The sporadic meteor radiant distribution (SMRD) varies with latitude; therefore it is very crucial to accurately predict the SMRD and thus to change the direction of antennae and improve the data rate.

By investigating the development of the modeling of meteor radiant distributions,the relationship of meteor signals over forward-scatter links and ecliptic coordinate system is obtained,and the transformation from the heliocentric to the geocentric radiant distribution of sporadic meteor is derived.

Under the condition of small amplitude,the operating equations of the wiggler are given,and then,the trajectories of the beam electrons and the angular spectrum of spontaneous emission are derived.

Dynamic emulation of the effects from individual tree to lower solar radiation distribution;