こう高度 こうど放電 ほうでん発光 はっこうじゃありませんでした
kō kōdohōdenhakkōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 高高度放電発光

1. Was not high-altitude discharge luminescence.; Was not a high-altitude discharge glow.

Past/Perfective
Negative
Polite
Terminal Form