Juno perijove 9, October 24, 2017, near solar conjunction |
Juno perijove 9, October 24, 2017, near solar conjunction |
Nov 3 2017, 12:33 PM
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
It's time to start a new topic for Juno's Perijove-09.
Due to solar conjunction, data downlink is delayed several days, but things appear to look good thus far. Data downlink started on October 31, and if everything continues well, it should be a matter of a few days, at most, until the majority of the raw Perijove-09 images will become available. Due to the incremented available storage for JunoCam, we may get a sufficient coverage to render a pole to pole -- well, almost pole to pole -- fly-over reconstruction, despite the difficult communication near solar conjunction. I'll have a try at least, over the next few weeks. |
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Dec 15 2017, 12:06 PM
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
In order to remove most of the greenish cast, I've been using 0.88 for red since PJ-06 for enhanced images. But this might undergo another refinement later.
In general, I'm not sure, whether there is a fixed "how to". It depends on your purpose. I've written almost 10 MB of code for various purposes of JunoCam image processing and related tasks, almost everything from scratch. Might be the code could be shortened to 5 MB with sufficient effort in "refactoring", but I've still a long list of TBDs after four years of development. I might double the code next year in order to cover some of the items on the (ambitious) list. I'm interested in developing and understanding all technical detail about camera calibration, processing, data reduction, evaluation, and beyond, independent of possibly existing partial solutions, but that's probably not the recommended way for people, who just like to create beautiful images, nor for professionals who need to reduce specific project costs and risks. The semantics of the code overlaps with that of NAIF/SPICE and ISIS3. So, if you are happy with "the standard", you might consider to base your work on these libraries and tool sets. The JunoCam extension for ISIS3 is work in progress since quite a while, and might be released next year, for those who are used to work with ISIS3 in a UNIX environment. Regarding threads, I guess, that Candy would be happy to learn about possible extensions of the missionjuno website. One of her primary objectives is "Science in a Fishbowl", as far as that's possible without running into science publication or privacy issues. "Evaluating JunoCam images with ISIS3" might become one of the considered topics. |
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Dec 15 2017, 05:56 PM
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Newbie Group: Members Posts: 2 Joined: 13-November 17 Member No.: 8284 |
The code I developed was for a computational photography course, so for a variety of reasons I used only related methods. So I only did 2d alignment methods to register the framelets, which turned out OK but obviously was not perfect. It seemed like I would just be able to find the homographies for perfect framelet alignment but I wasn't able to get acceptable/consistent results doing it. I was hoping to be able to open source the code for people to play around with but I need to check guidelines related to the class first.
The Juno Software Interface Specification document says they perform a white balancing such that a white surface has a value of 10000. (For planetary targets). I did not attempt to implement this. I was thinking that a thread that could summarize information about the spacecraft and specifically the instruments (including junocam) would be useful. It could encompass "official" pipelines as well as unofficial ones by giving enough data to help people implement it themselves or modify existing code. For example, originally I wanted to try to visualize data from JIRAM or MWR and merge them with junocam imagery. I have a list of links to a variety of documents and posts that could be helpful to start. Also, were the flat fields ever released? I found mention of them in the calibration report but could never actually find them. |
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