High-accuracy relative event locations using a combined multiplet analysis and the double-difference inversion.

2012 ◽  
Author(s):  
Fernando Castellanos ◽  
Mirko van der Baan
Keyword(s):  
High Accuracy ◽  
Double Difference ◽  
Multiplet Analysis

scholarly journals Earthquake Relocation in Northern Bali Island in 2015-2017 using Double Difference Method (DD)

2018 ◽  
Vol 19 (2) ◽  
pp. 64
Author(s):  
Nandaru Diaz ◽  
Komang Ngurah Suarbawa ◽  
Adityo Mursitantyo
Keyword(s):  
Fault Zone ◽  
Difference Method ◽  
Accurate Result ◽  
Seismic Analysis ◽  
High Accuracy ◽  
Double Difference ◽  
Earthquake Relocation ◽  
Time Value ◽  
Earthquake Distribution ◽  
Real Value

A research about earthquake relocation in Northern Bali Island in 2015 – 2017 using the Double Difference (DD) method has been carried out. Earthquake relocation is important to get some informations about earthquake locations with high accuracy, fault zone identification, earthquake distribution and seismic analysis. The results of the relocation indicated that there was a displacement of the location of earthquake that formed moving closer to the earthquake source namely a fault. Relocation using HypoDD program gave high accurate result indicated by the RMS residual time value close to zero e.g. 0,000 - 0.01 which mean the results of calculations and observations are closed to the real value.

The Research on Ambiguity Processing of GPS Deformation Monitor

2012 ◽  
Vol 204-208 ◽  
pp. 2787-2791
Author(s):  
Jian Yang ◽  
Hao Wu
Keyword(s):  
Real Time ◽  
Calculation Method ◽  
Carrier Phase ◽  
Direct Calculation ◽  
High Accuracy ◽  
Processing Method ◽  
Double Difference ◽  
Relative Positioning ◽  
Time Dynamic ◽  
Continuous Monitor

In high accuracy GPS deformation monitor application,we usually use GPS relative positioning, establishing the positioning model with double-difference carrier phase observation to accomplish high accuracy positioning. In accordance with different deformation monitor mode, the processing methods of double-difference ambiguity are accordingly different. In periodical repeated monitor, we usually use routine GPS static relative positioning processing method; in stationary and continuous monitor, we can adopt a DC (direct calculation) method; while in real-time dynamic monitor, we choose a plan of known ambiguity transferring. The paper discusses the ambiguity processing procedures in three different deformation monitor modes, and uses examples proving them.

scholarly journals GPS Satellite Kinematic Relative Positioning: Analyzing and Improving the Functional Mathematical Model Using Wavelets

2009 ◽  
Vol 2009 ◽  
pp. 1-18 ◽  
Author(s):  
Eniuce Menezes de Souza ◽  
João Francisco Galera Monico ◽  
Aylton Pagamisse
Keyword(s):  
Mathematical Model ◽  
Kalman Filter ◽  
Functional Model ◽  
High Accuracy ◽  
Double Difference ◽  
Relative Positioning ◽  
Wavelet Method ◽  
Multipath Effect ◽  
Kinematic Relative Positioning ◽  
Insight Into

Although GPS kinematic relative positioning can provide high accuracy, GPS observables, like any other kind of measurement, are not free of errors. Indeed, they have several kinds of errors. In this paper, we show how to construct a functional mathematical model within the context of a Kalman Filter in order to eliminate most of these errors. Furthermore, we discuss how the multipath effect, a kind of error not modeled in the functional model, can be corrected using the proposed wavelet method. The behavior of the double difference functional model in the kinematic mode is also demonstrated and analyzed aiming to provide better insight into the problem. The results obtained from the multipath experiments were very promising and are presented here.

A New 1,000 kV Electron Microscope

1967 ◽  
Vol 25 ◽  
pp. 260-261
Author(s):  
M. Nishigaki ◽  
S. Katagiri ◽  
H. Kimura ◽  
B. Tadano
Keyword(s):  
Electron Microscope ◽  
High Voltage ◽  
Basic Research ◽  
Chromatic Aberration ◽  
High Accuracy ◽  
Biological Specimen ◽  
Voltage Electron ◽  
High Voltage Electron Microscope ◽  
High Voltage Electron

The high voltage electron microscope has many advantageous features in comparison with the ordinary electron microscope. They are a higher penetrating efficiency of the electron, low chromatic aberration, high accuracy of the selected area diffraction and so on. Thus, the high voltage electron microscope becomes an indispensable instrument for the metallurgical, polymer and biological specimen studies. The application of the instrument involves today not only basic research but routine survey in the various fields. Particularly for the latter purpose, the performance, maintenance and reliability of the microscope should be same as those of commercial ones. The authors completed a 500 kV electron microscope in 1964 and a 1,000 kV one in 1966 taking these points into consideration. The construction of our 1,000 kV electron microscope is described below.

Application Of BIM-Technology In The Restoration Of Buildings

2020 ◽  
pp. 42-48
Keyword(s):  
Chinese Communist Party ◽  
Laser Scanning ◽  
High Accuracy ◽  
Information Environment ◽  
Information Modeling ◽  
Structural Scheme ◽  
Traditional Design ◽  
Information Interaction ◽  
Heritage Buildings ◽  
Effective Organization

The paper describes the main trends in the development of BIM technologies in the field of restoration and reconstruction of historical and cultural heritage buildings. The practical part of the paper presents the experience in using information modeling technologies when restoring the building, where the VI Congress of the Chinese Communist Party in Moscow took place. The use of laser scanning technologies made it possible to reproduce with high accuracy in the information model the original appearance of the building using Autodesk RevitR software. It is shown, how the use of information modeling technologies affects the duration of restoration process, taking into account the calculation of the structural scheme and bearing structures of the building, ensuring the identity of the decoration and the effective organization of electromechanical installation. Operating in a single BIM information environment makes it possible to continuously obtain reliable information on the project, which provides more effective information interaction and communication of participants compared to using traditional design methods.

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