Share This Article:

Frequency Structures Vibration Identified by an Adaptative Filtering Techiques Applied on GPS L1 Signal

Abstract Full-Text HTML Download Download as PDF (Size:341KB) PP. 137-143
DOI: 10.4236/pos.2013.42013    4,048 Downloads   6,014 Views  

ABSTRACT

This paper is part of a research under enhancement since 2001, in which the main objective is to measure small dynamic displacements by analysis of L1 GPS carrier frequency with 1575.42 MHz—wavelength 19.05 cm, under an adaptive method for collecting data and filtering techniques. This method, named Phase Residual Method (PRM) is based on the frequency domain analysis of the phase residuals resulted from the L1 double difference static data processing of two satellites in almost orthogonal elevation angle. In this work it is proposed to obtain the phase residuals directly from the raw phase observable collected in a short baseline during a limited time span, in lieu of obtaining the residual data file from regular GPS processing programs. In order to improve the ability to detect millimetric displacements, two filtering techniques are introduced. The first one is the autocorrelation that reduces the phase noise with random time behavior. The other one is the running mean to separate low frequency from the high frequency phase sources. Two trials are presented to verify the proposed method and filtering techniques applied. One simulates a 2.5 millimeter vertical GPS antenna displacement and the second using the data collected during a bridge dynamic load test. The results show a good consistency to detect millimetric oscillations from L1 frequency and filtering techniques.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Larocca, A. , Schaal, R. , Guimarães, G. , Silveira, I. and Segantine, P. (2013) Frequency Structures Vibration Identified by an Adaptative Filtering Techiques Applied on GPS L1 Signal. Positioning, 4, 137-143. doi: 10.4236/pos.2013.42013.

References

[1] A. P. C. Larocca and R. E. Schaal, “Millimeters in Motion Dynamic Response Precisely Measured,” GPS World, Vol. 16, No. 1, 2005, pp. 16-23.
[2] A. P. C. Larocca, R. E. Schaal and M. C. Santos, “Using GPS to Monitor Movement of a Cable-Stayed Bridge,” Professional Surveyor Magazine, Vol. 5, No. 3, 2005, pp 15-19.
[3] A. P. C. Larocca, R. E. Schaal and A. C. B. Barbosa, “A Low-Frequency Vibrations Detection with High-Rate Data and Filtering,” GPS World, Vol. 21, No. 4, 2010, pp. 28-35.
[4] A. P. C. Larocca, “Using High-Rate GPS Data to Monitor the Dynamic Behavior of a Cable-Stayed Bridge,” Proceedings of 17th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS ’04), Long Beach, 21-24 September 2004.
[5] A. P. C. Larocca, R. E. Schaal and G. N. Guimarães, “Use of a Single L1 GPS Receiver for Monitoring Structures: First Results of the Detection of Millimetric Dynamic Oscillations,” Journal of Surveying Engineering, Vol. 138, No. 2, 2012, pp. 92-95. doi:10.1061/(ASCE)SU.1943-5428.0000070
[6] T. Irvine, “The Tacoma Narrows Bridge Failure,” Revision A. Newsletter, 2001. http://www.vibrationdata.com/Newsletters/September2001_NL.pdf
[7] E. O. Brigham, “The Fast Fourier Transform and Its Applacations,” Prentice-Hall, Inc., New Jersey, 1974, pp. 1-252.
[8] A. Leick, “GPS Satellite Surveying,” 3rd Edition, Wiley, New York, 2004. pp. 1-435.
[9] F. D. Patrick, “Measurement and Data Analysis for Engineering and Science,” McGraw-Hill, New York, 2005.
[10] A. P. C. Larocca, “Using High-Rate GPS Data to Monitor the Dynamic Behavior of a Cable-Stayed Bridge,” Proceedings of 17th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS ’04), Long Beach, 21-24 September 2004.
[11] G. Hirsh and H. Bachmann, “Vibration Problems in Structures and Suspension and Cable-Stayed Bridges,” In: Bulletin d’Information No. 209. Chapter 3.6, Comité Euro-International du Béton (CEB), Lausanne, 1991, pp. 109-144.

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.