Rosetta Mars Options

[ugordan]

Thanks, machi. Here's another one with Phobos:



I like the quality of the NAC images. Too bad most of the stuff from Mars and Earth flyby 2 is overexposed and unusable.

[machi]

I think, that it's similar situation as in case of the Stardust' Tempel 1 images. Mars and Earth data from Rosetta are not officially released...

I was wrong, evidently Mars and Earth (two flybys) data are oficially released - http://pdssbn.astro.umd.edu/data_sb/missio...tta/index.shtml
But still we must wait for data from the lander.

[john_s]

Thanks, machi. Here's another one with Phobos:

I love the details in the clouds along the northern terminator in that one...

John

[Phil Stooke]

Yes, the clouds are exquisite! Good work everybody.

Phil

[tedstryk]

Here is a pretty one.



Also, the Phobos images are conjuring memories of 1969.

[Phil Stooke]

Very nice, Ted, as usual... but flipped E-W (as you probably knew)

Phil

[Stu]

Bit late to the party...

[tedstryk]

Very nice, Ted, as usual... but flipped E-W (as you probably knew)

Phil

I realized it when I saw it next to the Mariner-7 Phobos over Mars image. Oops.

[djellison]

Are we (apart from UG) using img2png? I'm getting a combo of very very dark moon images from the Earth flybys, but full pixels in some of the Mars images.


D

[elakdawalla]

I'm using IMG2PNG, and getting nice results. What do you mean by full pixels?

Here's my take on the inbound global shot.

Attached thumbnail(s)

 

[djellison]

Saturated white pixels - meaning I can't make a shot like that one, as the polar cap is bleached out.

Did you just do img2png.exe *.img - or did you use any tags on the end?

D

[elakdawalla]

Nope, just vanilla IMG2PNG, no switches at the command line. Have you downloaded a new version recently? Bjorn makes adjustments every time a new data set comes out that I can't open with IMG2PNG I'm pretty sure he modified it when the Steins data came out.

[djellison]

I'll have another hack it it tonight, see what happens.

[Bjorn Jonsson]

I haven't modified IMG2PNG for Rosetta yet - actually I was waiting for the Mars flyby data to appear. The problem is probably that when converting the floating point (level 3) images, IMG2PNG 'knows' nothing about the data so it uses the actual data range to map the floating point values to 0-65535 (the mininum floating point value is usually set to ~0 though). This is bad if there are bright specks in the images and makes them dark. Another problem is that different filters (or more accurate - images) get stretched differently. I need to upgrade IMG2PNG to 'know' the Osiris data. I may do it this weekend or possibly earlier.

Interestingly, the Messenger data is somewhat comparable to the Osiris level 3 data since it contains floating point data. The important difference is that IMG2PNG should know how to handle the Messenger stuff.

And by the way this is clearly a beautiful dataset - I get the impression that these are the best global views ever of Mars, at least if you only count framing cameras.

[djellison]

AHHhh - I was using Level 3. I'll try again with l2 tonight.

D