STUDY ON PRECISION OF ELEVATION DIFFERENCE MEASUREMENT
BASED ON VRS TECHNIQUE
1)China University of Geosciences Great Wall College，Baoding 071000
2)College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083
3)College of Geoscience and Resource, China University of Geosciences, Beijing 100083
Abstract：A method utilizing elevation difference between the simultaneous observation values by two mobile stations very close to each other was proposed to improve the precision of elevation difference observation. Multipath effect can be solidificated as systematic error through taking fixed observation time according to diurnal characteristic of multipath effect.Both of formula derivation and tests verify that VRS technology can realize the precision of elevation difference measurement reaches millimetre level precision by the method.
