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  (Source: mckaylaisnotimpressed.tumblr.com)

Mike Ravine, Advanced Projects Manager for Malin Space Science Systems  (Source: torynfarr/flickr)

A two-image panorama shot with the rover's 1024 x 1024 mono navigation cameras  (Source: NASA)
Reasons included the amount of data produced, the fact that they had to meet the needs of different cameras, and the team's familiarity with these sensors

NASA recently accomplished a huge feat by landing its Mars rover Curiosity on the Red Planet, but one of the questions on the minds of many was why such a sophisticated machine used 2 MP cameras.
 
Mike Ravine, a project manager from Malin Space Science Systems, was happy to answer that in an interview with Digital Photography Review. He said the main reasons for using 2 MP sensors in the cameras were the amount of data produced, the fact that they had to meet the needs of different cameras, and the team's familiarity with these sensors.
 
"There's a popular belief that projects like this are going to be very advanced, but there are things that mitigate against that," said Ravine. "These designs were proposed in 2004, and you don't get to propose one specification then go off and develop something else. Two MP with 8 GB of flash didn't sound too bad in 2004. But it doesn't compare well to what you get in an iPhone today."
 
The amount of data produced is a large reason for using 2 MP cameras. There just isn't enough bandwidth for anything more powerful because the cameras must share with other instruments. Curiosity sends data back to Earth via the UHF transmitter, which transmits to two spacecraft orbiting Mars. The data is then sent back to Earth, and this system only allows for 250 megabits per day to be shared amongst various instruments.
 
The 2 MP camera sensors also were the tools of choice for the use of four different cameras, including the MAHLI, MARDI and two Mastcams. Having four different sensors for each camera would be expensive and more difficult to maintain rather than having one type of sensor all across the board. 
 
The team's familiarity with the sensors was crucial, too. The team knew the behavior of Truesense imaging chips and Kodak's KAI-2020 chip, so it makes sense that they'd work with what they know. 
 
"We know how to clock them and drive them," said Ravine. "They're a very easy CCD to drive."
 
Other issues, like the low pixel count, are not an issue either since the two Mastcams will create images from multiple exposures. 
 
NASA rover Curiosity landed successfully on Mars earlier this week after launching from Cape Canaveral, Florida on November 26, 2011. Curiosity is a one-ton, nuclear-powered, Mini Cooper-sized science laboratory that will explore the Martian surface for the next two years. 

Source: Digital Photography Review



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RE: so..
By Samus on 8/11/2012 1:41:59 AM , Rating: 3
Although it isn't my thing (and I have a wife and baby daughter) I still believe prostitution should be legal. Like many black market activity, it's going to exist no matter what, and if legalized, it will become safer, keep people needlessly out of jail, and the quality will improve (think prohibition, drug use, etc.)

In countries where prostitution has been legalized, rape has been decreased so much that even the arguement that rapes aren't reported as much as they occur doesn't outweigh the huge margin of difference in countries that still ban prostitution. Furthermore, countries with legal prostitution have superior public health services (partly paid for by tax revenue from the business being 'on the books) and the increase in tourism is obviously another added benifit.

In countries where marijuana is legal or decriminalized, the prison systems have anywhere from an order of magnitude to 10 orders of magnitude less inmates. Imagine the reduced backpressure on the legal system as a whole from this very fact.

This country (the United States) is still the very best country in the world, but it is still very broken, and the sad thing is, many of the things that are broken are easily fixed, except the political system that keeps things broken.


RE: so..
By Ammohunt on 8/13/2012 3:08:23 PM , Rating: 2
quote:
In countries where marijuana is legal or decriminalized, the prison systems have anywhere from an order of magnitude to 10 orders of magnitude less inmates. Imagine the reduced backpressure on the legal system as a whole from this very fact.


The downside is that in those same countries the stored can't keep Doritos in stock and they have a surplus of soap; oh that no shortage of occupy protesters.


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