changes larger area,although the GNSS river-crossing leveling is not recommended in specifications,but if level difference fitting method based on remove-restore technology can be adopted,the second order level-ing can also be achieved.
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