Radar reflectors have many applications. They are usually mounted on small boats to increase their radar fingerprint (source), and they are part of the emergency equipment on board a lifeboat.(source)
However, I had no idea that they were used on board spacecraft, so I find it very intriguing.
- Why is this astronaut placing a radar reflector?
- Are radar reflectors used consistently during space missions or was this just part of an experiment?
- Can anybody identify which STS mission this was?