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Students Take Pictures From Space On $150 Budget
An anonymous reader writes "Two MIT students have successfully photographed the earth from space on a strikingly low budget of $148. Perhaps more significantly, they managed to accomplish this feat using components available off-the-shelf to the average layperson, opening the door for a new generation of amateur space enthusiasts. The pair plan to launch again soon and hope that their achievements will inspire teachers and students to pursue similar endeavors."
Groups like EOSS have been doing this for at least 30 years, probably more. It's very common for a balloon launch to be a featured event in a ham radio conference. Their budgets per payload are similar, although they are able to do more technical work than featured in the MIT students work and often design their own radios, command devices, etc. None of this, though, is out of the range of a dedicated amateur. Note that there is a software-defined GPS in development that might be the best way to get around the 20K foot altitude limit of consumer GPS devices. Its component cost is pretty low, despite the $495 cost charged for an assembled device at that site.
Bruce Perens.
That's why use of cell phones at altitude is illegal. They illuminate thousands of cell cites all of the way to the horizon, and probably lock users out of a frequency on every one of those sites. It's sort of a denial-of-service attack.
Bruce Perens.
The GPS cell phone we used to track the location of our vehicle lost reception soon after launch (at an elevation of ~2500 feet).
So I'm guessing it gave it's location up to 2500 feet, disappeared, then reappeared when it went below about 2500 feet.
It would only need to be when its nearing the ground.
I am a free slashdotter. I will not be modded, blogged, DRM'd, patented, podcasted or RFID'd. My life is my own.
This is a fairly standard high-altitude photography method, that is just being hyped up. You attached a camera to a helium balloon. Whoop-de-fucking-doo. Doesn't have anything to do with space.
If we can put a man on the moon, why can't we shoot people for Apollo-related non-sequiturs?
The terminal velocity of falling objects varies according to the weight of the object and the air resistance. A foam cooler and some ropes and torn balloon falling from altitude don't go very fast. Note that their descent took 40 minutes, and it was probably faster in thin air than thick.
There was an interesting mythbusters on falling bullets. They couldn't get much force out of them.
Bruce Perens.
Not anymore my friend, not anymore. Not since the nineties at least.
Oh and by the way:
"You and I in a little toy shop
Buy a bag of balloons with the money we've got.
Set them free at the break of dawn
'Til one by one, they were gone.
Back at base, bugs in the software
Flash the message, Something's out there.
Floating in the summer sky.
99 red balloons go by."
Bugs in the software, eh? Well, they may still have them. Maybe it is still a relevant song.
I never knew there was an english version:
http://www.eightyeightynine.com/music/nena-99luftballoons.html
It has been toned down quite a bit.
Je me souviens.
According to the Federation Internationale D'espace, space begins at 62 miles, about 100 kilometers. Often referred to as the 62 mile club.
Cheers.
Yet Socrates himself is particularly missed.
A lovely little thinker but a bugger when he's pissed.
No, I found the same cell phone for $40 at many online places, it took 30 seconds to do a search.
Correct. A balloon can't be in space, simply because there must be atmosphere for the balloon to be lighter than, or it can't rise. Never mind that they tend to expand and explode before they reach that theoretical height...
Normally, what we consider the start of space is around 10 times as far out as the record for helium balloons. Even hydrogen balloons can get nowhere near space. If you could make a balloon filled with hard vacuum, you would be able to almost, but not quite, reach space.
So the correct tag for this article is !space
Some High School Students from Bilbao, Spain, did the same thing earlier this year for less than $100. Looking at the photos, it seems they got better shots.
Story here:
http://www.telegraph.co.uk/news/newstopics/howaboutthat/5005022/Teens-capture-images-of-space-with-56-camera-and-balloon.html
Photos here:
http://www.flickr.com/photos/meteotek08/sets/
Well, somehow, it is already being exploited..
It is used to *reduce* the overall kinetic energy of a re-entering bolide so that the acceleration (and hereby force) to which the payload is submitted at impact doesn't damage said payload.
And also.. the overall energy dissipated during atmospheric re-entry cannot exceed the amount of energy used to put the object wherever - and at whatever velocity - it was before re-entry. So if you are worried about energy expenditure.. just don't launch !
--Ivan
Cambridge University and some UK high school (US Middle school) kids did this in 2008 - http://www.admin.cam.ac.uk/news/dp/2008120401
You either need to divide by zero or dereference a null pointer inside it.
Atmospheric burn-up is caused as you lose orbital velocity when you contact the atmosphere. As balloons and their payloads were never in orbit in the first place, there is no worry about anything burning up.
#naabhaprzrag, #sverubfr-000, #agi-fcbafberq, negvpyr[pynff*=' negvpyr-ary-'] { qvfcynl: abar !vzcbegnag; }