celoyd

6 ms·

1.
by celoyd 11y ago
Done. Thank you!
2.
by celoyd 11y ago
It’s based on the example for 2-pass encoding, with tweaks for things like QuickTime support: https://gist.github.com/celoyd/90cc919105248a2ddc95
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by celoyd 11y ago
I know it’s odd, but I wanted it not to be visible all at once.
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by celoyd 11y ago
Oh, hello! I enjoyed your motion interpolation experiments, and I look forward to the blog post.
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by celoyd 11y ago
Is there a good public reasonably live feed of this data? Right here: http://himawari8.nict.go.jp
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by celoyd 11y ago
Also, it'd be nice to be able to pause it and really take in the colors. You can zoom in on the NICT browser: http://himawari8.nict.go.jp Their color mix is more cloud-oriented, so it’s darker, but at least the image qual
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by celoyd 11y ago
Sorry. If there’s one thing I’ve learned from this project, it’s that video support is hard. I’m happy to take advice (preferably in the form of ffmpeg flags).
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by celoyd 11y ago
Well-worn gray: https://en.wikipedia.org/wiki/Albedo It’s a loose comparison, since both asphalt and the moon’s surface vary. Plus, there are tricky things like specular reflection and the opposition effect. How can i
9.
by celoyd 11y ago
Casual readers may not get your reference – the idea for DSCOVR literally came to Al Gore in a dream. I still think this is hilarious. One can indeed argue that DSCOVR has merit, and people including climate scientists do. (Though arguably
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by celoyd 11y ago
I think they’re just responding to my joke with a joke ;)
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by celoyd 11y ago
I made this, and I’m happy to answer questions. (And to politely ignore contentious remarks about how I characterized GOES-R.)
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by celoyd 11y ago
Discovery at Udvar-Hazy is why I started this project. I saw the serial numbers on the tiles – almost close enough to touch on tiptoe – and remembered reading about some kind of database. I imagined a visualization with a line for every ti
13.
by celoyd 11y ago
How odd. I just switched fonts entirely (though still from Google Fonts). If anyone has a sense of what’s going on here, I’d love to fix it properly.
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by celoyd 11y ago
> The environmentalist threw a fit about this "glue" and it was replaced with a glue that all the engineers said was not as safe, in regards to the tiles staying attached... This is a common myth. It’s false: http://
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by celoyd 11y ago
Fixed (I hope). Thanks for reporting.
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by celoyd 12y ago
In the images in the blog post and the live map? Those aren’t pansharpened at all. If we do add pansharpening in a later version, it’ll likely be naïve, without spatially aware modeling of the multispectral data. (Specifically, it’ll probab
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by celoyd 12y ago
I wrote that Mapbox post, and helped with some of the processing that happens to get this data on AWS. Yep, you get multispectral resolution of 30 m, and with pansharpening ( http://en.wikipedia.org/wiki/Pansharpened_i
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by celoyd 12y ago
it could be in the order of magnitude of 1.8cm per year at some places of Antartica and Canada. Here’s a visualization of elevation over time recorded by a GPS observatory at Baker Lake, Nunavut, relatively near the fastest modeled reboun
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by celoyd 13y ago
And the third microsat company with operations coming online soon is Planet Labs: http://www.planet-labs.com Robinson Meyer at “The Atlantic” did a nice overview two months ago: http://www.theatlantic.com/technol
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by celoyd 13y ago
The video field of view is 1.1 by 2 km: http://skybox.com/uploads/10/08/imageryandvideospecsheet.pdf Purely speculating, not going on anything they’ve said: theoretically when they have more satellites you
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by celoyd 13y ago
Exactly. This is why distant city lights often twinkle even more than stars do: there’s more atmosphere between you and them than between you and the stars. Another effect here is that Skybox’s video uses the pan band, which includes infrar
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by celoyd 13y ago
I took a break from dealing with an in-band null problem in image data to check HN, and here’s this. Oof. Don’t represent missing data with a value in the same domain as real data. Maybe I’m just grumpy, but that seems like a clear, persu
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by celoyd 13y ago
I’ve worked with NASA and USGS a fair deal both for fun and professionally, and this is typical. They are extremely competent and sincerely want you to have good data. They are also hampered by the bureaucratic limits of any large organizat
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by celoyd 13y ago
I’d be interested to know the ratio of the L0 data size to the L2/3/4 data[0] size – in other words, how many downlinked bits of sensor readout are processed per bit of useful science data? Of course that won’t be a hard number; I
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by celoyd 13y ago
Yet until a credible leadership figure actually _offered_ unconditional surrender, it was going to be war as usual. But it wasn’t. The A-bombs were quite unusual. They were extraordinary weapons, and would have required extraordinary just
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by celoyd 13y ago
a clever, possibly elegant, algorithm It’s just barely clever enough that no one thought of it before. It has to be really simple, because the innermost loop (estimating how cloudy a given pixel is) runs several trillion times. using too
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by celoyd 13y ago
Heh, yes, we seriously considered the Honda Civic full of external drives option.[0] Some of our images were from NASA’s hot new GIBS[1] service, which was extremely fast. However, it’d only backfilled about 2/5 of the data we needed, so fo
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by celoyd 13y ago
Blue Marble was a big inspiration here, and we’ve had fun comparing notes with some of the people who made it. Blue Marble is, however, ten years old, and has a number of (justifiable) limitations. You can get a sense of these if you zoom i
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by celoyd 13y ago
This release is down to zoom level 8, which is roughly 500 m to 1 km/px – what I think of as regional rather than local . You’re seeing mountain ranges and river valleys, not what you have planted in your garden. Right now with this proj
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by celoyd 13y ago
Oh, oh, I like doing these analogies, and we badly need AWS stickers for the office. A typical grain of beach sand – which must be about the lightest solid thing that’s easy for most people to envision – is 3 mg. That many grains of sand wo

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