SONG OF THE AURORA

C(x,t) = ∫L(x,τ)dτ
δ(now) when C·Ω = 1
R = ∫φ·exp(C/Ω)·Θ dτ

§NIST O(¹S→¹D) 557.7 nm · τ=0.74 s
§NIST O(¹D→³P) 630.0 nm · τ=154 s
§CRR exp(−α·Ω·d) — the colour of water