MOM At Mars, Mission Operations Options

[nprev]

Successful insertion!!!!! Congratulations to ISRO!!!!

[wildespace]

A quick Photoshop levels adjustment, using "Enhance Per Channel Contrast" with "Snap Neutral Midtones" box checked:



I think this has resulted in colours very close to the colours of the surface as we have seen from raw Mastcam and MAHLI images.

I remember reading in a few places that the pronouncedly red appearance of Mars when photographed from outside of its atmoshere is due to all the dust suspended in its atmosphere.

[fredk]

I think this has resulted in colours very close to the colours of the surface as we have seen from raw Mastcam and MAHLI images.

I remember reading in a few places that the pronouncedly red appearance of Mars when photographed from outside of its atmoshere is due to all the dust suspended in its atmosphere.

Mastcam cameras have a well-known "greenish cast" making the surface look yellowish.

If atmospheric dust reddened the planet, then the limbs should be redder than the centre of the disc, since you look through more dusty air near the limbs. Also the planet should look redder during global duststorms, but I haven't heard of a hue shift during duststorms.

[4throck]

The surface color seen from space suffers the effect of the atmosphere 2 times. Light must come down and then back up.
So any hue will be magnified on full disk images, more so if there's dust or anything that absorbs / reflects light.

The Red Mars from orbit is an accurate rendition of what you would see, the same way as astronauts see the Earth as a blue planet.
If really doesn't compare to what it looks like on the ground .

The limbs are also complicated because you have phase angle there. One thing is reflected light, another absorbed light, just to keep things simple. But you really have to take into account scatting, diffraction, etc, etc. Really not that simple.
And on Mars you have limb hazes and clouds, so a bluish color is to be expected there.

All this meaning that the MOM image is just fine.