I love that they opted for color cameras. Not much color to be seen, but the flares, together with the motion blur (while falling and hopping!) make the pictures look really dynamic. :)
i wish they had better cameras though
Hayabusa 2 rovers send new images from Ryugu surface
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Re: Hayabusa 2 rovers send new images from Ryugu surface
#52I love that they opted for color cameras. Not much color to be seen, but the flares, together with the motion blur (while falling and hopping!) make the pictures look really dynamic. :)
I'm not entirely sure that's motion blur. The images shown in the article make it look like it's just lens distortion. It's probably a fairly wide angle lens, and that's why things look stretched out the further from the center of the image they are. (I think.)
Some of it definitely is, they even mention it here:
http://www.hayabusa2.jaxa.jp/en/topics/20180922e/
Re: Hayabusa 2 rovers send new images from Ryugu surface
#53I love that they opted for color cameras. Not much color to be seen, but the flares, together with the motion blur (while falling and hopping!) make the pictures look really dynamic. :)
Wonder if it's because they were planning on taking pictures while hopping? The usual one-picture-per-color-filter method that they usually use on space probes probably wouldn't work well while in relatively fast motion.
They did, see my other post. I don't know about the filters though, I'm not deep in the material, I also only know what they posted on twitter :P
Re: Hayabusa 2 rovers send new images from Ryugu surface
#54Considering their very tiny size, I'm curious about three things... What sort of software/watchdog timer these mini rovers have set up for charging their batteries, the size and type of the batteries (in Wh, chemistry, etc), and how often they wake up and take photos and temperature measurements.
The size of the surface area exposed to the sun with high-efficiency PV cells is not very large, since they are so tiny. I'm assuming the cells are triple-junction GaAs for the greatest Wh per square cm per day.
Re: Hayabusa 2 rovers send new images from Ryugu surface
#55I love that they opted for color cameras. Not much color to be seen, but the flares, together with the motion blur (while falling and hopping!) make the pictures look really dynamic. :)
i wish they had better cameras though
This was my question - they are the size of like 6 iPhones stacked together. Seems like they should look at least as good as the selfie cameras in your average smartphone.
Re: Hayabusa 2 rovers send new images from Ryugu surface
#56Earlier quoted context omitted.
Movement along the surface via friction (wheels, crawling, snaking etc) is not considered feasible. The surface is probably too loose to provide much traction, but more importantly the low gravity means the vehicle will certainly become caked in dust very quickly. Hopping means you don't disturb the surface, and if you do you probably fly clear of the resulting dust cloud.
Makes sense. Now that yoo bring up dust, how does erosion occur in space, or how would dust form other than perhaps through temperature fluctuations?
Dirty snowball + heat = dirt. Small bits once locked in ice are now dust.
Re: Hayabusa 2 rovers send new images from Ryugu surface
#57Earlier quoted context omitted.
> since it doesn’t have any significant value in the field of astronomy. PR has some value: more people will want to try and join the field and more funding could be secured.
NASA is not allowed PR as a federal agency. Imagine how far ads, sponsoring games/events, etc, would get NASA in terms of PR. Compare that to the military: https://www.cheatsheet.com/money-career/amount-money-militar... https://taskandpurpose.com/us-military-combat-trainer-kick-a... Not only that, NASA's education department was as close to PR as we had and... https://www.forbes.com/sites/startswithabang/2017/05/25/t…
On the flip side, Brindenstine has discussed selling ad space on the sides of rockets and naming rights to missions. One concern (out of many) is ensuring that the money goes to NASA, and not just the treasury's general fund
Re: Hayabusa 2 rovers send new images from Ryugu surface
#58Earlier quoted context omitted.
i wish they had better cameras though
This was my question - they are the size of like 6 iPhones stacked together. Seems like they should look at least as good as the selfie cameras in your average smartphone.
Reading this sub-thread, it makes me wonder how a consumer level smartphone camera would perform in space... I was under the assumption that they might have a limited operating temperature range, and that they might have issues in the extreme cold?
Re: Hayabusa 2 rovers send new images from Ryugu surface
#59Earlier quoted context omitted.
> since it doesn’t have any significant value in the field of astronomy. PR has some value: more people will want to try and join the field and more funding could be secured.
NASA is not allowed PR as a federal agency. Imagine how far ads, sponsoring games/events, etc, would get NASA in terms of PR. Compare that to the military: https://www.cheatsheet.com/money-career/amount-money-militar... https://taskandpurpose.com/us-military-combat-trainer-kick-a... Not only that, NASA's education department was as close to PR as we had and... https://www.forbes.com/sites/startswithabang/2017/05/25/t…
That's completely false. NASA has a very large PR (public affairs) team, 114 employees in 2016. NASA also spends about ~4 million a year with external advertising and PR agencies.
https://www.gao.gov/products/GAO-17-711?source=ra
Also, the NASA budget ended up getting a big increase, and the education budget was not cut:
https://www.sciencemag.org/news/2018/03/planetary-science-wi...
Re: Hayabusa 2 rovers send new images from Ryugu surface
#60Stupid question: why does these images look so low res and over/under exposed. Sometime I feel iPhone camera tend to do much better job than those million dollar cameras on these missions. I am obviously missing some key details.