永久性潮汐与大地测量基准

社会、经济和科技的发展,对大地测量基准的精度、历元、框架等方面的要求愈来愈高,因此必须顾及具有同等精度量级的地球动力现象如潮汐、极移、地壳运动、冰后期反弹等对大地测量基准的影响。本文仅讨论永久性潮汐对重力基准、高程基准、大地水准面、垂线偏差等方面的影响。对大地测量基准中使用的无潮汐、平均湖汐和零潮汐等概念和相关计算进行了推导和讨论。

Permanent Tides and Geodetic Datum

With the development of society economy, science and technology, the requirements for accuracy, epoch and frame of geodetic datum are higher and higher. Hence the effects on the geodetic datum from the tides, polar motion, crustal movement and post rebound should be taken into account. In the paper only the influences of permanent tides on the gravity datum, height datum, geoid and deflections of the vertical are discussed. Besides, the concept and relevant computation formulae for the effects from the non tide, mean tide and zero tide are derived.