Juno Perijove 49, March 1, 2023 Options

[volcanopele]

I'm going to choose to be optimistic about PJ49, so with that in mind, I have added previews of JunoCAM's observations of Io for PJ49. Obviously, JunoCAM's real observation plan will likely differ but I added previews for the first and last opportunities to image Io on the pass, a preview of an image nearest closest approach, and one for when Io is near the center of the JIRAM FOV. The observation at closest approach also has the Marduk plume which has a good chance of being observed on this encounter, presuming it is active. The Volund plume might also be visible near the terminator.

The previews use the Voyager/Galileo basemap. The left images were originally projected at the same resolution as JunoCAM but were then enlarged by 5x while the image on the right is the basemap reprojected to 5x the JunoCAM pixel scale.

https://pirlwww.lpl.arizona.edu/~perry/Juno/pj49.htm

[volcanopele]

Okay, I’m not sure that the RED band splotch moves due to time. For example, the same splotch can be seen in a PJ43 image of Io and in the same spot as PJ49. I tried processing the RDR data released to the PDS for PJ43 today and I tried creating a flat using RDR data from PJ43 and the splotch was not in the same spot, about a line up. this is the same as the flat I created from PJ34 data.

Best I can tell, the characteristics of this splotch differ depending on jno:TDI_STAGES_COUNT. The Io images seem to use 2 while most Jupiter images use 1, except for the PJ49 Jupiter images.

If any of you know, maybe Brian?, of any Jupiter images where jno:TDI_STAGES_COUNT=2 and where Jupiter fills the field of view and taken prior to PJ43 so that RDRs are available, please let me know and I can create a flat from them.

[Brian Swift]

Best I can tell, the characteristics of this splotch differ depending on jno:TDI_STAGES_COUNT. The Io images seem to use 2 while most Jupiter images use 1, except for the PJ49 Jupiter images.

If any of you know, maybe Brian?, of any Jupiter images where jno:TDI_STAGES_COUNT=2 and where Jupiter fills the field of view and taken prior to PJ43 so that RDRs are available, please let me know and I can create a flat from them.

Yes, splotches change location in the data as TDI changes.
Unfortunately, when I went looking some time ago, I didn't find a good set of TDI=2 images that covered the full frame from which to produce TDI=2 specific flats. Instead I developed a method to smear my good TDI=1 flats for use at higher TDIs. But it doesn't work very well. 🤷