Robert Lee, mechanical engineer, describes the solid state telescope instrument. The solid state detector is used to measure charged particles moving very fast, with energies greater than about 30-300 keV. Robert Lee demonstrates how commands to the SST will cause a piece of metal to move mechanically in front of the hole where the particles can enter. Additionally, similar commands can cause the metal to move away from the hole. This metal piece is called an attenuator because it attenuates the number of particles that can make it to the instrument detector.