One of the payloads destined for the International Space Station is the Cloud-Aerosol Transport System, or CATS. It’s a remote-sensing instrument that relies on lidar technology – similar to a radar, but using a laser instead of sound – to study the location, makeup and distribution of aerosols, pollution, dust, smoke and other particulates in Earth’s atmosphere. To learn more about CATS, view the replay of last week’s briefing from Kennedy Space Center: