Perijove 11

By Glenn on 2018-02-07 UT

Unlike previous perijoves (PJ1, PJ2-PJ10), JunoCam did not obtain down-track images of Jupiter.   For example, there will be little or no overlap between JunoCam and Microwave Radiometer (MWR) results except possibly at high northern latitudes.   Nonetheless, these oblique views of Jupiter's atmosphere are likely to be just as interesting as previous perijoves.


  1. comment by Philosophia-47 on 2018-02-26 23:38 UT

    A report on 'JunoCam at Perijove-11 (2018 Feb.7):  What the pictures show'

    has been posted on the BAA Jupiter Section web site at:

    The report is downloadable as a PDF with mini-figures, and the full-size figures are downloadable as a ZIP file.

    This time the camera did not catch any major known features close up, but it continues to reveal interesting and beautiful aspects of the cloud textures.  The outbound images yielded a complete map of the southern hemisphere including the STB Ghost outbreak near oval BA, and the S. Tropical Disturbance enveloping the GRS.

  2. comment by Maquet-80 on 2018-02-12 16:46 UT

    Perijove-11 maps, part 1, illumination-adjusted and linearized (gamma=1), are online:

    This way of rendering is better-suited for analysis of features near the terminator than the enhanced version with gamma=4.

  3. comment by Maquet-80 on 2018-02-12 00:04 UT

    A first set of map renditions of PJ11, part 1, RGB, is online:

    These maps are approximately illumination adjusted, and enhanced with gamma=4 with respect to radiometric values.

    A second run of the same set, with gamma=1 is planned. While an enhancement with gamma=4 results in a good contrast, gamma=1 shows features better that are close to the terminator.

    During PJ-11, only a portion of Jupiter's northern illuminated hemisphere has been visible for JunoCam.

    For Jupiter's southern hemisphere, a better coverage is to be expected.

    "Small" white clouds are visible on reprojected images, and suggest, that rendering large cylindrical maps for these areas makes sense, in order to simplify size measurements. I'm considering to render such large cropped cylindrical maps next week. Additional enhancement may turn out to be required to make some of the clouds of altocumulus appearence obvious.

    A rather large bright cloud near the center of a northern FFR appears obvious.