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[TR] NASA's $2.5bn Curiosity rover: Apple PowerBook specs on wheels - Page 7

post #61 of 183
Just think!

The Curiosity rover weighs less than what our laptops did back in 1997, way to innovate NASA!
    
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post #62 of 183
They forgot to install a hyper 212+ on that thing so it doesn't overheat when it gets to Mars.
post #63 of 183
Is there an actual reason why they don't use a more powerful chip?

Like there would be NO advantage of putting a more modern cpu in it? More processing power = bad somehow?
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post #64 of 183
Quote:
Originally Posted by icehotshot View Post

Is there an actual reason why they don't use a more powerful chip?
Like there would be NO advantage of putting a more modern cpu in it? More processing power = bad somehow?

Read below.
Quote:
Originally Posted by DuckieHo View Post

This is actually stricter than enterprise standards... this is aerospace. I am not sure which is strictest... medical, aerospace, or military.
This is different from a "new gene sequencer" because you cannot send someone to fix it ever. It is always about risk/benefit.... Mars missions historically have a bad track record. Based on this, NASA made the decision to overbuild.... I believe every primary system is fully redundant?
Yes, I would trust NASA engineered and optimized software designed for specific platform to do anything that it was designed for. It's not like they are writing software and hoping it works. They have written the software and tested thousands of times.
I already explained why they choose not to use current or upcoming technology. It is unproven. A manufacturing flaw like the Intel Cougar Point SATA controller or errata like the Phenom I were not discovered until a few months after production. Developing a custom CPU would just drive up costs and you still would have the risk with unproven technology.
post #65 of 183
Quote:
Originally Posted by kikkO View Post

In fact everyone in the Jet Propulsion Lab in California use Macbook Pros.

Not necessarily. I've seen some of them using iPads but there's still some PCs.
post #66 of 183
Quote:
Originally Posted by icehotshot View Post

Is there an actual reason why they don't use a more powerful chip?
Like there would be NO advantage of putting a more modern cpu in it? More processing power = bad somehow?

Reliability is more important than performance.

Scientists are will to wait longer rather than increasing failure rate. Slow data is better than no data.
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post #67 of 183
Quote:
Originally Posted by PostalTwinkie View Post

Just think!
The Curiosity rover weighs less than what our laptops did back in 1997, way to innovate NASA!

Really?

How much did it weigh?
Quote:
Originally Posted by icehotshot View Post

Is there an actual reason why they don't use a more powerful chip?
Like there would be NO advantage of putting a more modern cpu in it? More processing power = bad somehow?

See duckies very detailed responses tongue.gif.
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post #68 of 183
I wish I could downvote posts on here. rolleyes.gif
post #69 of 183
Space shuttle Columbia exploded during re-entry in 2003. This was one of the HDDs on it.... a 400MB Seagate. That means in 2003, they were still using a HDD from around 1991!


99% of the data was recovered from it.....
After surviving an explosion....
At Mach 19....
Falling from an altitude of 35mi....




Edited by DuckieHo - 8/9/12 at 12:55pm
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post #70 of 183
Quote:
Originally Posted by DuckieHo View Post

Reliability is more important than performance.
Scientists are will to wait longer rather than increasing failure rate. Slow data is better than no data.
Exactly!
It's not even slow data... The rover does very basic motion and avoidance work that people write to work on 16MHz processors. This cpu just sends the data back after some arduous compression and lets our super computers here on earth do the brute work.

Industrial systems can run 100% all the time. With negligible degradation I might add.
I dare anyone even here on OCN to show me that they use 100% or their cpu 24/7 for years:
1. Without crashing... ever
2. Without electron leakage of any kind, corrupting data.

Bigger is almost never better if you know exactly what your application must do.

LOL I GOT A 5GHz Printer controller cuz I can !!!1!1!! ....

/Fume
--David--
Edited by Helmsdg - 8/9/12 at 12:57pm
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