Juno Perijove 17, December 21, 2018 |
Juno Perijove 17, December 21, 2018 |
Dec 24 2018, 08:00 PM
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#1
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
The first batch of images has been pushed to https://www.missionjuno.swri.edu/
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 24 2019, 11:26 AM
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#2
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Thanks! Near closest approach, it's very hard to retrieve any dynamical data. There, we get a mixture of dynamics and parallax. Thus far, I've been able to retrieve meaningful dynamical data from image pairs taken within six minutes, when the geometry between images isn't changing too much. For closest approach with 3,500 km above the cloud tops, the viewing angle is changing by 120 degrees or so within two minutes. I think, that for those images, it's easier to retrive 3D stereo data than dynamics. But usually, those images are too blurred and of low contrast to find significant displacement fields. At least, it's quite a bit harder to analyse them properly. As a rule of thumb, I'd say, that for ususal perijove passes, it's possible to retrieve more or less reliable velocity data outside +/-45 degrees latitude relative to the latitude of closest approach. Since this closest approach is shifting northward with each PJ pass, the quality of the data for an analysis of the southern hemisphere, including the latitude range of the GRS is improving. But I'm not yet quite at the very limit of processing the images. So, it might be possible to extend the analysis of the dynamics a little further towards the point of closest approach. I'll continue to try.
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