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Posted by: jaywee Apr 26 2006, 04:21 AM

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 http://www.rssd.esa.int/index.php?project=PSA

A color composite of a stripe of Meridiani Planum (includes Victoria) can be found http://utopia.pilsedu.cz/mex/1183-composite.jpg (2MB)

Posted by: dilo Apr 26 2006, 07:21 AM

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?

Posted by: jaywee Apr 26 2006, 07:37 AM

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

Posted by: dilo Apr 26 2006, 08:55 AM

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

Posted by: dilo Apr 26 2006, 09:28 AM

...and this crater is even more intriguing:

(3D too)

Posted by: slinted Apr 26 2006, 03:27 PM

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:
http://www.lyle.org/~markoff/hrsc/1183_color_victoria.jpg

And a crop of the full swath containing the http://www.esa.int/esaMI/Mars_Express/SEMGKA808BE_1.html
http://www.lyle.org/~markoff/hrsc/1343_crop.jpg

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

Posted by: Nix Apr 26 2006, 05:54 PM

Great work -as always, Daniel

The larger ice sheet is indeed very impressive.

Nico

Posted by: djellison Apr 26 2006, 06:32 PM

BJORN - img2png has another 'requriement'

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

Doug

Posted by: slinted Apr 26 2006, 06:39 PM

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 http://www.esa.int/SPECIALS/Mars_Express/SEMYKEX5WRD_1.html 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):

http://www.lyle.org/~markoff/hrsc/103_color_rescale.jpg

Posted by: Nix Apr 26 2006, 08:41 PM

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

Nico

Posted by: djellison Apr 27 2006, 06:12 PM

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

Posted by: djellison Apr 27 2006, 06:36 PM

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

Posted by: Nix Apr 27 2006, 06:49 PM

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

Nico

Posted by: babakm Apr 27 2006, 07:48 PM

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.

Posted by: djellison Apr 27 2006, 07:50 PM

oooo- pretty

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

Doug

Posted by: djellison Apr 27 2006, 08:15 PM

The middle part of that huge 70k tall Gusev observation

Looking around, it seems that a lot more nIR,G,B obs have been done than RGB.

Doug

Posted by: Bob Shaw Apr 27 2006, 08:29 PM

Doug:

About time, too! Happy mining!

Bob Shaw

Posted by: djellison Apr 27 2006, 08:32 PM

I'm struggling to find meridiani obs using lat long search - what parameters are you using?

Doug

Posted by: jaywee Apr 27 2006, 10:43 PM

The HSRC doc says it has following filters:
nadir, outer stereo (2), photometric (2) 675±90 nm; blue 440±45 nm; green 530±45 nm; red 750±20 nm; near-IR 970±45 nm.


I used the coords from Google Mars: -1.95 354.47

Posted by: djellison Apr 28 2006, 07:55 AM

1087, 1154, 1096 - all polar obs with nIR, G, B - perhaps the ice acts as an 'auto-level' thus making these look reasonable sans-radiometric-calibration

1201 just doesnt quite work out right - it needs that offset and scale processing I would imagine - and just for the sake of looking, I did the 1201 Super-Res channel mosaic as well.

Posted by: slinted Apr 28 2006, 08:54 AM

Nix: those first couple were just me looking up the orbit number mentioned in the press releases, I'm just getting a feel for the interface now as well...

babakm: that wasn't the most appropriate word choice on my part, but if we aren't laughing then we're probably crying. I see this glass as being half-full of data (which, for the ESA, is pretty good!)

Doug: 1201, with the scaling factors applied, looks...http://www.lyle.org/~markoff/hrsc/1201_color.jpg. I'm seeing a lot of individual images that are coming out that color, with almost no chromatic range at all. I'm not sure if a: I'm misapplying these factors, b: the factors are wrong c: it really did look this red from a high phase or illumination angle, both of which would exacerbate the atmospheric filtering or d: the red filter (which is realistically a Near-IR filter itself, with its center outside of human vision) is a bad indication of visible red.

Posted by: djellison Apr 28 2006, 09:33 AM

"Kid in Candy Store" T-Shirts now available...we're nearly there

There seems to have been a systematic survey of the south pole during the 1000-1200 orbit numbers. And similarly, a LOT of images of Val-Mar. Mosaic-o-rama-a-go-go at some point


Doug

Posted by: djellison Apr 28 2006, 10:05 AM

There is a graph somewhere that plots 'Doug Productivity' vs ' Interesting Data Releases' - it's going to be pretty damning...

anyway - more fun...

Posted by: djellison Apr 28 2006, 11:59 AM

Here's some interesting stuff....

A volcano ( I thought Ol.Mons but I have no idea to be honest - it isnt Ol Mons, a metaphorical cookie for whoever identifies it first ) from the HRSC, showing the coverage of the SRC - and then the SRC mosaic to match.

Because this is a stereo camera, and because there are some serious elevation changes in this lot, you get slight channel miss-match in places - especially with high altitude clouds ( as with some of the polar images )

The HRSC colour image is at a best res of 102 m/pixel - the SRC 3.5m/pixel ( but I've downscaled, so 7m/pixel )

Posted by: SigurRosFan Apr 28 2006, 01:02 PM

Doug, great image of Pavonis Mons. Too easy.

Yummy ...

Posted by: djellison Apr 28 2006, 01:03 PM

You win....a metaphorical cookie

Do you realise than in the space of 36 hrs we've output more HRSC images than ESA would do in about 6 months

Doug

Posted by: SigurRosFan Apr 28 2006, 01:10 PM

Thank you sooo much.

My favorite is Pollack with White Rock. Nice contex image.

Posted by: djellison Apr 28 2006, 01:23 PM

You noticed that one has SIX DD's on it...SIX - and all fairly large to be detected at that res.

Doug

Posted by: SigurRosFan Apr 28 2006, 02:15 PM

No. Six?? Where?

Posted by: djellison Apr 28 2006, 02:28 PM

Actually - I'm going to pitch for more like 12...and I've not highlighted them but there's potentially another 2 in there as well, possibly more. I used Blue, Green and nIR for these...

Blue
START_TIME = 2004-12-25T00:55:56.360Z

Green
START_TIME = 2004-12-25T00:55:37.866Z

nIR
START_TIME = 2004-12-25T00:55:04.547Z

So - given that the red image is 'leading' the blue by 52 seconds, the full res is 89.5 m/pixel, and I'm getting between 6 and 9 pixels of motion between thsoe two frames...I'd estimate a speed of between 10 and 15 m/sec in a SE direction - one problem would be figuring out how much of that apparant motion is because of the slightly different p.o.v. between filters - but I think 10m/sec is a fair estimation.

Look at me, getting all scientific

Sadly - they didn't do all the filtes for this obs, but there's a normal red, and an ND filter obs that I've not looked at, so I'll try and do the maths with those later - see how well it ties in with 10-15m/sec

Doug

Posted by: djellison Apr 28 2006, 02:43 PM

Anyone noticed the utterly CRAP flatfielding of the SRC images?

Doug

Posted by: paxdan Apr 28 2006, 03:08 PM

Don't hold back Doug, tell us what you really think!

Great work mind you, it's nice to see some images from MEX. Keep 'em coming.


i think i see at least another 7

Posted by: djellison Apr 28 2006, 03:10 PM

If I said what I really though, I'd end up banning myself from the forum, which would result in a quantum administrative black hole and the forum would vanish in a cloud of irony.



As a heads up - the ND3 filter is much much higher resolution than the colour filters - me thinks colour overlay on greyscale is in order.

Doug

Posted by: SigurRosFan Apr 28 2006, 03:26 PM

Thanks for pointing out the dusty whirlwinds.

Posted by: djellison Apr 28 2006, 03:49 PM

Ooops - thought I'd get the ND3 of the early Gusev observation....and it's large..and you can't resume downloads ( very bad ).....eek....a single image product, 200 meg and still going.

Posted by: jaywee Apr 28 2006, 05:40 PM

After few weeks the entire dataset should be (I hope) also available at http://pds-geosciences.wustl.edu/geodata/

Just have to say - the polar images you made are simply stunning.

Posted by: elakdawalla Apr 28 2006, 06:04 PM

Just have to toss in a "wow" here -- these images are tremendous! I agree with jaywee -- and those dust devil images are tremendous too! Wish I had time to play, but I'm perfectly happy to be a spectator to your fun -- just keep the images coming!

--Emily

Posted by: tedstryk Apr 28 2006, 09:16 PM

Wow...this is incredible!

Posted by: Phil Stooke Apr 28 2006, 11:43 PM

Really nice stuff. Well done everybody.

Phil

Posted by: djellison Apr 28 2006, 11:44 PM

A bit of Val.Mar joy before bed

Doug

Posted by: djellison Apr 29 2006, 01:54 PM

The map interface for the PSA is crappy, and the classical PSA is as bug ridden as hell - null this, 1>=0 that, blah blah.....

Yuck

Doug

Posted by: djellison May 2 2006, 11:55 AM

Emily will have some goodies to show you in the not too distant future re: the Dust Devils in the White-Rocks image...but meanwhile - another Gusev observation, this time Orbit 637, and I've changed my channel-mixing technique. I find using Colour Balance just on mid-tones is very effective ( +53, -10, -15 for those interested )

Doug

Posted by: elakdawalla May 4 2006, 01:19 AM

Duly blogged; these images are fabulous! Thanks Doug!

http://www.planetary.org/blog/article/00000561/
http://www.planetary.org/blog/article/00000562/

--Emily

Posted by: slinted May 4 2006, 11:21 AM

The images are top notch, but the dust devil movies are *incredible*. Excellent catch, and great presentation!

Posted by: djellison May 4 2006, 03:18 PM

Wonder if I squeeze a paper out of it?

ANyway - meanwhile, after noting that my martian geography is so bad I couldnt tell the difference between the north and south pole, I thought I'd play with something a little less...'dynamic'...

Thats just about every Val Mar image I can find from the first 1250 orbits, I may have missed a few - but as you can see then tend to drop into 'batches' of similar observations from which I could probably generate some nice regional mosaics.

Doug

Posted by: remcook May 4 2006, 04:23 PM

great job! this is so cool

yay to more public releases

Posted by: DDAVIS May 4 2006, 06:07 PM

Where can I find NASAVIEW for Mac OSX? it's not in the usual JPL location.

Don

Posted by: djellison May 4 2006, 06:19 PM

Here - http://pds.jpl.nasa.gov/tools/software_download.cfm - I think.

Doug

Posted by: jaywee May 5 2006, 07:52 PM

Doug,
I just can't stress enough how magnificent the DD animations you made are. I wonder if ESA knows what they have (Have you shown them to Jim Bell?)

Anyway, as I said before - the archive is now available at http://pds-geosciences.wustl.edu/geodata/mex-m-hrsc-5-refdr-mapprojected-v1/ it's biggest advantage is easy accessibility of the thumbnail jpg images.

Oddly, eventhough the ESA page says it covers 1-1863, it ends at 1295. Have you found data from newer orbits in the PSA interface?

Posted by: djellison May 5 2006, 08:35 PM

Yup - via the psa you can get to 1800andsomething

The browse JPG's are utterly perfect - they're exactly what was needed, and being able to just grab an orbits data instead of using the lengthy convoluted pain-in-the-backside PSA system is a big big BIG bonus - if you can catch up to 1863, it would be great.

Doug

Posted by: slinted Jul 20 2006, 08:41 PM

I got a reply from the HRSC data processing manager, Dr. Thomas Roatsch, about some of the map-projected PDS/PSA tag issues, which seemed appropriate to share here.

As to the duplicate RADIANCE_OFFSET and RADIANCE_SCALING_FACTOR tags, the second ones are correct to the map projected images. For anyone particularly interested in the reflectance data, there is a necessary tag which is missing (REFLECTANCE_OFFSET). Dr. Roatsch has suggested to the PDS/PSA that they deliver a new version soon to fix both of these problems.

When considering the radiance information recoverable by applying the offset and scaling factors, a third tag becomes important as well. The radiance values are in units of Watts/m^2/sr, and is not spectral radiance (Watts/m^2/sr/nm). This means that the calibrated radiance values in the images are a summation across the whole bandwidth of the filter+ccd. This is important because bandwidths of the HRSC color filters differ significantly. The red filter is 48 nm wide, green is 88 nm wide, and blue is 76 nm wide. In other words, if one didn't take this into consideration, the green filter would appear almost twice as 'bright' as the red filter, since its radiance is considered across a spectrum twice as wide.

So, to recover spectral radiance from the HRSC map-projected images, one must apply the offset and scaling factors, then divide that value by the bandwidth of the filter.

Posted by: djellison Jul 20 2006, 08:56 PM

Nice and simple then

Doug

Posted by: Malmer Jul 22 2006, 08:15 AM

Dont forget to throw salt thrice over your left shoulder on a full moon night...

Posted by: Phil Stooke Jul 25 2006, 01:52 PM

Here's a recent Phobos image from Mars Express.

Phil

Posted by: AlexBlackwell Jul 25 2006, 04:13 PM

I'm still looking for a good, perhaps even iconic, Phobos image for my avatar. The search continues...

Posted by: djellison Jul 25 2006, 04:31 PM

My fav Phobos image...but I guess you're looking for something a bit better than that

D

Posted by: stevesliva Jul 27 2006, 02:46 AM

Gotta have Stickney.

http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mar_Phobos

Posted by: Phil Stooke Jul 27 2006, 02:19 PM

Here's the most recent Deimos image in the PSA. It's a composite of two SR frames.

Phil

Posted by: djellison Jul 27 2006, 02:33 PM

Here's one for you Phil,

Deimos has, to me at least, looked to be a much smoother almost 'softer' looking body than Phobos. Is that a symptom of the common images we see being of lower resolution, or an actual property difference between the two.

Doug

Posted by: Phil Stooke Jul 27 2006, 03:20 PM

It's not a resolution effect. The best Viking images of Deimos have higher resolution that the best Viking images of Phobos. Deimos is smoother because it's almost completely covered by a thick debris layer. Peter Thomas (Cornell) has argued, and I agree, that the debris is ejecta from a crater with a diameter almost as large as Deimos's longest dimension, which is visible to us as the south polar "saddle" of Deimos. Most debris from a crater like that is ejected at very low velocity (forming the heaped-up rim of a lunar crater, plus lots of that never gets outside the crater at all) and coated Deimos at once. The rest was probably re-accreted from Mars orbit. Phobos lacks a "giant" crater of the same relative scale.

Phil

Posted by: Phil Stooke Jul 27 2006, 03:22 PM

Here's the saddle:

Phil

PS one of the most amazing views in the solar system would be had from the righthand hill here, looking across the 10 km wide saddle to the other hill, with Mars in the background surrounding that hill like a halo.

Posted by: AlexBlackwell Jul 27 2006, 04:43 PM

I'm getting closer but not quite there yet. Maybe I should change my avatar to Deimos

Posted by: Phil Stooke Jul 31 2006, 01:24 PM

Here's another image of Phobos from the PSA. It's not so hard to use once you get into it. I was misled slightly by the image size in the label, as I had to open this as a raw image in Photoshop, but once you remember to add the line prefix pixels to the width of the image it's OK.

Phil



If you compare this with the last one, it's a mirror image. This is the ND2 image and it's reversed. The previous Phobos post was SR2, and it's right-reading.

Posted by: AlexBlackwell Aug 14 2006, 09:48 PM

I was going to use the latest http://www.msss.com/mars_images/moc/2006/08/11/index.html but I really prefer Phobos. Luckily, ugordan made a nice PNG image for me based on http://www.msss.com/moc_gallery/ab1_m04/images/SP252603.html. Hopefully, this should alleviate the bandwidth issues some were having loading my previous Phobos avatar, which was an offsite image at MSSS.

Posted by: Stephen Aug 15 2006, 01:33 AM

Uh, oh. I hate to point it out but I can see a face in that image! Not so much on the thumbnail version as on the fullsize one. It kind of pops out there. (It's on the righthand side looking toward the right: two eyes--one round, the other sort of orientalish--a flat nose, and the lefthand cheek, a kind of sneer or grimace for a mouth.)

Maybe you shouldn't have shown us that pic! Now we'll be hearing about The Face on Deimos and how NASA tried to hide it from us.

======
Stephen

Posted by: AlexBlackwell Aug 15 2006, 01:41 AM

I'll bet ESA PAO never used this one on the kooks: "Pardon moi. One of our scientists accidentally included one of his wife's ultrasound images."

Posted by: ngunn Aug 15 2006, 10:52 AM

There are probably faces all over it. The first one I noticed is facing to the left and down. Big white lips at bottom of image, teardrop-shaped eye above, nose in profile flush with upper lip. In fact the whole thing seems to be a giant head sculpture obviously made by the Roswell people (who also influenced the Olmecs) . . .

Posted by: Phil Stooke Jan 30 2007, 02:19 PM

Check out this abstract from the new EGU meeting: Greg Michaels on a new HRSC data viewer. Very promising. Also news of the release of HRSC-derived topography data.

Phil

http://www.cosis.net/abstracts/EGU2007/07559/EGU2007-J-07559.pdf?PHPSESSID=f354d1120145d46d488baf6c8092ff18

(or go to:

http://www.cosis.net/members/meetings/sessions/accepted_contributions.php?p_id=250&s_id=4149&PHPSESSID=f354d1120145d46d488baf6c8092ff18

and find his abstract in the middle of the page, or failing that go to:

http://www.cosis.net/members/meetings/programme/view.php?m_id=40&p_id=250&PHPSESSID=f354d1120145d46d488baf6c8092ff18

and find the mars session in the middle of that page.

Hey, come on people, give us some simple URLs! All that search stuff is unnecessary or should be hidden.

Phil

Posted by: MarkL Jan 30 2007, 08:13 PM

This is great to see Phil. I think NASA and the various PI's (notably MSSS, THEMIS, the MER/Athena teams and the HiRISE team, Cassini to a lesser extent) have really set a high standard for outreach and no doubt the ESA is feeling some heat for keeping its data so close. But that is not to in any way discourage them from this generous initiative.