Table 3.
Initial Number of Photons and Current Estimates for Most Likely Production Altitudea
| Date | Duration (σ)b | Altitudec | N ph(E > 1 MeV) | I mom | ΔM q |
|---|---|---|---|---|---|
| 27 May 2004 | 78 ± 18μs | 6 km (535 g/cm2) | 7 × 1019 | 200×ρ kA km | 39.1 × ρ C km |
| 8 km (414 g/cm2) | 2 × 1019 | 90 × ρ kA km | 17.7 × ρ C km | ||
| 10 km (316 g/cm2) | 3 × 1018 | 21 × ρ kA km | 4.2 × ρ C km | ||
| 7 Nov 2004 | 204 ± 17μs | 6 km (536 g/cm2) | 7 × 1020 | 764×ρ kA km | 390.9 × ρ C km |
| 8 km (409 g/cm2) | 2 × 1020 | 345×ρ kA km | 176.9 × ρ C km | ||
| 10 km (307 g/cm2) | 3 × 1019 | 82×ρ kA km | 42.0 × ρ C km | ||
| 12 km (227 g/cm2) | 6 × 1018 | 26×ρ kA km | 13.3 × ρ C km | ||
| 16 Oct 2006 | 44 ± 9μs | 8 km (410 g/cm2) | 3 × 1018 | 160×ρ kA km | 17.7 × ρ C km |
| 10 km (313 g/cm2) | 4 × 1017 | 38×ρ kA km | 4.2 × ρ C km | ||
| 12 km (234 g/cm2) | 4 × 1017 | 10×ρ kA km | 1.1 × ρ C km |
a
ρ is the gamma production effective constant defined as ρ = N re/N ph, where N re and N ph are the number of electrons and photons both with energy above 1 MeV in a RREA.
b
The duration given in this table is 1σ of the gauss fir to the lightcurve.
c
The atmospheric mass density is taken from MSIS‐E‐90 atmosphere model at the time and location of each TGF.