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本文介绍了中国科学院青藏高原研究所在阿尔金断裂西段进行GPS观测的剖面布设和首期观测情况.利用GAMIT/GLOBK软件对首期观测数据进行了处理,并将结果归算到区域参考框架下.GAMIT计算得到的“准观测值”均满足所须精度,其中单天解标准化均方差小于0.3,基线的平均相对精度为1.8×10~(-9) .GLOBK在区域参考框架下对GAMIT的单天解进行联合解算,结果显示:所有测点的点位精度水平分量为1～2 mm,高程分量为3～8 mm.因此阿尔金断裂西段的GPS观测达到了预期的设计要求.
This paper introduces the section layout and first observation of GPS observations in the western section of the Altyn Tagh fault by the Institute of Tibetan Plateau, Chinese Academy of Sciences. The first observation data is processed by GAMIT / GLOBK software and the results are reduced to the regional reference frame The accuracy of the “quasi-observations” calculated by GAMIT satisfies the required accuracy, and the mean square deviation of the standardization of single-day solutions is less than 0.3 and the average relative accuracy of the baseline is 1.8 × 10 ~ (-9) .GLOBK in the regional reference frame The joint solution to GAMIT’s single-day solution shows that the horizontal component of the point accuracy of all measuring points is 1 ~ 2 mm and the elevation component is 3 ~ 8 mm, so the GPS observation of the western segment of Altyn Tagh fault reaches the expected Design requirements.