Third HSRC Release!, Includes map-projected calibrated images Options

[jaywee]

ESA released new set of HRSC images from orbits 1225 and 1863, which are map projected and radiometrically calibrated. At this moment you have to get them through the PSA interface

A color composite of a stripe of Meridiani Planum (includes Victoria) can be found here (2MB)

[dilo]

A color composite of a stripe of Meridiani Planum (includes Victoria) can be found here (2MB)

In fact, this is a 90deg rotated analglyph ( )... I'm not able to identify Victoria, even though there are many simil-Victoria crates... could you kindly show me where should be?

[jaywee]

Actually, it's just simple color composite - exactly same as in Oppy subforum. I know the color doesn't feel right somehow but it's not rotated. Look for the 3 big lined craters on the right about 3/4 down the image. Then in the lighter "rectangle" left of the topmost crater, is Victoria. Pixelwise it's [1180;15588] Or look at the Victoria crop for context

[dilo]

Perhaps not intentional, but channel shift around this crater (located at 1/5th of image height) is really 3D if rotated 90deg clockwise and seen through 3D glasses

Attached thumbnail(s)

 

[dilo]

...and this crater is even more intriguing:

(3D too)

[slinted]

As with the calibrated MER images, there are radiance offsets and factors that need to be applied to get each image into absolute units. They are in the PDS tags. Hilariously, in the map projected images, there are two tags for offset and two tags for scaling, labeled identically. They are significantly different in value, and there's no mention of which is actually supposed to be used...but by trial and error, I think it's the second of each that is appropriate to the map projected images (could be COMPLETELY wrong about this.)

Here's a couple simple image->RGB channel color versions, but with the scaling factors applied (not even close to true color, but a step in the right direction)

The Meridiani image, thumbnail is rotated (left is south), full size has an arrow pointing at Victoria:


And a crop of the full swath containing the water-ice crater on Vastitas Borealis


I'm surprised they didn't mention the larger ice sheet north of the crater in their original releases. It is quite a sight.

[Nix]

Great work -as always, Daniel

The larger ice sheet is indeed very impressive.

Nico

[djellison]

BJORN - img2png has another 'requriement'

Dan - did you get those via the map interface or elsewhere? The bottom image is superb.

Doug

[slinted]

Thanks Nix, Doug!

Doug: classical interface, searching by orbit number, which works like a charm.
Having just discovered these radiometric map projected images (thank you jaywee!!!), well, I'm in 'little kid meets candy store' land to say the least

Here's another from much earlier in the mission.

In the Water at Martian South Pole image release, we saw an OMEGA false color image, and a b/w closeup of the South polar cap.

Here's that same area, in color (cropped, and at half res):

[Nix]

Man I'm enjoying these.. Keep the candy coming

Nico

[djellison]

Just getting stuff via the RSSD and I can see your folders on the server Dan

[djellison]

You know how some MER mosaics are large....

The Gusev obs from Jan 16th '04....oh my...

4295 x 75,543 - call it 325 Megapixels.

Doug

[Nix]

I'm getting that interface too now, yet where do you get info on orbit numbers and such?

Nico

[babakm]

You know how some MER mosaics are large....

I was playing with these a few months back and they made (what I thought was) a tidy computer setup slow to a crawl. I got bogged down in, what slinted calls "hilarious", tag hell and eventually gave up.

[djellison]

oooo- pretty

Orbit 648, nIR, G and B, not calibrated, but just adjust to look 'nice'

Doug

Attached thumbnail(s)