Juno, perijove 12, April 1, 2018 |
Juno, perijove 12, April 1, 2018 |
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Junior Member ![]() ![]() Group: Members Posts: 71 Joined: 12-December 16 Member No.: 8089 ![]() |
So, according to the voting page, apparently the spacecraft's being spun around to get the instruments pointed directly at the planet. Io and Ganymede will also be imaged during this pass, as they'll come into view of JunoCam two hours before and twelve hours after closest approach, respectively. For Io, the team are "planning to take two pictures - one exposed nominally and one that over-exposes Io to look for volcanic plumes extending above the surface." The Great Red Spot is also expected to come into view during the spacecraft's departure.
Here's a logo for Perijove 12 I threw together, by the way. ![]() |
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#2
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 ![]() |
Thanks!
The displacement field derived by stereo correlation, and smoothed by a bandpass filter represents a numerical description of a vector field, such that numerical integration methods for differential equations can be applied, especially solutions of the initial value problem. A morph is essentially such a solution applied to a set of initial values. At this level of elaboration, the displacement field is just a vector field of pixel displacements, i.e., the displacement is a function of pixel position, however not yet of an immediate physical meaning due to the neglected projection between image coordinates and physically more meaningful coordinates. The differential equations are also only given numerically and implicitely in terms of displacement fields, although some of the derived entities are related to the Navier-Stokes equations. Especially, I've made some experiments with the Lamb vector and its first derivative, in order to get an idea, whether a verification of the Navier-Stokes equations might be feasible, or where the velocity field is consistent with the assumption to be irrotational. Like Anita has written, those are feasibility tests that give a qualtitative idea, not yet final physically calibrated and fully interpreted results. |
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