Long before NASA’s Perseverance Rover landed on Mars years of prototyping and testing was first completed here on Earth. Mega Speed high speed Gforce cameras were used during the initial testing and verification of the decelerator designs intended to decelerate Perseverance Rover’s high velocity space craft before landing on Mars. High speed image data was needed during the critical testing of various decelerator designs that included inflatable decelerators as well as large parachute decelerators. It would be absolutely critical that the decelerator design be able to slow the space craft down sufficiently in Mars very thin atmosphere for a safe landing.