What does OPIR stand for in the context of intelligence?

What does OPIR stand for in the context of intelligence?

• A. Orbital Positioning and Imaging Radar
• B. Overhead Persistent Infrared
• C. Onboard Processing and Information Relay
• D. Optical Photographic Imaging Range

Answer: (B)

OPIR stands for Overhead Persistent Infrared. The idea is a space-based infrared sensing system that stays on station to continuously monitor large areas from above, so it can detect new or changing heat sources like missile plumes or hot equipment. Infrared detects heat, not visible light, which lets it see heat signatures even in daylight or through some weather—key for early warning and persistent surveillance. The terms “overhead” and “persistent” emphasize the vantage (from above, in orbit) and the ongoing coverage. The other options don’t fit because they describe different concepts (like optical or radar imaging) or on-board processing rather than the infrared sensing modality itself.

OPIR stands for Overhead Persistent Infrared. The idea is a space-based infrared sensing system that stays on station to continuously monitor large areas from above, so it can detect new or changing heat sources like missile plumes or hot equipment. Infrared detects heat, not visible light, which lets it see heat signatures even in daylight or through some weather—key for early warning and persistent surveillance. The terms “overhead” and “persistent” emphasize the vantage (from above, in orbit) and the ongoing coverage. The other options don’t fit because they describe different concepts (like optical or radar imaging) or on-board processing rather than the infrared sensing modality itself.