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Perijove 1 (PJ1), August 27, 2016
elakdawalla
post Sep 2 2016, 04:45 PM
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New images released!

And raw images at various processing levels from PJ1 are now in the JunoCam gallery.


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elakdawalla
post Sep 2 2016, 05:11 PM
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I found the gallery view on the website a little confusing, so I've downloaded all the data and stuck it all in a single zip file here. I also took the liberty of renaming the metadata files to match the file name convention for the image files they are associated with.


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mcaplinger
post Sep 2 2016, 05:18 PM
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QUOTE (elakdawalla @ Sep 2 2016, 08:45 AM) *
New images released!

Our long national nightmare is over. rolleyes.gif

New thread for perijove data? (Although the "marble movie" will continue for orbit 1 outbound and orbit 2 inbound.)


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elakdawalla
post Sep 2 2016, 05:32 PM
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Good idea! It'll help to keep the Marble Movie and PJ1 conversations separated.


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S_Walker
post Sep 2 2016, 05:35 PM
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QUOTE (elakdawalla @ Sep 2 2016, 12:11 PM) *
I found the gallery view on the website a little confusing, so I've downloaded all the data and stuck it all in a single zip file here. I also took the liberty of renaming the metadata files to match the file name convention for the image files they are associated with.


Thank you Emily. Is it just me, or is the color balance off on the latest processed versions? Looks too yellow to me, whereas the pole areas always appear more gray in most amateur images. I used that as the basis for my color decisions earlier, though I'm just eyeballing it.
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elakdawalla
post Sep 2 2016, 05:57 PM
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The color clearly needs to be adjusted.
I've now made a browse page to the PJ1 data.
Note that today's release also includes the Ganymede image we were expecting from August 26.


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fredk
post Sep 2 2016, 06:37 PM
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Thanks for the compilation, Emily.

Some features in the closest images that at first I thought might be tall-cloud shadow streaks:
Attached Image

But they don't seem to be orthogonal to the terminator (unless there's something really weird about the projection geometry...), so probably just cloud features.
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mcaplinger
post Sep 2 2016, 06:39 PM
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QUOTE (S_Walker @ Sep 2 2016, 09:35 AM) *
is the color balance off on the latest processed versions?

There is no color balancing of any kind done for the gallery processing, this is the raw color out of the camera.


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Roman Tkachenko
post Sep 2 2016, 07:19 PM
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My rough attempt to reveal some features dry.gif
Attached Image


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Bjorn Jonsson
post Sep 2 2016, 07:55 PM
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Here is a quick and dirty enhancement of image JNCE_2016240_00C06163_V01-mapprojected.png:

Attached Image


This image looks like it was intentionally overexposed to better reveal details near the terminator. One particularly interesting feature is visible near the bottom where clear vertical relief seems to be visible (I don't think this is an artifact). There seems to be an elevated cloud at the terminator - it appears much brighter than other features at the terminator and may even extend to the nightside (I don't know the exact location of the terminator but should be able to determine it later). There is a dark feature left of it that looks like a 'depression' (could also be a dark cloud feature). One thing I find striking about this image and the other polar images is the large number of roughly circular storm systems.

I don't know when this image was obtained or at what range. The label file (JSON file) seems to be corrupt and contains no data of interest, just "<Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message>..." etc.

EDIT: Now I notice that Emily's index page includes the distance from Jupiter, it is 70380 km. I was far too excited about these new images to notice this!
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mcaplinger
post Sep 2 2016, 08:06 PM
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QUOTE (Bjorn Jonsson @ Sep 2 2016, 11:55 AM) *
This image looks like it was intentionally overexposed to better reveal details near the terminator.

The label file (JSON file) seems to be corrupt and contains no data of interest...

This is one of the aurora search images. (We didn't see the aurora, BTW.) I was hoping that the RATIONALE_DESC field in the metadata would have more detail but it doesn't look like that was done for this release. Keep in mind that this is the first time we've published real data to missionjuno so there are still some kinks to work out.

The (admittedly klunky) metadata download worked for me for this image.

CODE
{
  "COMPRESSION_TYPE": "INTEGER COSINE TRANSFORM",
  "DATA_SET_ID": "JUNO-J-JUNOCAM-2-EDR-L0-V1.0",
  "EXPOSURE_DURATION": "51.200000 <ms>",
  "FILE_NAME": "JNCE_2016240_00C06163_V01-raw.png",
  "FILE_RECORDS": 9216,
  "FILTER_NAME": [
    "BLUE",
    "GREEN",
    "RED"
  ],
  "FOCAL_PLANE_TEMPERATURE": "273.0 <K>",
  "IMAGE_TIME": "2016-08-27T12:00:44.127",
  "INSTRUMENT_HOST_NAME": "JUNO",
  "INSTRUMENT_ID": "JNC",
  "INSTRUMENT_NAME": "JUNO EPO CAMERA",
  "INTERFRAME_DELAY": "0.378 <s>",
  "JNO:TDI_STAGES_COUNT": 16,
  "LINES": 9216,
  "LINE_PREFIX_BYTES": 0,
  "LINE_SAMPLES": 1648,
  "LINE_SUFFIX_BYTES": 0,
  "MISSION_PHASE_NAME": "PERIJOVE 1",
  "ORBIT_NUMBER": 1,
  "PJ": "01",
  "PROCESSING_LEVEL_ID": 2,
  "PRODUCER_ID": "JUNO_JUNOCAM_TEAM",
  "PRODUCT_CREATION_TIME": "2016-09-01T14:08:33",
  "PRODUCT_ID": "JNCE_2016240_00C06163_V01",
  "PRODUCT_VERSION_ID": 1,
  "RATIONALE_DESC": "Jupiter imaging",
  "RECORD_BYTES": 1648,
  "SAMPLE_BITS": 8,
  "SAMPLE_BIT_MASK": "2#11111111#",
  "SAMPLE_BIT_MODE_ID": "SQROOT",
  "SAMPLE_TYPE": "UNSIGNED_INTEGER",
  "SAMPLING_FACTOR": 1,
  "SEQUENCE_ID": "jm0003",
  "SOFTWARE_NAME": "JUNOMAKEPDS.PY 0.4",
  "SOLAR_DISTANCE": "8.1519e+08 <km>",
  "SOURCE_PRODUCT_ID": "3D-0900011813-2016-240T15.38.52",
  "SPACECRAFT_ALTITUDE": "70379.5 <km>",
  "SPACECRAFT_CLOCK_START_COUNT": "525571420:91",
  "SPACECRAFT_CLOCK_STOP_COUNT": "N/A",
  "SPACECRAFT_NAME": "JUNO",
  "STANDARD_DATA_PRODUCT_ID": "JUNOCAM-EDR",
  "START_TIME": "2016-08-27T12:00:44.127",
  "STOP_TIME": "2016-08-27T12:00:53.199",
  "SUB_SPACECRAFT_LATITUDE": "88.4528",
  "SUB_SPACECRAFT_LONGITUDE": "70.4651",
  "TARGET_NAME": "JUPITER",
  "TOKEN_ID": [
    ""
  ]
}



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elakdawalla
post Sep 2 2016, 08:12 PM
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QUOTE (Bjorn Jonsson @ Sep 2 2016, 12:55 PM) *
I don't know when this image was obtained or at what range. The label file (JSON file) seems to be corrupt and contains no data of interest, just "<Error><Code>NoSuchKey</Code><Message>The specified key does not exist.</Message>..." etc.

Sounds like a bad link on my S3 page, I will fix this.

Edit: Fixed. Sorry!


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Bjorn Jonsson
post Sep 2 2016, 08:12 PM
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QUOTE (mcaplinger @ Sep 2 2016, 08:06 PM) *
The (admittedly klunky) metadata download worked for me for this image.


Thanks for the metadata - lots of useful information there. I downloaded the file I have from Emily's index page, maybe something is wrong there.

EDIT: Yes, Emily confirms this in the post above.
EDIT2: It has now been fixed.

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Roman Tkachenko
post Sep 2 2016, 09:57 PM
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Processed version of JNCE_2016240_00C06182_V01
Attached Image


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Bjorn Jonsson
post Sep 2 2016, 10:30 PM
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Here is a quick and dirty enhancement/processing of image JNCE_2016240_00C06164_V01-mapprojected.png:

Attached Image


I didin't pay much attention to the color balance, I simply wanted to bring out various small scale features, especially near the terminator. Significant vertical relief/shadows seems to be visible near the terminator. For example, the feature at (777,1475) is probably real (a short 'wall' roughly parallel to the terminator). Several big, 'depression-like' features are visible near the terminator, especially in the lower half of the image. The processing has also revealed compression artifacts.

This image was obtained at a range of 36859 km from Jupiter's cloud tops, resulting in a resolution of ~20 km/pixel at the nadir.

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