'Extreme Programming' Controls Phoenix Mars Lander 119
pbd points out a story discussing the challenges faced by NASA engineers in designing the code sent to operate the Phoenix Mars Lander. Quoting Computerworld:
"On Wednesday, engineers sent up the code to run an actual analysis, but a satellite orbiting Mars, which transfers the data down to the Lander, was offline. Robinson explained that the satellite had been hit with radiation, knocking it into safe mode. 'Space is a harsh environment, and sometimes they just go into safe mode,' he noted. 'It's a minor problem. [The satellite] aborts whatever it was doing and waits for future commanding.' Engineers successfully resent the code on Thursday."
No mention of Extreme Programming (Score:5, Informative)
There's just one sentence which says something about "presents extreme programming challenges" which is the closest this article comes to mentioning Extreme Programming.
Re:Um what (Score:1, Informative)
Re:Um what (Score:4, Informative)
Re:That's coolness (Score:2, Informative)
Re:That's coolness (Score:5, Informative)
TFA appear to be wrong. It runs VxWorks 5.2 [windriver.com].
The confusion probably arose because Wind River also sells a Linux version, and the press sometimes confuses that with VxWorks.
Some other interesting points about that article (Score:5, Informative)
about when to really go for a scoop of soil.
2. Only 3 months before it will get too cold and the lander will (probably) die.
3. Martian day, (roughly 24hrs 40mins).
The NASA programmers have been my heroes ever since the hacks they did to Voyager.
I guess after they've finished the programmers will take up something more relaxing (like working for EA).
Andy
Re:Say What!? (Score:4, Informative)
1. We had years of libraries that were QNX specific
2. There were real time requirements that Plain Linux was not up to(real time linux may be... but you are talking a major porting project)
3. We had literally man-decades of programming experience in our team.
4. We were using a database soultion that was not available on Linux(and is still not)
SO the upshot is... it is often a decision to either have something working now to do the job or wait another few man-years before a (probably buggier) version is done for Linux. Its not anti-Linux. Its just common sense.
Re:That's coolness (Score:3, Informative)
That is the issue, isn't it? You might be glad, but there are people who do not want to contribute and they were forced to do so.
Not sure if you have noticed, but there are a few things we are running out of here despite China's one child rule.... room, food, fuel, and some other less dramatic things. Mother nature has a way of balancing things, so she'll kill a lot of us off.
This [wikipedia.org] might interest you.