DGPS在航空重力测量中的应用  

The applications of DGPS to airborne gravimetry

作　　者：罗锋[1] 李冰[1] 姜作喜[1] 屈进红[1] 王志博[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083

出　　处：《物探与化探》2014年第6期1212-1217,1221,共7页Geophysical and Geochemical Exploration

基　　金：国家高技术研究发展计划(2002031312003)

摘　　要：基于DGPS在GT-1A型航空重力系统测量中的应用,针对GPS基站的位置精度和选择展开探讨,并对计算获得的空间重力异常结果进行对比分析。对比结果表明GPS基站所用位置值不同会引起测线空间重力异常的水平误差,相同测线经过水平调整后基本保持一致。GPS基站和移动站的距离长短对测线空间重力异常的局部细节幅值有影响,进行水平调整后相同测线间的内符合总精度为0.3 m Gal左右。Based on the application of DGPS in GT-1A airborne gravity measurement system, the authors discussed the selection and precision of GPS stations, and analyzed a variety of calculated free air anomaly results in detail. The final results indicate that the different values of GPS basic station position induces the horizontal error of free air anomaly on survey lines, and the results on the same survey line can almost reach the same precision after horizontal adjustments. In addition, the distances between GPS basic stations and rover stations have impacts on the locally detailed amplitudes of free air anomaly. After horizontal adjustments, the internal accord accuracy on the same survey line can reach almost 0.3.

关 键 词：航空重力 DGPS 基站 移动站 

分 类 号：P631[天文地球—地质矿产勘探]