This means that the excitation of aurora during the main phase can not be attributed to the precipitation of electrons into atmosphere caused by the slow change of geomagneticfield.
因此，主相时所观测到的极光，并不是由于地磁场的平缓下降使小投掷角电子注入大气层而形成的。
2
The main error sources in the geomagneticfield model were introduced, too.