摘要
2015年3月,由国防科技大学独立研发的SGA-WZ02重力仪在湖南长沙进行了一次车载重力测量试验,目的是为了检验、评估该重力仪应用于车载重力测量的可行性和精度水平。该重力仪系统主要由捷联惯性导航系统(SINS)、差分GNSS系统以及数据记录系统组成。试验路线为长沙市区东部的一条长约35 km的高速公路,测量过程中平均车速为40 km/h,本次试验共得到3条重复测线数据以进行内符合精度评估。为了评估重力异常外符合精度,使用CG-5高精度地面重力仪对该测线区域进行了测量,建立了外部重力参考数据库。本次车载试验结果表明,重复测线的内符合精度为1.64 m Gal/1.1 km,1.12 m Gal/1.7 km,外符合精度为2.33 m Gal/1.1 km,1.77 m Gal/1.7 km。
In March 2015,a ground vehicle gravimetry test was implemented in eastern Changsha to assess the repeatability and accuracy of ground vehicle SINS / GNSS gravimeter-SGA-WZ02. The gravity system developed by NUDT consisted of a Strapdown Inertial Navigation System（ SINS）,differential Global Navigation Satellite System（ GNSS） and a data logging subsystem. A south-north profile of 35 km along the highway in eastern Changsha was chosen and three repeated available measurement lines were obtained. The average speed of a vehicle is 40 km / h. To assess the external ground gravity disturbances,the authors built precise ground gravity data by CG-5 precise gravimeter as the reference. Gravity results in this test from repeated lines show that the internal accuracy is 1. 64 m Gal for half wavelengths 1. 1 km and is 1. 12 m Gal for 1. 7 km. The Root-Mean-Square（ RMS） of difference between calculated gravity data and reference data is about 2. 33 m Gal /1. 1 km,and 1. 77 m Gal /1. 7 km.
出处
《物探与化探》
CAS
CSCD
2015年第B12期67-71,共5页
Geophysical and Geochemical Exploration
基金
国家自然科学基金项目(61273055)
国家高技术研究发展计划("863"计划)项目(2013AA063902)
