The $2.5 billion Mars Science Laboratory rover is closing in on the Red Planet for a white-knuckle descent to the surface using an untried "sky crane" technique to ensure a pinpoint landing on the floor of Gale Crater.
PASADENA, Calif. -- The Mars Science Laboratory rover, still attached to its drum-shaped interplanetary cruise stage, closed in on the Red Planet on Saturday, steadily accelerating under the increasing tug of the planet's gravity as it streaked toward a precisely targeted plunge into the martian atmosphere overnight Sunday for a high-stakes descent to the surface.
"The spacecraft and ground systems are all healthy and performing as expected," said MSL mission manager Arthur Amador. "The spacecraft is now in the EDL (entry, descent, and landing) approach configuration, in our final approach orientation, pointing our medium gain antenna within a degree of the Earth. We've got a strong telecom signal, receiving data at 2,000 bits per second.
The Mars Science Laboratory will attempt a pinpoint landing in Gale Crater overnight Sunday, autonomously executing a "guided entry" to a precision touchdown.
(Credit: NASA graphic)
"The power subsystem is healthy, our rover batteries are charged to 100 percent. The thermal and propulsion systems are nominal with stable temperatures and pressures, and the DSN (Deep Space Network) continues to perform well, tracking the spacecraft continuously and conducting two differential ranging passes per day."
As of Saturday morning, the Mars Science Laboratory was just 2.8 million miles from Mars after logging nearly 350 million miles since launch from Cape Canaveral last November. Flight controllers decided Friday the spacecraft's path toward Mars was accurate enough to forgo a preplanned trajectory correction maneuver.
"We're now right on target to fly through the eye of a needle, that is, our target at the top of the Mars atmosphere," said Amador. "The target is a box that's 3 kilometers (1.9 miles) by 12 kilometers (7.5 miles) in dimension. And we're flying right through it."
The Curiosity rover, seen in this computer graphic, is designed to operate on Mars for at least two years, searching for carbon compounds and signs of past or present habitability.
(Credit: NASA graphic)
A high-precision atmospheric entry is just the first step in a complex, high-speed series of events designed to get the nuclear-powered Mars Science Laboratory rover Curiosity safely to its landing ellipse on the floor of Gale Crater, within easy roving distance of a 3-mile-high mound of layered rock that represents a record of the Red Planet's enigmatic history.
Equipped with a robot arm, a drill, sample scoop, state-of-the-art instruments, and a suite of cameras, Curiosity is the most sophisticated robotic lander ever sent to another planet. Over the course of a planned two-year mission, the rover will search for carbon compounds, one of the key building blocks of life as it is known on Earth, and assess whether habitable environments ever existed, or still exist, on the Red Planet.
"This is a very complicated vehicle; it's way more complicated than (previous Mars rovers) or other vehicles we've flown in the past, and so it's going to take us a while to first check it out and then get into the science...that everybody wants to do," said Richard Cook, MSL deputy project manager.
"We're going to spend almost the entire month of August really checking out the vehicle, getting the first images. We'll obviously be getting science data during that, but we'll also be doing engineering checkouts of the instruments, of the sampling system, changing flight software, doing other things. Hopefully by early September we'll be at the point where we can do our first drive and have the vehicle begin to move around a little bit."
But first, it has to get there.
The Curiosity rover, seen in this computer graphic, is designed to operate on Mars for at least two years, searching for carbon compounds and signs of past or present habitability.
(Credit: NASA graphic)
A high-precision atmospheric entry is just the first step in a complex, high-speed series of events designed to get the nuclear-powered Mars Science Laboratory rover Curiosity safely to its landing ellipse on the floor of Gale Crater, within easy roving distance of a 3-mile-high mound of layered rock that represents a record of the Red Planet's enigmatic history.
Equipped with a robot arm, a drill, sample scoop, state-of-the-art instruments, and a suite of cameras, Curiosity is the most sophisticated robotic lander ever sent to another planet. Over the course of a planned two-year mission, the rover will search for carbon compounds, one of the key building blocks of life as it is known on Earth, and assess whether habitable environments ever existed, or still exist, on the Red Planet.
"This is a very complicated vehicle; it's way more complicated than (previous Mars rovers) or other vehicles we've flown in the past, and so it's going to take us a while to first check it out and then get into the science...that everybody wants to do," said Richard Cook, MSL deputy project manager.
"We're going to spend almost the entire month of August really checking out the vehicle, getting the first images. We'll obviously be getting science data during that, but we'll also be doing engineering checkouts of the instruments, of the sampling system, changing flight software, doing other things. Hopefully by early September we'll be at the point where we can do our first drive and have the vehicle begin to move around a little bit."
But first, it has to get there.
NASA's Mars Odyssey spacecraft will capture telemetry from the Curiosity rover as it descends to the surface, relaying the data back to Earth in near real-time. The Mars Reconnaissance Orbiter will record the telemetry as a backup and relay it back to Earth later. This graphic shows all three spacecraft at the moment of touchdown.
(Credit: NASA graphic)
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