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Table 4 Comparison of RQA measures for data set CNST_e, as raw data (column 1), with nonlinear noise reduction (column 2) and with noise reduction using the regional filter method (column 3; Beavan et al. 2004)

From: Nonlinear dynamical analysis of GNSS data: quantification, precursors and synchronisation

Data set

1. CNST_e

Raw one-day data

2. CNST_e

Nonlinear noise removal

3. CNST_e

Regional filter

% change of # 2 with respect to 1

% change of # 3 with respect to 1

%REC

38.44

38.44

36.48

0

5.10

%DET

97.48

97.48

97.31

0

0.17

LMAX

2687

2688

2676

− 0.04

0.41

ENT

4.28

4.28

3.8

0

11.21

TREND

− 7.05

− 7.02

− 10.02

− 0.43

− 42.13

%LAM

98.21

98.21

97.99

0

0.22

VMAX

411

411

446

0

− 8.52

TTIME

40.1

40.1

31.85

0

20.57