Juno Perijove 13 |
Juno Perijove 13 |
May 30 2018, 01:43 PM
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#31
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Member Group: Members Posts: 923 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. -------------------- |
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May 31 2018, 02:48 AM
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#32
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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Jun 3 2018, 09:26 PM
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#33
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IMG to PNG GOD Group: Moderator Posts: 2250 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:
And enhanced versions: 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: 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 |
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Jun 6 2018, 07:35 PM
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#34
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Senior Member Group: Members Posts: 2346 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. |
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Jun 7 2018, 12:15 AM
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#35
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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Jun 7 2018, 08:32 PM
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#36
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Member Group: Members Posts: 923 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. -------------------- |
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Jun 10 2018, 12:07 AM
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#37
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IMG to PNG GOD Group: Moderator Posts: 2250 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:
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 |
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Jun 16 2018, 12:12 AM
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#38
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IMG to PNG GOD Group: Moderator Posts: 2250 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).
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Jun 25 2018, 11:40 PM
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#39
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IMG to PNG GOD Group: Moderator Posts: 2250 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:
And enhanced versions that have among other things been sharpened with an unsharp mask where the mask radius gets smaller near the horizon: 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). 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 |
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Jun 26 2018, 12:13 PM
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#40
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
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Jul 6 2018, 10:34 AM
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#41
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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Aug 3 2018, 02:37 PM
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#42
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Member Group: Members Posts: 923 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 -------------------- |
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Aug 25 2018, 03:16 PM
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#43
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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Apr 1 2019, 06:17 AM
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#44
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Member Group: Members Posts: 923 Joined: 10-November 15 Member No.: 7837 |
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