He was a test pilot. He had flown earlier on one of the two-man Gemini space flights.

VOA: special.2009.07.15

We were using a test-chat room, test space chat room, where they were able to communicate with Professor Low, to ask questions and to exchange views and to have this feedback on their projects.

我们利用聊天室，进行测试，在那里,学生能和Low教授沟通，问问题，交流观点,并获得有关项目的反馈。

麻省理工公开课 - 媒体、教育、市场课程节选

They're very efficient." Not far from Taylor Glacier, researchers for the American space Agency are using the icy Lake Bonney to test an underwater robot vehicle.

VOA: special.2009.06.03

They wanted a plane that could test conditions for future flights into space.

VOA: special.2010.07.07

It was designed to test equipment and conditions for future space flights.

VOA: special.2010.07.07

Gemini would test the men's ability to live and work in space.

VOA: special.2009.06.24