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航空重力测量     
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  airborne gravimetry
     Designs and Applications of Digital Lowpass FIR-Filter in Airborne Gravimetry
     航空重力测量中FIR低通滤波器的设计与应用
短句来源
     DESIGN OF FIR LOWPASS DIFFERENTIATOR AND ITS APPLICATIONS IN AIRBORNE GRAVIMETRY
     FIR低通差分器的设计及其在航空重力测量中的应用
短句来源
     Theory, Methods and Applications of Airborne Gravimetry
     航空重力测量理论、方法及应用研究
短句来源
     Design and Application of the Digital Filter in Airborne Gravimetry
     航空重力测量中数字滤波器的设计与应用
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     Laser Altimetric Data for Airborne Gravimetry:Processing and Application
     航空重力测量中激光测高数据的处理与应用
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  airborne gravity measurement
     Study on the Theoretical Model of Dynamic Airborne Gravity Measurement
     关于动态航空重力测量中的理论模型的研究
短句来源
     Research on space covariance function's characteristic during downward continuation of airborne gravity measurement data
     航空重力测量数据向下延拓中空间协方差函数特性研究
短句来源
     Thus,in the dynamic airborne gravity measurement (airplane as an aircraft) the key problem is to separate the gravitation from inertia effectively.
     因此,在动态航空重力测量中(载体是飞机),为了提取出重力(或引力)信息,关键的问题是解决如何有效地将引力与惯性力分离开来。
短句来源
     By the analysis of airborne gravity measurement data,this paper constructs a space covariance function model with spatial characteristics.
     本文通过对航空重力测量数据的分析,建立起具有空间相关特性的空间协方差函数模型。
短句来源
     Using this model,the airborne gravity measurement test data is downward continued based on least squares collocation and is compared with known ground gravity data.
     利用所建立的模型,将航空重力测量试验数据采用最小二乘配置的方法向下延拓到地面,与地面已知重力数据进行比较。
短句来源
  airborne gravity
     Numerical results show that the systemic errors in the airborne gravity anomalies can be greatly reduced using any of the recalibrated coefficients. For example,the systemic error is reduced from 4.8 mGal to 1.8 mGal in Datong test.
     试验结果表明,采用新系数显著地降低了空中重力异常估值的系统误差,对于大同航空重力测量,系统误差从4.8 mGal减小至1.8 mGal。
短句来源
     First, various of the downward methods were discussed and compared, based on the analysis results we advanced the real method which suit for the CHAGS, and designed the software for downward continuation of the airborne gravity anomaly.
     为此,本文从空中重力异常向下延拓的各种方法入手,通过对各种方法理论上的研究、分析,在对CHAGS系统的实测数据计算结果的分析、比较的基础上,确定了CHAGS系统数据处理中空中重力异常向下延拓的实用方法,并编写了航空重力测量数据向下延拓的实用计算软件。
短句来源
     Thus,in the dynamic airborne gravity measurement (airplane as an aircraft) the key problem is to separate the gravitation from inertia effectively.
     因此,在动态航空重力测量中(载体是飞机),为了提取出重力(或引力)信息,关键的问题是解决如何有效地将引力与惯性力分离开来。
短句来源
     Study on the Theoretical Model of Dynamic Airborne Gravity Measurement
     关于动态航空重力测量中的理论模型的研究
短句来源
     A COMPARISON OF DIFFERENT DOWNWARD CONTINUATION METHODS FOR AIRBORNE GRAVITY DATA
     航空重力测量数据向下延拓方法比较
短句来源
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  “航空重力测量”译为未确定词的双语例句
     About ±3 mgal survey accuracy could be reached by analyzing all kinds of error sources of current system.
     从系统误差源综合分析得出 ,当前航空重力测量系统的测量精度约为± 3× 1 0 - 5ms- 2 ;
短句来源
     4. Based on an M-estimation principle, a robust estimator of parameters of systematic errors model is introduced in every surveying line.
     4、基于抗差估计理论,讨论了航空重力测量系统误差模型参数的抗差M估计方法与实现。
短句来源
     With the development of space technique, the geo-potential model, determined from satellite measurements and surface gravity observation, has been improved continuously, with higher resolution and precision.
     随着现代重力探测技术的不断发展,特别是航空重力测量技术的改进和完善以及新一代卫星重力测量计划的实现,人类获取的重力场信息也越来越丰富,全球和局部重力场模型的准确度和分辨率取得了重大突破。
短句来源
     The problems such as the aerborne gravimetry resolution and the relative area overlap can all be solved by means of this method. A great number of numerical tests prove that this method is reliable.
     该法可以解决航空重力测量分辨率受航高所限以及地面相关区重叠等问题,数值试验证明了此方法的有效性
短句来源
     Application status of wavelet theory in data compress of earthquake, filtering processing of disturbing acceleration in aerial gravity surveying, harmonic analysis of gravity solid tide was introduced in this paper, we concluded some common characters of application of wavelet theory to geodesy,analyzed its application features in geodesy, and discussed new application prospect of wavelet theory in geodesy. The purpose of this paper is to attract one s attention to new interdisciplinary study and forming systematic theory of wavelet analysis.
     介绍了小波理论在地震数据压缩、航空重力测量中扰动加速度的滤波处理、重力固体潮的调和分析等地学方面的应用现状,归纳了小波理论在地学应用领域的一些共性,分析了小波理论在地学领域的应用特点,探讨了小波理论在地学中新的应用方向,旨在为形成新的交叉研究方向或系统理论起一些抛砖引玉的作用。
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  airborne gravimetry
Calculation and spectra analysis of horizontal acceleration correction (HACC) for airborne gravimetry
      
In an airborne gravimetry test, the misaligned angle of platform and horizontal acceleration correction are calculated.
      
Application of a spherical FFT approach in airborne gravimetry
      
The method is applied to airborne gravimetry, motivated especially by the Greenland survey.
      
Linear gravity field state space models are still a useful tool to model the anomalous gravity field in vector gravimetry, airborne gravimetry, inertial geodesy and navigation.
      
更多          
  airborne gravity
The high-precision air navigation tools developed in recent decades enable airborne gravity measurements that are suitable for solving many problems of geophysical exploration.
      
On the basis of airborne gravity observations, it is possible to use gravity data for calculating PLDs in both plain and mountainous regions.
      
Experimental results show that the systemic errors in the airborne gravity anomalies can be greatly reduced by using any of the recalibrated coefficients.
      
For the second computation the marine data set was replaced by the sparser airborne gravity data resulting from the AGMASCO campaign of September 1996.
      
Flight test results from a strapdown airborne gravity system
      
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Oil gravity survey in China began in 1945, then rather flourished in 1950s.By the end of 1950s,the petroleum industry had 36 gravity survey crews; however, at the beginning of 1960s,the gravity survey crews began to decrease with years. By the mid 1970s, the crew number stopped dropping and staned increasing because gravity survey scored quite good geological effect in exploring buried hills and because gravity survey must be done urgently in many medium-sized and smallsized basins. The practice shows that gravity...

Oil gravity survey in China began in 1945, then rather flourished in 1950s.By the end of 1950s,the petroleum industry had 36 gravity survey crews; however, at the beginning of 1960s,the gravity survey crews began to decrease with years. By the mid 1970s, the crew number stopped dropping and staned increasing because gravity survey scored quite good geological effect in exploring buried hills and because gravity survey must be done urgently in many medium-sized and smallsized basins. The practice shows that gravity survey is a quite good exploration method for researching into areal geological structure be- cause of its merits: low cost, fast operation and nice effect. Furthermore, gravity survey also brings good result in researching into the local geological structure, particularly the buried hills. Looking forward to the future,we have the following works to do: · Areal exploration of new basins; · New comprehensive study of old basins using not only new and old gravimetric data but also other geophysical and drilling data; · Mountainous-district gravity survey in combination with seismic exploration, and the improvement of both its accuracy and its effect; · High-accuracy gravity survey which mainly focuses its attention on buried hill; · Scientific researches on borehole gravity survey.aerogravity survey and the new data processing technique.

我国于1945年开始进行石油重力勘探,五十年代有过较大的发展,五十年代末石油系统已有36个重力队,从六十年代初开始,重力队数逐渐减少,直至七十年代中期以后,由于重力勘探古潜山取得了较好的地质效果,并且有许多中小盆地急需进行重力勘探,重力队数才得到稳定和发展。事实证明:重力勘探是研究区域地质结构较好的物探方法,具有投资少、速度快、效果好的特点,在研究局部地质结构,尤其是勘探古潜山方面也有良好的效果。展望将来,有以下几方面的工作要做: 1.开展新盆地的区域勘探; 2.利用新、老重力资料,结合其它物探及钻井资料重新综合研究老盆地; 3.配合地震勘探开展山区重力勘探,并提高其精度和效果; 4.开展以勘探古潜山为主要对象的高精度重力测量; 5.探索井下重力测量、航空重力测量以及新的资料处理技术。

A high quality filter is necessary to smooth the airborne gravity data. For this purpose a Finite Impulse Response filter(FIR) is chosen. The FIR filter has the distinct advantages that it has linear phase characteristics and is always stable for numerical computations. In this paper a lowpass filter related to airborne gravity is designed by use of chebysher Approximation method. Finally. an acceleration model is given to test the reliability of this filter. The results indicated that the lowpass flter is suit...

A high quality filter is necessary to smooth the airborne gravity data. For this purpose a Finite Impulse Response filter(FIR) is chosen. The FIR filter has the distinct advantages that it has linear phase characteristics and is always stable for numerical computations. In this paper a lowpass filter related to airborne gravity is designed by use of chebysher Approximation method. Finally. an acceleration model is given to test the reliability of this filter. The results indicated that the lowpass flter is suit for processing of airborne gravity data.

航空重力测量数据含有许多噪声,需用高质量的数字滤波器加以平滑。有限冲激响应(FIR)滤波器的优点是具有精确线性相位而且总是稳定的。本文利用契比雪夫逼近方法,设计了适用于航空重力测量的FIR低通滤波器。为检测其性能,文中建立了一个模拟加速度模型。检测结果表明:滤波器性能可靠,适用于航空重力测量数据处理。

This paper presents a method for determining the terrain surface gravity anomalies using airborne gravimetry and the digital elevation model(DEM). This method is based on that one point aero gravity anomaly can represent the mean gravity anomaly in the terrain surface relative area, and the surface gravity anomalies are related to the terrain elevations. The problems such as the aerborne gravimetry resolution and the relative area overlap can all be solved by means of this method. A great number of numerical...

This paper presents a method for determining the terrain surface gravity anomalies using airborne gravimetry and the digital elevation model(DEM). This method is based on that one point aero gravity anomaly can represent the mean gravity anomaly in the terrain surface relative area, and the surface gravity anomalies are related to the terrain elevations. The problems such as the aerborne gravimetry resolution and the relative area overlap can all be solved by means of this method. A great number of numerical tests prove that this method is reliable.

本文基于空中一点重力异常可以代表地面一定相关区的平均重力异常的频谱特性,以及在局部区域空间异常与地形高的相关性,提出综合利用航空重力测量和数字高程模型(DEM)确定地面重力异常的方法。该法可以解决航空重力测量分辨率受航高所限以及地面相关区重叠等问题,数值试验证明了此方法的有效性

 
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