|
Read Full Article Cited by
JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 104, NO. B2,
PAGES 2797–2816,
1999
Noise in GPS coordinate time series
Ailin Mao
Division of Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami,
Florida
Christopher G. A. Harrison
Division of Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami,
Florida
Timothy H. Dixon
Division of Marine Geology and Geophysics, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami,
Florida
Abstract
We assess the noise characteristics in time series of daily position estimates for 23 globally distributed Global Positioning
System (GPS) stations with 3 years of data, using spectral analysis and Maximum Likelihood Estimation. A combination of white
noise and flicker noise appears to be the best model for the noise characteristics of all three position components. Both
white and flicker noise amplitudes are smallest in the north component and largest in the vertical component. The white noise
part of the vertical component is higher for tropical stations (±23° latitude) compared to midlatitude stations. Velocity
error in a GPS coordinate time series may be underestimated by factors of 5–11 if a pure white noise model is assumed.
Received 11
February
1998;
accepted 28
September
1998.
Read Full Article Cited by
Citation: Mao, A., C. G. A. Harrison, and T. H. Dixon
(1999),
Noise in GPS coordinate time series,
J. Geophys. Res.,
104(B2),
2797–2816.
Copyright 1999 by the American Geophysical Union.
|