From: Non-monochromatic whistler waves detected by Kaguya on the dayside surface of the moon
Generation site | k | Detection by s/c | Resonance condition (fundamental) | Remark |
---|---|---|---|---|
Downstream of s/c | Sunward | Accessible if V g cos θ ks > Vsw | ω − ;∣k(Ve‖ − Vsw‖) cos θ kB ∣ = Ω e | Impossible as ω< Ω e |
ω − ∣k(Vi‖ − Vsw‖) cos θ kB ∣ = −Ω i | OK | |||
Anti-sunward | Inaccessible to s/c | (Accessible only on the limb) | ||
Upstream of s/c | Sunward | Accessible if Vg cos θ ks < Vsw (convected down) | ω − ∣k(Ve‖ − Vsw‖) cos θ kB ∣ = Ω e | Impossible as ω < Ω e |
ω − ∣k(Vi‖ − Vsw‖) cos θ kB ∣ = −Ω i | OK | |||
Anti-sunward | Accessible | ω+∣k(Ve‖ − Vsw‖)cos θ kB ∣ = Ω e | Not likely as ω obs ≪ Ω e | |
ω+∣k(Vi‖ − Vsw‖)cos θ kB ∣ = −Ω i | Impossible as ω obs > 0 |