The latest civilian to join a space station crew is U.S. businessman Gregory Olsen. He launched on a Russian Soyuz spacecraft from Baikonur, Kazakhstan Saturday with cosmonaut Valery Tokarev and U.S. astronaut William McArthur. But Mr. Olsen will do more than just tour and look casually out the window. The U.S. space agency NASA, which calls him a space participant, says that for the week he will be aboard the space station, his observations will have a scientific purpose – remote sensing and infrared astronomy. That is befitting for his background as an electrical engineer who founded a New Jersey company called Sensors Unlimited, that produces electronic optical devices for fiber optic communications systems.