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. The hole is approximately 2.65 Millimeter s deep.]] The Rock Abrasion Tool (RAT) is a grinding and brushing installation on NASA’s twin Mars Exploration Rovers, Spirit (MER-A) and Opportunity (MER-B), which landed on Mars in January of 2004. It was designed, developed and continues to be operated by Honeybee Robotics LTD, a developer of specialized robots, automated technologies and related systems. The RAT was the first machine to gain access to the interiors of interplanetary rocks. The RAT weighs 685 g (about 1.51 lbs), is 7 cm (2.76 inches) in diameter and 10 cm long (3.94 inches), about the size of a soda can. It uses a diamond dust and resin wheel spinning at 3000 rpm to drill a 45 mm diameter by 5 mm deep bore hole in Martian Rocks. The RAT then uses two brushes to sweep dust from the bore holes for closer scientific inspection. It uses just 11 watts of power over the course of this lengthy task. There are five other instruments aboard both rovers, these are the Pancam (a camera), Mini-TES (an infrared spectrometer) for sensing targets at a distance, a Microscopic Imager, and Moessbouer and Alpha Particle X-ray spectrometers. The RAT provides these instruments with a smooth, clean surface from which they make more accurate observations. The RAT was first used by the Martian Rover Spirit on its 34th sol (February 24th on Earth). It was held up to the rock Adirondack, whereby it scraped to a depth of 2.85 mm over the course of 3 hours. Since then it has been used on numerous Martian rocks surrounding the landing site. The RAT was originally controlled from NASA’s Jet Propulsion Laboratories in Pasadena, California, but is now run by Honeybee Robotics LTD from their New York headquarters. The RAT is the first product of Honeybee Robotics LTD’s to be sent into space by NASA. |
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