Table 2. Arbitrarily chosen SCs from the checked data set. These examples show the capability of the algorithm to determine the SC timing correctly and its immunity against alarming false triggers. Times are expressed in UT of the respective days and in units of sample (1 sample = 3 s).
From: Effect of SC on frequency content of geomagnetic data using DWT application: SC automatic detection
Serial | Date and station | Arrival times of SCs by the NGDC (samples) | Algorithm detection times | Error (samples) | Rate of variation of SC |
|---|---|---|---|---|---|
1 | 2001-08-17 KAG | 13260 | 13255, 15930, 19705, 24380, 25025 | −5 | 0.5 |
2 | 2001-08-17 ONW | 13260 | 13250, 13335, 13680, 14155, 14390 | −10 | 0.84 |
3 | 2004-01-22 KUJ | 1928 | 1925, 2000, 2150, 2525, 2640 | −3 | 4.06 |
4 | 2004-01-22 ONW | 1929 | 1925, 2005, 2150, 2390, 2510 | −4 | 2.68 |
5 | 2004-08-29 KUJ | 12110 | 12145, 18210 | 35 | 0.23 |
6 | 2004-08-29 ONW | 12110 | 12145 | 35 | 0.22 |
7 | 2004-12-05 KAG | 9327 | 1765, 7080, 9325, 9670, 10510 | −2 | 0.65 |
8 | 2004-12-05 KUJ | 9328 | 9325, 9395, 9635, 9700, 10300 | −3 | 1.22 |
9 | 2004-12-05 ONW | 9335 | 9365, 10585, 10630, 11815, 19155 | 30 | 1.16 |
10 | 2005-01-21 KAG | 20630 | 4770, 13010, 13725, 20395, 20605 | −25 | 2.29 |
11 | 2005-01-21 KUJ | 20630 | 20600, 20715, 20845, 21050, 21340 | −30 | 3.46 |
12 | 2005-01-21 ONW | 20630 | 5250, 20610, 20755, 21055, 21290 | −20 | 2.8 |