astroflask

4 ms·

1.
by astroflask 5y ago
Yes, I just explore these archives as a hobby and sometimes do a bit of amateur processing on the files. There tends to be some embargo period (a few months to a couple of years) where only the mission team has access to the data, and they
2.
by astroflask 5y ago
Gonna chime in here to comment that most NASA missions (and ESA too) provide the scientific data for download free of charge, under Public Domain or CC licenses. If it's for scientific purposes, it's not just good manners, but rat
3.
by astroflask 5y ago
Tried to follow the inpainting algorithm link in the page but it's dead. Looks like this[0] would be the paper. [0] https://www.researchgate.net/publication/220720382_Image_inp...
4.
by astroflask 5y ago
For sufficiently dim targets, you absolutely need minutes long exposure. If you go for shorter bursts, you face two main challenges: 1) Not enough photons reach the sensor to distinguish the object you are trying to photograph from the nois
5.
by astroflask 5y ago
And also things that have gone to Mars in the past have blasted off chunks of Mars into Earth.
6.
by astroflask 5y ago
Changing orbital plane requires delta V, and the Shuttle had barely enough to make it to LEO (the highest it ever went was servicing the Hubble). Cargo capacity... Not that much really, since you're carrying yourself a whole lot of orb
7.
by astroflask 5y ago
For SLS a group looked into making boosters powered by modernized F-1's... Turns out a lot of knowledge about welding them had been lost. They managed to get an old unflown F-1A to work, but it's a bit unclear how much they manage
8.
by astroflask 5y ago
Right, that's the impression I got from reading. And it looks like we have regained that technology, which is what threw me off the remark. Will take a look at that paper, however I'm totally a stranger to most geo-something scien
9.
by astroflask 5y ago
> What's the point of the Space Shuttle if launches were more expensive than disposable rockets? What's the point of the Buran, if the Soviets didn't feel like they need an answer to the space shuttle "just in case&qu
10.
by astroflask 5y ago
> In our unfortunately light polluted night sky we can barely see the stars, but shouldn't the astronauts see the earth within a shimmer of billion stars? No, you have to be in the night side, or looking into the void (no Earth surf
11.
by astroflask 5y ago
From the lengthy blog post under the images, it'd seem he used those archives. I have the impression that I've seen these pictures as TIF files instead of JPGs somewhere (the Internet Archive perhaps?), but I can't remember p
12.
by astroflask 5y ago
Okay, I came here to talk about how the images are a bit soft and a quick, subtle pass of Richardson-Lucy deconvolution restores some detail (and enhances the film grain, that's a plus for me but some people may find it a bit too much
13.
by astroflask 6y ago
In theory the shuttle promised sustainability. But as the years went by it proved to be more expensive and almost 5x deadlier than the Apollo stack. The shuttle did make sense for some things it was never used (DoD influence there) and it w
14.
by astroflask 6y ago
Yes, but the (dwarf) planet would then need some mechanism to keep the internal temperatures up, for example Europa and Enceladus have massive planets that keep their interiors warm with tidal forces, or the Pluto-Charon (practically binary
15.
by astroflask 6y ago
One of Curiosity's cameras has a Bayer Filter Array and practically shoots like a DSLR. You can download the (debayered) "raw" files which are simply 1408x1200x1 (channel, uint8) panes one under the other in RGB order. So bas
16.
by astroflask 6y ago
Totally agree that "The Martian" would never happen in real life. Still, as other have pointed out, there are dust devils and "strong" winds.
17.
by astroflask 6y ago
The creator on that channel simply uses a DAIN application without pre or post processing the images (either the base images or the optical flow maps). I take a different approach and I can't say I haven't found issues (I have, ma
18.
by astroflask 6y ago
The movement shown in this video[0] happened over the span of a martian day. Do not dismiss the winds of Mars, as they have also killed[1] a couple of rovers already. [0] https://youtu.be/k7pfdFMVj-o [1] They have also brea
19.
by astroflask 6y ago
Some of the bashing is because of the over-the-top narration, and the script saying things that are borderline lies. It's not the first time this images have been seen. It's not the first time someone has rendered them in 4K video
20.
by astroflask 6y ago
Earlier this year I made a video[0] where I took two images which are frequently posted on reddit that show the movement of martian sand over a day and interpolated (with python and opencv) the movement into a smooth video. I'm current