Research Article
Accurate Method for Picking Up the First Arrival Time of Microseismic Signals Based on Entropy Theory
Table 2
Pickup time for different methods with different SNRs.
| | Method | Signal-to-noise ratio | | No added noise | 20 dB | 10 dB | 2 dB |
| | STA/LTA method | 1012.1 | 1012.3 | 1013.4 | 1015.0 | | Fractal method | 1011.3 | 1011.7 | 1012.1 | 1013.9 | | Entropy method | 1011.3 | 1011.5 | 1011.9 | 1012.9 |
|
|
