New Mars Forums

Official discussion forum of The Mars Society and MarsNews.com

You are not logged in.

Announcement

Announcement: This forum is accepting new registrations via email. Please see Recruiting Topic for additional information. Write newmarsmember[at_symbol]gmail.com.

#26 Re: Unmanned probes » Cassini-Huygens - Cassini-Huygens Discussion » 2004-07-01 20:22:44

No problem. It was a very informative article and I'm glad they addressed the color photo issue. I knew that in order to get a color photo it involved taking shots with different filters, but I completely forgot that the craft was traveling at such a high velocity that changing filters would be impractical. Silly me.  tongue

#27 Re: Unmanned probes » Cassini-Huygens - Cassini-Huygens Discussion » 2004-07-01 15:41:29

I've got some information on the color photos! Apparently, there will not be any from the OI.

Because of Cassini's enormous velocity - 60,000 mph or so at engine cutoff - its cameras were programmed with shutter speeds of five thousandths of a second to prevent blurring. In the minute required to snap a picture, record the data and be ready for another shot, Cassini moved hundreds of miles, preventing researchers from taking overlapping photos or the multiple images required for color.

http://www.spaceflightnow.com/cassini/0 … Scientists Marvel at Cassini Photos

#28 Re: Planetary transportation » Plans for mobile base - on the moon... » 2004-07-01 15:15:38

I think that NASA should start working on designs for permanent bases, rather than these mobile technical monstrosities.

#29 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 14:48:32

They don't call me the 'King of Sarcasm' for nothing. Actually, they don't call me that at all - I call myself that  big_smile.

But, you know, Clark, maybe you are the hobo...posting via laptop outside of some unsuspecting Starbucks...

And, who is Neal Stephenson and why would he be on their payroll?

#31 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 14:38:28

Wow, Clark. Wow. You continue to amaze me. I wonder how far along Bezos is with hardware development? He would be doing us all a great favor if he just updated his website..

#32 Re: Unmanned probes » HDTV mission footage » 2004-07-01 14:32:26

Of course it will be catered! Only the finest freeze dried food available and as for the the steak-in-a-tube, all I can say is dee-licious!

#33 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 14:30:12

So that's the source of your information. I knew it! You're a fake!  smile

#34 Re: Unmanned probes » HDTV mission footage » 2004-07-01 14:24:17

Send people? I'm available. How about you guys?

#35 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 14:22:09

Speaking of people with an overabundance of money, what's up with Amazon.com's Jeff Bezos and his new company http://www.blueorigin.com]Blue Origin? It's been very hush-hush. And when I say hush-hush, I mean there is absolutely NOTHING known about what he's doing. Is it an SSTO, an X-Prize competitor, what? Anyone care to speculate?

#36 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 14:11:57

Hey, if a nut job can get us cruising to the moon in style, then I'm all for it!

Thanks for the links. If this doesn't pan out, like the majority of ideas in the nascent space industry, I am going to be very upset. But as you said, he has LOTS of money, and actual "Transhab" hardware.

#37 Re: Unmanned probes » HDTV mission footage » 2004-07-01 14:05:25

It's funny that you should mention the webcam. After I posted questioning our lack of HD footage, I immediately thought of a webcam and asked, "wouldn't any footage be better than none? - which is what we currently have.

Maybe NASA could include something similar to the http://www.eclipticenterprises.com/prod … ]RocketCam that was mounted to the side of Space Shuttle and the MER rockets during their launches a year or so back. It transmitted nearly all the way to orbit. It couldn't be that difficult to store and transmit at a later time...

#38 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 13:57:42

No problem, Rxke. I remember reading that a while ago and getting really excited. I had no idea that development was so far along!

I can't tell whether the fourth photo down on that site is a rendering or not. If not, I wonder if it's actual working hardware, or just a mockup?

Clark, where did you hear about his goal to build a cruise ship? That sounds very interesting. Maybe there is in fact a new space race, but this time between the private sector and the US Govt.

#39 Re: Unmanned probes » HDTV mission footage » 2004-07-01 13:49:46

Cobra,

Another concern is light. HD on Mars is fine. HD around Saturn gets much more iffy. With such low lighting levels there's really only two ways to compensate, use long 'exposure' times or boost the gain of the camera. One blurs images, the other makes them grainy. Either could negate the entire point of sending HD cameras in the first place. Bad video looks bad, but bad video in HD is atrocious.

Light with a digital image sensor, like on those small handheld HD cams you mention, is even more of an issue. As exposure times increase, there is heavy image degradation, especially with those 'hot spots' that timed exposures on consumer digital still cameras produce...

As for bandwidth, I recall hearing about a laser communication system under development for future Mars orbiters and possibly JIMO. It's under consideration for JIMO primarily because of its high power requirements, since JIMO will be powered by a fission reactor. Does anyone know anything about the bandwidth of such a comm. system?

#40 Re: Unmanned probes » HDTV mission footage » 2004-07-01 13:46:19

Yeah, IMAX is 70mm - 35mm is the standard film size. (It's okay, I had to look up the standard film size just now - you gotta love Google).

Given enough resources, we'd have floating O'Neil colonies in orbit AROUND Mars  :;):. We can dream, can't we?

And actually, Cassini started development back in the '80s, so who can really say when they froze the design specifications. It could be running with a chip from 20 years ago! Oh, the horror! In all seriousness, how long does it take to get something 'space approved'? How difficult is it to radiation-harden something and given NASA's new mission, shouldn't getting advanced, reliable computer systems on the spacecraft be a priority? (I know, Apollo had less computing power than a 4-function calculator)

You know, you've got me thinking about my first computer now. I can remember it like yesterday. It was 25mhz (a 286) with a 5 megabyte hard drive...it ran DOS and :gasp: Windows 3.0! Oh, and the 5.5" floppy - when the disks really were floppy! I'm sure others will cite older systems, but hey, I'm only 19  smile

#41 Re: Unmanned probes » Cassini-Huygens - Cassini-Huygens Discussion » 2004-07-01 12:57:25

Thanks Cindy. I've been a lurker here for a while and today, while bored at work  :;): , I decided to register and start posting.

Even though there aren't any color photos yet, they've been posting a lot of new B&W ones on the site. This side view of the rings is absolutely stunning...

Saturns]http://saturn.jpl.nasa.gov/cgi-bin/gs2.cgi?path=../multimedia/images/rings/images/SOI7.jpg&type=image]Saturn's Sunlit Rings

#42 Re: Unmanned probes » HDTV mission footage » 2004-07-01 12:52:33

Transorbital! Yes! That's the one. But you are definitely correct about it being the most static page. However, the company must hold some water if Hewlett-Packard is investing in it - see http://www.hp.com/hpinfo/newsroom/press … 5a.html]HP iPAQ Pocket PCs to be Onboard TransOrbital's First Commercial Moon Mission

As for the IMAX camera, a digital HD cam and IMAX camera are different beasts all together. The IMAX camera uses very large film stock, whereas a digital HD cam would use solid state storage. So, the size for HD could be considerably smaller than IMAX. Granted, as you mentioned, storage and power (electrical and computational) are still issues to overcome, but I am sure that given enough resources... smile

#43 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 12:41:12

Here's that article mentioned in my above post:
http://www.klas-tv.com/Global/story.asp … v=168XDWn7

"The Bigelow Aerospace company has signed an agreement with NASA. . ."

and...

Is it accurate to say that NASA is putting all of its eggs into the Bigelow basket?

"In a way, it is. It has given up on its own habitat program and has turned over its patents to Bigelow Aerospace alone. Other private companies are working on launch vehicles and return vehicles. But this is the only company working on inflatable habitat, so there is a lot riding on the work underway just down the road. . ."

#44 Re: Human missions » Post central for information on CEV - iformation station for the spacecraft » 2004-07-01 12:34:45

If Bigelow provides these inflatable structures to NASA, which I assume they will (as they are superior to the tin-can habitat designs in weight, size, and strength) then it looks as if the commerical aspect of the new space vision is shaping up very nicely.  I also seem to remember reading an article somewhere saying that Bigelow actually already HAD a contract to supply these to NASA..but I don't recall where I saw it.

If the owner of a hotel chain can supply NASA with hardware, then anyone can! This definitely is a step in the right direction. Now, if only Mr. Hilton would start investing in that Lunar Hotel...

#45 Re: Unmanned probes » Cassini-Huygens - Cassini-Huygens Discussion » 2004-07-01 11:54:10

I wonder if they took any color photos during orbital insertion. . . these I would love to see!

#46 Re: Unmanned probes » HDTV mission footage » 2004-07-01 11:17:28

Recent probes such as the MERs and Cassini have returned some breathtaking imagery from the surface and orbit of other worlds and the public is eating it up. NASA's Mars websites have been inundated with people and I'm sure the returns from Cassini will be just as popular. However, with recent advances in compression such as MPEG-4 and H.264 (http://www.apple.com/macosx/tiger/h264.html) and solid-state storage technologies, when will someone have the sense to include a high definition video camera on one of these missions? I am aware that these missions have tight bandwidth and weight requirements, but the truth of the matter is that the public does not get excited by data sets. People get excited by multimedia.

At the recent Aldridge Commission hearings, many people testified that in order for the new Vision to work, the American public needs to own it. They need to be excited by it. I'm sorry to say that in a world of DVDs and HDTV broadcasts, the low quality video currently seen sent down from the ISS on occasion (the recent spacewalk, etc.) is not good enough. How compelling do you think high-quality footage of orbital insertion or landing would be? How amazing would it be to see a human set foot on the surface of the Moon or Mars at a resolution of 1920 x 1080 pixels? This footage could be used directly for so many purposes - science museums, documentaries, Hollywood productions. Of course, it would be expensive to design custom hardware for such a purpose, but I believe the benefits to public perception would far outweigh the associated costs and technical difficulties. Remember the deal NASA had with Dreamtime a few years back, before the company went under? Is anyone aware of similar arrangements at the present time?

Thoughts?

(Also, what ever happened to that lunar lander, for the life of me I can't remember the name or company, that was supposed to return HD footage from the lunars surface?)

Board footer

Powered by FluxBB