Juno perijoves 2 and 3, October 19 and December 11, 2016 |
Juno perijoves 2 and 3, October 19 and December 11, 2016 |
Oct 26 2016, 04:44 PM
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#1
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Junior Member Group: Members Posts: 23 Joined: 13-October 13 Member No.: 7013 |
A lot has happened and it seemed like a good time to start a new post. We will be staying in 53 day orbits until the project has a full understanding of the risks that may or may not be associated with reducing the orbit period to 14 days per our previous plan.
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Dec 16 2016, 05:28 PM
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#2
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
That's an enhanced crop of an intermediate map product derived from PJ3 image #092:
I'm experimenting with raw image #092 to find sw glitches. I had a bug in the calculations of the rotation matrix needed to transform between Jupiter and JunoCam frame for a given instant, which distorted the map away from a proper lon/lat frame. A small error in a fairly complex calculation. But it's sufficient, that you don't get what you intend. I'm now presuming, that the residual non-flat brightness of my de-lamberted map products can partly be attributed to some mixing of planetocentric and planetographic code. The surface normal for de-Lamberting needs to be calculated planetographically while the map projection is planetocentric. Of course one could work with the NAIF or ISIS3 libraries, but you learn more by going through all the technical challenges, and at some point you can't go beyond "the standard" without taking the risk to understand and do it yourself. |
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