国产零长弹簧原理动态重力仪首次飞行试验及精度评估  

First flight test and accuracy evaluation of domestic dynamic gravimeter through the principle of zero length spring

作　　者：翟振和[1,2] 范昊鹏 管斌 马健[1,2] 段渭超 ZHAI Zhenhe;FAN Haopeng;GUAN Bin;MA Jian;DUAN Weichao(Xi’an Institute of Surveying and Mapping,Xi’an 710054,China;State Key Laboratory of Geo-information Engineering,Xi’an 710054,China;Information Engineering University,Zhengzhou 450052,China)

机构地区：[1]西安测绘研究所,陕西西安710054 [2]地理信息工程国家重点实验室,陕西西安710054 [3]战略支援部队信息工程大学,河南郑州450052

出　　处：《测绘通报》2021年第2期68-71,共4页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(41674082)。

摘　　要：CHZ-Ⅱ重力仪是首套完全国产零长弹簧原理航空重力仪,2018年4月在陕西渭南地区进行了首次飞行试验,共完成4个架次24条测线的有效飞行,标志着我国航空重力仪在自主研发的道路上又取得了长足的进步。利用飞行地区地面重力数据对CHZ-Ⅱ重力仪的测线扰动重力和格网扰动重力数据进行精度评估,其中空中测线在10 km分辨率条件下,精度达到1 mGal。采用地形辅助法对测量形成的5'测格网重力数据进行向下延拓,经延拓至地面后精度优于5 mGal,基本满足平原地区的测量需求。CHZ-Ⅱgravimeter is the first completely domestic airborne gravimeter through the principle of zero length spring.In April 2018,the first flight test was carried out in Weinan area of Shaanxi Province,a total of 4 sorties and 24 flight surveying lines have been completed,which markes that China’s airborne gravimeter has made great progress on the road of independent research and development.Using the ground gravity data of the flying area,the accuracy of CHZ-Ⅱgravimeter’s line disturbing gravity and grid disturbing gravity data is evaluated.Under the condition of 10 km resolution,the accuracy of the surveying line disturbing gravity data is up to or better than 1 mGal by using the point-mass method.The downward continuation of 5'air grid gravity data is made by using the terrain assist method,the accuracy of the 5'grid gravity data after the downward continuation is better than 5 mGal in comparison with land gravity data,which basically meets the measurement requirement of the plain area.

关 键 词：CHZ-Ⅱ动态重力仪 零长弹簧 扰动重力 向下延拓 阶方差模型 

分 类 号：P223[天文地球—大地测量学与测量工程]