New Horizons: Near Encounter Phase |
New Horizons: Near Encounter Phase |
Jul 28 2015, 10:05 PM
Post
#1261
|
|
Member Group: Members Posts: 237 Joined: 22-December 07 From: Alice Springs, N.T. Australia Member No.: 3989 |
LORRI mosaic Nice work :-) I like your ideas about trying to be as accurate as possible. When I've stitched photos of scenes that I know on earth (Central Australia has some big panoramas!) then it becomes really obvious how easy it is to majorly distort things!! ……Hᴜɢʜ…ツ |
|
|
Jul 28 2015, 10:59 PM
Post
#1262
|
|
Senior Member Group: Members Posts: 1621 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Unfortunately I am unable to view images as large as 16K. Are you working on a map of Charon too? The animation sounds like it will be awesome to see when it's done. I posted an 8K version of the map now here. Perhaps Charon will be good for me to do when some additional frames come in over time. So far I have just a few frames for the animation, I recall Bjorn had a good one earlier as well. -------------------- Steve [ my home page and planetary maps page ]
|
|
|
Jul 29 2015, 01:17 PM
Post
#1263
|
|
Junior Member Group: Members Posts: 21 Joined: 30-June 15 From: Brooklyn NY Member No.: 7543 |
Here is my take on the LORRI mosaic, rotated and very slightly sharpened. I colorized it with the 2x2 color picture of Pluto. Since this color low resolution picture and the B&W LORRI mosaic didn't overlap correctly with simple rotation, translation or shearing, I cut the color picture into 50 segments. Then I warped each segment to match the LORRI mosaic. It took me hours of work on Gimp but the result is worth it Beautiful! |
|
|
Jul 29 2015, 06:20 PM
Post
#1264
|
||
Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
I've semi-manually extracted the footprint of the 80 metres per pixel mosaic (P_MVIC_LORRI_CA) aka the highest-resolution image series of Pluto (AFAIK) from the NASA's Eyes application:
The zig-zag pattern is an artefact of my crude plotting and introduced to reset accumulating inaccuracy; presumably related to Pluto's changing appearance as seen from New Horizons due to the craft's high velocity. How accurate the NASA's Eyes application is supposed to be, I have no idea (to some extent, I did this as a training exercise). -------------------- |
|
|
||
Jul 29 2015, 06:43 PM
Post
#1265
|
|
Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
|
|
|
Jul 29 2015, 07:17 PM
Post
#1266
|
|
Junior Member Group: Members Posts: 66 Joined: 26-May 06 Member No.: 790 |
the footprint of the 80 metres per pixel mosaic Seems like a good time to reiterate a question I've had [ http://www.unmannedspaceflight.com/index.p...mp;#entry223108 ] Basically, how illuminated are we expecting the hi-res pictures of Krun Macula to be (some graphics seem to show that part of Pluto's disk deep in shadow during closest approach), & how is this expected to impact resolution? |
|
|
Jul 29 2015, 08:10 PM
Post
#1267
|
|
Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
MOD NOTE: Moved 8 posts to start a new topic on Pluto System Cartography.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
|
|
|
Jul 30 2015, 12:16 AM
Post
#1268
|
|
Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
How accurate the NASA's Eyes application is supposed to be, I have no idea It shows the 15 frame mosaic farther north than the images we have down. How much affect that difference would have the track of the images taken near close approach I have no idea. Looking at it last weekend I noted three passes at higher resolution than what we have down, the highest resolution pass you've shown ~80 m per pixel, another at ~120 m per pixel following a somewhat similar track, and one at ~250 m per pixel that crosses some mid latitudes terrain with varying albedos and ended in the eastern edge of Cthulhu Regio. There is also a set of 16 pairs of images in four columns which may be a 4x4 mosaic at 3x the resolution of the 2x2 mosaic. |
|
|
Jul 30 2015, 09:49 AM
Post
#1269
|
||
Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
By the way, I've realised that the LORRI pointing in Eyes that I used to project the rest of the path is not where I subconsciously thought it were, so the footprint is probably off 1-2 pixels most places in a south-westerly direction relative to the Eyes application (but relative to the real thing: who knows..).
Seems like a good time to reiterate a question I've had [ http://www.unmannedspaceflight.com/index.p...mp;#entry223108 ] Basically, how illuminated are we expecting the hi-res pictures of Krun Macula to be (some graphics seem to show that part of Pluto's disk deep in shadow during closest approach), & how is this expected to impact resolution? You can check for yourself in NASA's Eyes with the preview option what things look like (if you haven't already). The sun was certainly setting on Krun, so it should only have gotten darker there since the stereo mosaic was taken. Given the uncertainty of where Pluto was, I would guess that they've used similar settings for all of the strip, but I haven't seen such details mentioned anywhere. It shows the 15 frame mosaic farther north than the images we have down. How much affect that difference would have the track of the images taken near close approach I have no idea. It seemed very roughly correct, though, which is why I bothered to make that image at all (it also fits well with similar images posted here). QUOTE Looking at it last weekend I noted three passes at higher resolution than what we have down, the highest resolution pass you've shown ~80 m per pixel, another at ~120 m per pixel following a somewhat similar track, and one at ~250 m per pixel that crosses some mid latitudes terrain with varying albedos and ended in the eastern edge of Cthulhu Regio. According to the list machi posted (#670), there is indeed one mosaic at 0.24 km/px and 0.12 km/px. I was also thinking about making a footprint image for those. In Eyes, there is also this strange thing: It's closer to closest approach, so should be able to give even higher resolution than 80 metres - but are any usable images actually taken? Today, I am unable to reproduce that result; now the LORRI FOV at that time is pointing into nightside terrain.. -------------------- |
|
|
||
Jul 30 2015, 04:19 PM
Post
#1270
|
|
Member Group: Members Posts: 807 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
-------------------- |
|
|
Jul 30 2015, 05:02 PM
Post
#1271
|
|
Member Group: Members Posts: 204 Joined: 14-April 06 From: Seattle, WA Member No.: 745 |
Absolutely stunning! Thank you!
Ron |
|
|
Jul 30 2015, 05:17 PM
Post
#1272
|
|
Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
It seemed very roughly correct, though, which is why I bothered to make that image at all (it also fits well with similar images posted here). Oh, its been updated since I looked at it this weekend. The Pluto map now has better resolution and the position of the 15 frame mosaic looks more accurate. |
|
|
Jul 30 2015, 06:03 PM
Post
#1273
|
|
Founder Group: Chairman Posts: 14431 Joined: 8-February 04 Member No.: 1 |
As a heads up - we are slowly getting reconstructed pointing data from the NH team and putting it into Eyes as and when we can.
Yesterday a new release went live with some of that data included. |
|
|
Jul 31 2015, 10:16 AM
Post
#1274
|
||
Lord Of The Uranian Rings Group: Members Posts: 798 Joined: 18-July 05 From: Plymouth, UK Member No.: 437 |
Are they downlinking selected strips of individual LORRI frames? The official Pluto photomosaic would seem to indicate this is the case:
http://photojournal.jpl.nasa.gov/catalog/PIA19858 -------------------- |
|
|
||
Jul 31 2015, 10:59 AM
Post
#1275
|
|
Member Group: Members Posts: 137 Joined: 16-June 15 Member No.: 7507 |
Is there going to be a press conference today (and if so, what time)? If there is then maybe someone will ask about the high res strips.
|
|
|
Lo-Fi Version | Time is now: 28th March 2024 - 11:40 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |