ARTHUR is an acronym for “Artillery Hunting Radar”, a mobile Passive electronically scanned array C-Band radar system (photo : Royal Thai Marine Corps)

ARTHUR is an acronym for "Artillery Hunting Radar", a mobile Passive electronically scanned array C-Band radar system (photo : Royal Thai Marine Corps)

ARTHUR is an acronym for “Artillery Hunting Radar”, a mobile Passive electronically scanned array C-Band radar system (photo : Royal Thai Marine Corps)

Patriot missile battery at an army base in the northern Polish town of Morag