PJ25 image 19: Northern Circumpolar Cyclones (methane filter)

2020-04-05 13:04 UT
Credit : NASA / JPL-Caltech / SwRI / MSSS / Björn Jónsson © cc nc sa
Submitted By : Bjorn_Jonsson
Mission Phase : PERIJOVE 25
Source Image(s) : JNCE_2020048_25M00019_V01

An image processed from the PJ25_19 raw image framelets. This is a methane filter image. Images obtained with this filter can be used to estimated the relative altitudes of clouds. Features that appear bright in this image are high in the atmosphere whereas darker features are located at a lower altitude.

The effects of the variable solar illumination in different parts of the image have been removed but the contrast has not been adjusted. However, the seams between the framelets have been removed (or made less conspicuous) and noise in the image reduced. Compared to the color images, the methane images are quite noisy.