Posted by
CmdrTaco
on from the congrats-from-the-news-nerds-to-the-nasa-nerds dept.
tvh2k writes "CNN reports that both the Mars Rovers Spirit and Opportunity are now both fully functional. Working on opposite sides of the red planet, they have begun analyzing rock and soil samples."
if it can dust one thing, why not another
by
rritterson
·
· Score: 5, Interesting
From the CNN article, apparantly Spirit can dust off a rock. It doesn't say how though, but I would guess either compressed air brought from earth (unlikely), a little air compressor, or a brush of some sort.
Now, apparantly the lifetime of the rovers is limited by the rate at which dust build up on the solar panels. How hard could it have been to reticulate the arm so that it can bend around and dust the panels off themselves? Even if it were to cost $1mil, it'd still be worth it as it would extend the lifetime of the rovers indefinately.
(Personally, I'd still like to see a better solution- have the rovers shake like dogs do when they get wet)
-- -Ryan AUWYHSTOT (Acronyms are Useless When You Have to Spell Them Out Too)
More, nearer.
by
LoudMusic
·
· Score: 5, Interesting
I heard rumblings a while back (may have been on/.) about alternative space exploration to our current methods. Basically launching hundreds of smaller robots at a task rather than a single highly developed bot. They mentioned lots of benefits, like 80% failure rate would still generate something. Additionally they would be near eachother and possibly work together and even repair one-anothother.
Has there been anymore talk about things like this?
-- No sig for you. YOU GET NO SIG!
Erosion caused by water
by
nycsubway
·
· Score: 3, Interesting
I have seen many many pictures of the erosion and channels and lake beds on mars over the years. Many many pictures... and they all looked very convincing, because it was so similar to the effects that water has on earth.
Then at the start of the Spirit and Opportunity landings, I started to think about it more. Something bothered me about the way the erosion appeared. It seemed there was no source for the water. I started thinking what might have caused features similar to that caused by running water. I think it is caused my lava flows. I could be completely wrong, and probably am, but maybe what I interpret as not being features caused by water, are really features that were caused by a very early and short-lived time of running water.
The launches are clustered so tightly (2 weeks) because the optimal launch window for mars occurs every two years. Otherwise, it might make sense to do a yearly launch so that design problems (like the flash memory error) can be thoroughly tested and fixed.
Having two rovers operating at the same time might cause a reliability problem... if spirit had kept randomly transmitting at odd times, it might have interefered with good data being sent from opportunity. Nasa thought of that, and that's probably why the two rovers are on opposite sides of the planet - hence, only one is visible to earth and/or the relay satellite at a time, so they can't interfere.
water source
by
Shooter6947
·
· Score: 4, Interesting
The water source for the Martian channels is weird. It is certainly not rain: the channels don't spread out enough and there are closed drainage systems. Planetary scientists (I am one) think that the channels might have been formed by sapping: the water comes out of the ground in a spring.
What I still haven't seen is a full, technical explanation of what went wrong in the first place, and (more importantly) why it wasn't caught in ground testing. One would imagine that flash-contention issues would be relatively easy to bench test.
As with Pathfinder, NASA seems to have run into testable software issues only after the hardware is on another planet. I'd like to see more morning-after analysis on this both so NASA can improve its process for future missions, and so that we can all learn something about software testing for our own projects.
Does anyone know of place (web page, mailing list, whatever) where this is being discussed on a deep technical level?
-- When all you have is a hammer, everything looks like a skull.
Slashdot Mirror
So, is the power leakage on the Opportunity rover also fixed or are they just going to put up with a shorter lifespan of the machine?
Your pizza just the way you ought to have it.
From the CNN article, apparantly Spirit can dust off a rock. It doesn't say how though, but I would guess either compressed air brought from earth (unlikely), a little air compressor, or a brush of some sort.
Now, apparantly the lifetime of the rovers is limited by the rate at which dust build up on the solar panels. How hard could it have been to reticulate the arm so that it can bend around and dust the panels off themselves? Even if it were to cost $1mil, it'd still be worth it as it would extend the lifetime of the rovers indefinately.
(Personally, I'd still like to see a better solution- have the rovers shake like dogs do when they get wet)
-Ryan
AUWYHSTOT (Acronyms are Useless When You Have to Spell Them Out Too)
I heard rumblings a while back (may have been on /.) about alternative space exploration to our current methods. Basically launching hundreds of smaller robots at a task rather than a single highly developed bot. They mentioned lots of benefits, like 80% failure rate would still generate something. Additionally they would be near eachother and possibly work together and even repair one-anothother.
Has there been anymore talk about things like this?
No sig for you. YOU GET NO SIG!
I have seen many many pictures of the erosion and channels and lake beds on mars over the years. Many many pictures... and they all looked very convincing, because it was so similar to the effects that water has on earth.
Then at the start of the Spirit and Opportunity landings, I started to think about it more. Something bothered me about the way the erosion appeared. It seemed there was no source for the water. I started thinking what might have caused features similar to that caused by running water. I think it is caused my lava flows. I could be completely wrong, and probably am, but maybe what I interpret as not being features caused by water, are really features that were caused by a very early and short-lived time of running water.
http://github.com/gbook/nidb
The launches are clustered so tightly (2 weeks) because the optimal launch window for mars occurs every two years. Otherwise, it might make sense to do a yearly launch so that design problems (like the flash memory error) can be thoroughly tested and fixed.
Having two rovers operating at the same time might cause a reliability problem... if spirit had kept randomly transmitting at odd times, it might have interefered with good data being sent from opportunity. Nasa thought of that, and that's probably why the two rovers are on opposite sides of the planet - hence, only one is visible to earth and/or the relay satellite at a time, so they can't interfere.
HIV Crosses Species Barrier... into Muppets
The water source for the Martian channels is weird. It is certainly not rain: the channels don't spread out enough and there are closed drainage systems. Planetary scientists (I am one) think that the channels might have been formed by sapping: the water comes out of the ground in a spring.
What I still haven't seen is a full, technical explanation of what went wrong in the first place, and (more importantly) why it wasn't caught in ground testing. One would imagine that flash-contention issues would be relatively easy to bench test.
As with Pathfinder, NASA seems to have run into testable software issues only after the hardware is on another planet. I'd like to see more morning-after analysis on this both so NASA can improve its process for future missions, and so that we can all learn something about software testing for our own projects.
Does anyone know of place (web page, mailing list, whatever) where this is being discussed on a deep technical level?
When all you have is a hammer, everything looks like a skull.