论实施GPS基线三角高程测量的可能性

THE FEASIBILITY OF USING TRIGONOMETRIC LEVELING METHODS OF GPS BASELINE

ＧＰＳ已开始在中小城市控制测量中得到应用，如何将ＧＰＳ提供的大地高转化为中小城市控制测量所实用的正常高－直是个尚待研究解决的课题．本文通过分析高程系统的变化关系及将大地高转化为正常高所需依据，提出了“跳高”及“对向”ＧＰＳ基线三角高程测量的方法，并对其结果进行了分析和推断，论证了在中小城市测量控制网中实施ＧＰＳ基线三角高程测量的可能性．

In the GPS control surveys of small and medium-sized city, a new problem is how to transform ellipsoid height supplied by GPS into normal height. This paper introduces the transformable relation between the two different kinds of height and the foundation needed in doing so. 'Jumping' and'facing each other' trigonometric leveling methods of GPS baseline are put forward,and the outcome analysed and calculated shows the possibility of putting them into practice.