Table 1 Estimated TEC of once per one, 10, and 100 years in Tokyo, Kagoshima, and Hokkaido
Once-in-1-year TEC | Once-in-10-year TEC | Once-in-100-year TEC | ||||
|---|---|---|---|---|---|---|
22-year TEC data | Method 1 | Method 2 | Method 1 | Method 2 | ||
Tokyo | ~ 90 | ~ 110 | ~ 110 | ~ 130 | ~ 150 | ~ 190 |
Kagoshima | ~ 110 | ~ 130 | ~ 130 | ~ 155 | ~ 180 | ~ 230 |
Hokkaido | ~ 70 | ~ 90 | ~ 90 | ~ 105 | ~ 120 | ~ 150 |