IPB

Welcome Guest ( Log In | Register )

3 Pages V  < 1 2 3  
Reply to this topicStart new topic
Juno Perijove 13
Sean
post May 30 2018, 01:43 PM
Post #31


Member
***

Group: Members
Posts: 709
Joined: 10-November 15
Member No.: 7837



PJ13_40


5 image composite. Reprojections of 41, 42, 43, 44 on 40. LOTS of photoshoppery to blend different exposures.


--------------------
Go to the top of the page
 
+Quote Post
Gerald
post May 31 2018, 02:48 AM
Post #32


Senior Member
****

Group: Members
Posts: 2170
Joined: 7-December 12
Member No.: 6780



Seán's composite nicely shows the STB Spectre.

Here PJ13 departure RGB drafts.
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jun 3 2018, 09:26 PM
Post #33


IMG to PNG GOD
****

Group: Moderator
Posts: 1979
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



Here are my versions of image PJ13_27 ("North North North Temperate Belt"). Approximately true color/contrast:

Attached Image
Attached Image
Attached Image


And enhanced versions:

Attached Image

Attached Image
Attached Image


The subspacecraft latitude is ~40 degrees north; areas near near this latitude have been especially photogenic since Juno's arrival. Because the perijove point has been moving farther north as the mission progresses, the image resolution in this area is now somewhat higher than it was earlier in the mission.

For this image, lossless compression (Huffman) was used. The most obvious difference this makes is in the blue channel images which are always significantly darker than the red and green ones. The enhanced images are also free from the spurious 'contouring' that is sometimes visible in low contrast areas in images containing compression artifacts.

An interesting-looking feature is visible not far from the right edge at ~(1325,1120) in the 'central' image. In enhanced versions of PJ13_27 that I saw shortly after the flyby it seemed to me that this might be a big, dark and very long cloud shadow. However, this is an illusion. Closer inspection, especially in images without exaggerated contrast, reveals that this is simply a dark cloud of the same (or similar) color as several nearby features. Also it turns out that the sun is ~40 degrees above the horizon at this location, i.e. no long shadows at this location. Here is an enlarged crop from the true color/contrast image, centered on this feature:

Attached Image


A subset of the image metadata:

IMAGE_TIME = 2018-05-24T05:31:00.639
MISSION_PHASE_NAME = PERIJOVE 13
PRODUCT_ID = JNCE_2018144_13C00027_V01
SPACECRAFT_ALTITUDE = 7922.7 km
SPACECRAFT_NAME = JUNO
SUB_SPACECRAFT_LATITUDE = 40.6834
SUB_SPACECRAFT_LONGITUDE = 15.2981
TITLE = PJ13 North North North Temperate Belt
Resolution at nadir: ~5.5 km/pixel
Go to the top of the page
 
+Quote Post
Gerald
post Jun 6 2018, 07:35 PM
Post #34


Senior Member
****

Group: Members
Posts: 2170
Joined: 7-December 12
Member No.: 6780



Perijove-13 flyby HD movie is online on YouTube.

This time, I've implemented and applied a filter to reduce the number of bright blips caused by energetic particle hits.

I'm going to prepare MP4 scenes and stills for upload.
Go to the top of the page
 
+Quote Post
Gerald
post Jun 7 2018, 12:15 AM
Post #35


Senior Member
****

Group: Members
Posts: 2170
Joined: 7-December 12
Member No.: 6780



PJ13 flyby MP4 file full HD, MP4 scenes and stills (JPG).
Go to the top of the page
 
+Quote Post
Sean
post Jun 7 2018, 08:32 PM
Post #36


Member
***

Group: Members
Posts: 709
Joined: 10-November 15
Member No.: 7837



Perijove 13


2k60 version on Youtube

Re-timed / gamma / masked blends / sharpen based on Gerald's source.

Music by Jóhann Jóhannsson.


--------------------
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jun 10 2018, 12:07 AM
Post #37


IMG to PNG GOD
****

Group: Moderator
Posts: 1979
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



Here are my versions of image PJ13_44, mainly processed to test a new version of my software. Everything seems to work as planned. Approximately true color/contrast and an enhanced version:

Attached Image
Attached Image


And a metadata subset:

IMAGE_TIME = 2018-05-24T06:21:08.178
MISSION_PHASE_NAME = PERIJOVE 13
PRODUCT_ID = JNCE_2018144_13C00044_V01
SPACECRAFT_ALTITUDE = 53567.6 km
SPACECRAFT_NAME = JUNO
SUB_SPACECRAFT_LATITUDE = -63.4397
SUB_SPACECRAFT_LONGITUDE = 64.0456
TITLE = PJ13 Jet S6
Resolution at nadir: ~37 km/pixel
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jun 16 2018, 12:12 AM
Post #38


IMG to PNG GOD
****

Group: Moderator
Posts: 1979
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



Here are two rather unusual images showing details from PJ13_31. The images show Jupiter's blue sky at the limb. They have been enlarged by a factor of 3 relative to the original data to show the blue sky more clearly. Color/contrast is approximately natural but the brightness of the blue sky at the limb has been increased slightly relative to other parts of the images. These images should be pretty accurate since I couldn't see any errors in the several framelets I checked with limb fits when processing the data (accurate limb fits are a bit difficult in these hi-res images though because the limb is rather fuzzy). In these images the resolution at the limb is ~4 km/pixel (the resolution of the original data at the limb is ~13 km/pixel).

Attached Image
Attached Image
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jun 25 2018, 11:40 PM
Post #39


IMG to PNG GOD
****

Group: Moderator
Posts: 1979
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



Here are my versions of image PJ13_31 (Hot Spot) which is a a very high resolution image. Approximately true color/contrast:

Attached Image
Attached Image
Attached Image


And enhanced versions that have among other things been sharpened with an unsharp mask where the mask radius gets smaller near the horizon:

Attached Image

Attached Image
Attached Image


Due to JunoCam's wide field of view (~58°), the resolution of the high resolution images can vary a lot across the field of view, unlike typical images from narrow angle cameras. The 'image' below shows how the resolution varies in one of the above images. It is computed/rendered at lower resolution than the images above and therefore appears a bit crude. Only the distance is taken into account when computing the resolution (for example the highly oblique viewing angle near the horizon is not included, doing so would result in lower resolution).

Attached Image


And some metadata. Note that the resolution at the nadir point is ~2.5 km/pixel.

IMAGE_TIME = 2018-05-24T05:43:08
MISSION_PHASE_NAME = PERIJOVE 13
PRODUCT_ID = JNCE_2018144_13C00031_V01
SPACECRAFT_ALTITUDE = 3685.5 km
SPACECRAFT_NAME = JUNO
SUB_SPACECRAFT_LATITUDE = 6.5491
SUB_SPACECRAFT_LONGITUDE = 27.2725
TITLE = PJ13 Hot Spot
Resolution at nadir: ~2.5 km/pixel
Go to the top of the page
 
+Quote Post
Gerald
post Jun 26 2018, 12:13 PM
Post #40


Senior Member
****

Group: Members
Posts: 2170
Joined: 7-December 12
Member No.: 6780



Links to a somewhat preliminary version of partial PJ13 maps:

RGB maps and
CH4 maps.

Especially the maps derived from images taken during departure s/c ops will require a revision.
Go to the top of the page
 
+Quote Post
Sean
post Jul 6 2018, 10:34 AM
Post #41


Member
***

Group: Members
Posts: 709
Joined: 10-November 15
Member No.: 7837



PJ13_37 based on Matt Brealey's updated pipeline...







--------------------
Go to the top of the page
 
+Quote Post
Sean
post Aug 3 2018, 02:37 PM
Post #42


Member
***

Group: Members
Posts: 709
Joined: 10-November 15
Member No.: 7837





Click this link to see the animation...
PJ13 8 frame animation

Approx 5 minutes between frames lasting 35 minutes



--------------------
Go to the top of the page
 
+Quote Post
Sean
post Aug 25 2018, 03:16 PM
Post #43


Member
***

Group: Members
Posts: 709
Joined: 10-November 15
Member No.: 7837



I give Jupiter a '10'









--------------------
Go to the top of the page
 
+Quote Post

3 Pages V  < 1 2 3
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 23rd October 2018 - 05:44 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and 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 a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.