NASA spent $79 Million on LCROSS mission!, page 1
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reply posted on 11-10-2009 @ 12:06 AM by Eurisko2012
reply to post by wx4caster



Could a large rover on the south pole shoot back a signal to Earth
24 hours a day?
Line of sight ?
Who needs water? Can't we just take it with us?
With automation for the mining operation only 5
people could run the whole operation.
Give them 2 large tanks of water and just resupply them.
- 5,000 Fiji Water Bottles -


reply posted on 11-10-2009 @ 10:07 AM by ngchunter
reply to post by Flighty



How are you going to download your "decent digital camera" in realtime with a ping of 2600 and only 2-3 minutes before everything about your spacecraft is reduced to confetti? With my digital camera, they would have had to use every last ounce of bandwidth to download 1-2 images at full resolution before the spacecraft crashed. And that leaves no room for other science instruments (the important part), telemetry, or other commands.


reply posted on 11-10-2009 @ 10:59 AM by Eurisko2012
reply to post by zombiemann



If we mine Helium 3, won't that pay for the water?
How much is Helium 3 worth?
The moon doesn't have an atmosphere so a parachute won't work.
How do we slow it down?
Car air bags? Bounce......bounce......bounce.....drive the rover out?


reply posted on 11-10-2009 @ 11:01 AM by Flighty
reply to post by ngchunter



Surely 79 Million would buy the technology to make decent images in some way possible though wouldn't it?


reply posted on 11-10-2009 @ 11:07 AM by Eurisko2012
reply to post by jra



The images from my 12 inch Meade telescope would be crystal
clear. - No atmosphere on the moon - No distortion -
I think i could build a rover that would work great for $2 Million.
Maybe I could drive it around?
For life support i could have a cool NASA greenhouse.
Dwarf wheat - strawberries - marijuana?
I'm bringing frozen pizza with me! + Fiji Water Bottles!




reply posted on 11-10-2009 @ 11:11 AM by ngchunter
reply to post by Flighty



79 million is dirt cheap for a mission of this nature. My point is that it may seem simple to you, but getting HD images and video from a probe in an interplanetary orbit is quite complicated. As I stated, bandwidth is a major limitation, and 79 million for the whole mission just isn't enough to cover the big expensive camera you want (which must also be modified to survive launch and the thermal conditions of the probe), which in means big expensive transmitting equipment is required to get the kind of bandwidth you're demanding, which in turn needs even more electrical power, which in turn needs even better thermal control and energy storage, which in turn requires even more payload space as well as extensive evaluation and testing... on and on and on. Just changing that one "simple" thing makes this mission unfeasible as an add-on to fill a little extra payload space left by LRO.

[edit on 11-10-2009 by ngchunter]


reply posted on 11-10-2009 @ 11:24 AM by Eurisko2012
reply to post by ngchunter



Why is bandwidth a problem?
Direct TV works pretty well.
The satellite is 23,000 miles away from Earth.
The moon is only 238,000 miles away.
Maybe we could use a new and improved Direct TV satellite
to act as a relay station.


As a matter of fact, i'm going to need Direct TV if i'm living on
the moon running my Helium 3 mining operation so you better
think of something. I'm not watching Blu-Ray DVD movies all
day!


reply posted on 11-10-2009 @ 11:48 AM by ngchunter
Originally posted by Eurisko2012
reply to
post by ngchunter



Why is bandwidth a problem?
Direct TV works pretty well.

Oh good grief, direct tv is a DEDICATED COMMUNICATIONS SATELLITE. Those things have a mass of about 6000kg. LCROSS had a mass of less than 1000kg. That's a perfect illustration of what I was saying in my last post; getting the kind of bandwidth you're demanding requires much more equipment which is both expensive and heavy. That means LCROSS would require its own rocket if it had a directtv level of equipment.

The satellite is 23,000 miles away from Earth.
The moon is only 238,000 miles away.

Yeah, roughly 10% the distance, that means 90% faster communications are possible.

Maybe we could use a new and improved Direct TV satellite
to act as a relay station.


The problem is not line of sight and signal strength would be unaffected due to the fact that the signal would still have to cover 90% of the distance before being amplified. Worse yet, you're adding an extra multimillion dollar satellite and an extra complication to what was supposed to be a simple add-on mission.

[edit on 11-10-2009 by ngchunter]


reply posted on 11-10-2009 @ 12:08 PM by Eurisko2012
reply to post by ngchunter



You seem to have a lot of information about satellites.
6,000 kg?
Why does it have to be so heavy?
Don't we have the technology to make things smaller and lighter?
Lightweight polyalloys?
Miniaturization?
Have you seen a HD Cam recently?
I think we can bring the costs and weight down if we think about it.
Instead of a dedicated Comm Satellite, how about a small
space station 22,300 miles away that is manned by NASA
personnel? We are going to retire the Space Shuttles soon.
Here is an idea. Think with me.
We launch Discovery. In the payload area we put small booster
rockets. Rendezvous with the ISS.
Attach/install small boosters rockets. Head out to the
small space station 22,000 miles away and dock.
Leave it there and as an emergency escape vehicle for
the NASA personnel.
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