一种基于火箭橇轨道的动基座重力 测量系统评价方法

传统的重力仪精度评价方法为重力仪测量值与静态定点值或飞行状态下的重力线网格参考值进行比较,根据差值或相对异常值来评价重力仪的精度指标,但其缺点是飞行轨迹重复性差.火箭橇轨道是进行火箭橇测试的重要组成部分,它严格按照设计建设,长达数公里,拥有完整已知的地理数据信息,且沿着火箭橇轨道布有众多的绝对重力基准点.提出一种基于火箭橇轨道的重力测量系统评价方法,通过火箭橇轨道上的众多绝对重力基准点和重力仪测量得到的重力值比较,评价重力仪的精度指标性能.其优点是该方法能够连续、快速、可重复评价重力测量系统的精度指标,为重力仪研制提供精确的评价手段和鉴定方法.

The Research on Evaluation Method Based on the Rocket Sled Track of Moving Base Gravity Measurement System

Traditional evaluation methods of gravimeter accuracy include comparing the value of the gravimeter with the value of the static point or the gravity line grid reference, by measuring the difference of the gravity to evaluate the accuracy, but it has a disadvantage that the flight line can not be accurately repeatable. The rocket sled track is an important part for the rocket sled test. It is strictly constructed according to the design, as long as several kilometers, with the known geographic data and many absolute gravity datum points. The paper presents an evaluation method of the gravity measurement system based on rocket sled track, by comparing the values of the absolute gravity datum point and the gravity measurement by the gravity measurement system. The advantages of the method are fast, continuous and repeatable. It provides a method of evaluating and identifying the accuracy of the gravity measurement system.