Meet the engineer behind NASA's robotic arm for Mars

Standing at the porch of his house in Ghana, as a young boy, Ashitey Trebi-Ollennu was fascinated by the planes that flew in and out of the airport. But his dreams were not to be a pilot, his imagination was more unique than that.

He envisioned a future where robots would fly the planes. "I was fascinated by replacing human pilots with computers. I was very interested in that as a young kid."

Many years after, the young dreamer has surpassed his imagination. He is now a lead engineer on InSight - NASA's spacecraft which recently landed on Mars. He is in charge of the mission's robotic arm mechanism.

What does the robotic arm do?

The goal of InSight is to understand how planets are formed. But to do so, there is need to look deep beneath the surface. "You have to look at the core of the planet," says Ollennu, Instrument Deployment Systems Lead on InSight.

InSight's robotic arm will place scientific instruments off the InSight lander onto the surface. "Our responsibility is to pick up the instruments that the scientists are going to use to examine the planets hundreds of millions of miles away," Ollennu said.

The arm, more than 5 feet 9 inches (1.8 meters) long, has a camera attached that will provide 3D color views of the landing site. It is designed to place the seismometer on the surface and position the heat flow probe - a mole that can burrow 16 feet (five meters) into the ground.

It will take two to three months for InSight's robotic arm to set the mission's instrument on the surface.



For now, the robotic arm will be taking pictures of Mars.

"We're going to take a selfie of the land," Ollennu told CNN via Skype. "We are going to take the imagery of the workspace, and then we are going to start planning how to get the instrument to the surface."

The engineer majored in Avionics at the Department of Aeronautical Engineering, Queen Mary College, University of London and then obtained a Ph.D. in Control Systems Engineering, at Cranfield University in the United Kingdom.

He then moved to the US to do further research in robotics at Carnegie Mellon University in Pittsburgh.

"This is my fifth mission landing on mars that we are working on. I've been working on Mars for like 20 years now," he says.

His former projects on Mars includes: the 2003 Mars Exploration Rover, Phoenix Mars Lander of 2007, Mars Science Laboratory in 2011, and the 2016 Insight Mars Lander.

Ollennu has obtained numerous awards and recognition for his works. Some of which includes the 2008 NASA Exceptional Engineering Achievement Medal for his contributions to the Mars Exploration Rover mission, and the 2010 Specialist Silver Award from the Royal Aeronautical Society in the UK.

But he is not slowing down anytime soon. Ollennu's drive is "to advance human knowledge."

"One of the things that people forget is that prehistoric times across the continent of Africa, Europe and Asia our forefathers looked to the heavens and mapped the constellations. And what did they do with them? They created calendars so they can know when to harvest, when to plant ...they just looked up into space and then they did all this mapping," he said.

"Humans always look to the heavens to gain knowledge and use that knowledge to make life a little better and that's exactly what we do at NASA, said Ollennu. "And that's exactly what InSight is going to do."

Ollennu says he believes that he is lucky to have had a "solid" academic foundation in Ghana Senior High Technical School, a Science and Technology oriented high school in Takoradi. "There you get to do a lot of woodwork, metalwork, engineering, drawing so that kind of gives you a very good balance and a lot of science as well," he said.