A comparison of gravimetric techniques for measuring subsurface void signals
A comparison of gravimetric techniques for measuring subsurface void signals
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DOI：
10.1088/0022-3727/34/3/331
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发表时间：
2001-02-07
影响因子：
3.4
通讯作者：
DiFrancesco, DJ
中科院分区：
文献类型：
--
作者：
Romaides, AJ;Battis, JC;DiFrancesco, DJ
为了证明重力梯度法在探测地下结构或空洞方面的潜力，在加利福尼亚州范登堡空军基地的地下导弹发射设施进行了一项实验。重力数据是使用拉科斯特-龙贝格G型重力仪收集的，重力梯度测量是使用洛克希德·马丁公司开发的武器控制验证重力梯度仪进行的。在进行了所有必要的修正后，将数据与发射设施的模型签名进行了比较。在最大的太空舱中线上分别测量了大约-75亩半高(1亩半高=10(-8)米S(-1))和30E(1E=10(-9)S(-2))的重力峰值和重力梯度异常。在观测到的重力和重力梯度数据中，掩埋的发射设施的存在是显而易见的。重力梯度在解析地下设施的特征并由此揭示其位置方面是明确的。相比之下，仅根据重力异常数据确定发射复合体将被证明是困难的，因为整个目标区域存在强烈的区域趋势。
To demonstrate the potential of gravity gradiometry in the detection of underground structures or voids, an experiment was carried out at an underground missile launch facility at Vandenberg Air Force Base, California. Gravity data were collected using a LaCoste-Romberg Model G gravimeter and gravity gradient measurements were made using a vertical spin-axis Lockheed Martin developed arms control verification gravity gradiometer. After performing all necessary corrections, the data were compared to modelled signatures of the launch facility. Peak gravity and gravity gradient anomalies of approximately -75 mu Gal (1 mu Gal = 10(-8) m s(-1)) and 30 E(1 E = 10(-9) s(-2)) respectively were measured over the centreline of the largest capsule. The presence of the buried launch facility was apparent in both the observed gravity and gravity gradient data. The gravity gradients were unambiguous in resolving the underground facility's signature and thus revealing its location. In contrast, identifying the launch complex solely from the gravity anomaly data would have proven difficult due to a strong regional trend across the target area.