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Bjorn Jonsson

Björn Jónsson

Björn Jónsson (Iceland) is the developer of the IMG2PNG software, which batch-converts spacecraft image data to PNG format.  His website contains simulated views of other planets produced using image maps generated from space image data; most of his image processing work is posted only within or on this website. (UMSF Moderator: Bjorn Jonsson)

Unless otherwise specified, the work of Jonsson is shared on under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
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Latest Blog Posts

Jupiter's Great Red Spot

Posted 2015/12/07 06:59 CST | 1 comment

On the 20th anniversary of Galileo's orbit insertion around Jupiter, amateur image processor Björn Jónsson shares some of the mission's first images of Jupiter's iconic massive storm.

Mapping Europa

Posted 2015/02/18 01:38 CST | 2 comments

Several global maps have been made of Europa, but amateur image processor Björn Jónsson felt they could be improved—so he decided to make a new one.

Revisiting Uranus with Voyager 2

Posted 2014/12/10 10:44 CST | 2 comments

Amateur image processor Björn Jónsson brings us some new views of Uranus from reprocessed Voyager 2 data.

Older blog posts »

Latest Processed Space Images

Ganymede from Voyager 1

Ganymede from Voyager 1

Posted 2016/05/24 | 0 comments

This 17-frame mosaic of Ganymede is composed of images obtained by Voyager 1 on March 5, 1979 over a period of about 2 hours. During these 2 hours Voyager 1's distance from Ganymede dropped from 305,000 to 180,000 km. The original GBV or OBV color images were used to create synthetic R, G and B color, resulting in approximately true color. In a few small areas only one or two colors were available; these areas were colorized by taking the color from nearby areas.

Jupiter from Voyager 2

Jupiter from Voyager 2

Posted 2016/01/19 | 0 comments

This is a mosaic of 12 color images obtained by Voyager 2 on July 5, 1979 from a distance of 4.5 million km. The resolution is 45 km/pixel. Each color image was composed from orange and violet images plus synthetic green. The end result is approximately natural color and contrast.

This mosaic shows a number of interesting details. There are fairly irregular filamentary cloud structures in the north polar region, gravity waves at several locations near the equator, brown barges can be seen, big and bright plumes, various small spots and ovals and a turbulent region at lower right that is just west of the Great Red Spot. And perhaps most interesting: Amalthea is visible at lower left (it's very dark).

Gibbous Mimas

Gibbous Mimas

Posted 2016/01/18 | 0 comments

Cassini made its second-closest flyby of Saturn's moon Mimas on January 14, 2016. During this flyby, Cassini obtained a mosaic of Mimas' trailing hemisphere through several filters. Saturnshine is especially apparent in these images, resulting in beautiful images of a gibbous Mimas where the nightside is also clearly visible. This four-frame mosaic is comprised of images obtained during that flyby at a range of ~40,000 km. North is up and the mosaic is centered near longitude 270°.

More pictures processed by Björn Jónsson »

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