Abstract
A majority of the exposed nunataks located in the Grove Mountains of the Antarctic interior haveyet to have had their elevations measured. The elevations of Mason Peak and Wilson Ridge were precisely determined by the Grove Team of the 26th CHINARE in 2010, with Mason Peak turning out to be the highest of theGrove Mountains. Considering that both Mason Peak and Wilson Ridge are difficult to climb because of theircragginess, we first selected three control points on the ice surface near Mason Peak and positioned them withGPS. Thus, accurate elevations of Mason Peak and Wilson Ridge could be calculated from three directions usingforward intersection and trigonometric leveling of a high-precision theodolite at the chosen control points. Theresults provide basic geodetic information that can be referred to as high-precision control points for surveyingand mapping in this part of Antarctica. This paper elaborates on the process of measurement and computation ofthe mountains summit elevations, and also analyzes the details of the principal elements influencing the accuracyof trigonometric leveling, the determination of refraction coefficients k, and observations of structure and distance.
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