Study on Terrain Correction Method in Near Area in Regional Gravity Survey
In gravity survey,the factors that affect the accuracy of gravity survey mainly include the ac-curacy of gravity value and geodetic data and terrain correction accuracy.With the continuous development of science and technology,the accuracy of gravity instruments and geodetic instruments continues to improve.Under the premise of excluding human error,the accuracy of gravity survey data depends more on the accu-racy of terrain correction Especially in mountainous and hilly areas with complex terrain conditions and large elevation difference,whether accurate terrain correction data can be obtained has become a decisive factor for the accuracy of gravity measurement values.This paper takes the field measured point data in mountainous areas as an example,takes terrain correction in the near area as the key research object,and uses three methods(eye estimation method auxiliary instrument method GNSS altiometry method)to determine the accura-cy respectively The time efficiency and economic cost are compared in detail,and the advantages and disad-vantages of each method are summarized,which provides a good application and demonstration effect for se-lecting a suitable near-area terrain correction method for regional gravity survey.
万方数据
维普
