早期 そうき警戒 けいかい管制 かんせい でしょう
sō kikeika ikan seikideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 早期警戒管制機

1. Early warning control aircraft, probably.; It will likely be an early warning control aircraft.

Polite
Presumptive
Conjecture