JUICE, ESA's L-class mission to the Jovian system |
JUICE, ESA's L-class mission to the Jovian system |
Feb 6 2022, 07:37 AM
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#46
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
Taking into account ESA's dumb way to communicate JUICE's launch delay to 2023 and that so far no new official launch date and trajectory has been published, I am wondering if ESA's PR people are trying to tease us with this sort of tweet
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Feb 26 2022, 06:53 AM
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#47
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
Unbelievable! Finally, someone with a Twitter account has got the cojones to ask ESA about the JUICE launch date and has even got a more or less useful reply: "...stay tuned!"
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Mar 15 2022, 09:59 AM
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#48
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
A new JUICE baseline trajectory (CReMA 5.0b23.1) is published - launch on 5 April 2023. Earlier, August 2023 was mentioned as back-up launch date. By the way, is there an easy and convenient way to read or visualize Orbit kernels?
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Mar 15 2022, 05:16 PM
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#49
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
By the way, is there an easy and convenient way to read or visualize Orbit kernels? You can use SPICE-enhanced Cosmographia https://naif.jpl.nasa.gov/naif/cosmographia.html but I would call that neither easy nor convenient. There's a steep learning curve, especially with setting up the JSON files. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Mar 15 2022, 06:21 PM
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#50
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
At least for ESA Missions there are official Cosmographia add-ons that make adding them pretty simple:
https://www.cosmos.esa.int/web/spice/cosmographia -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Mar 15 2022, 08:20 PM
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#51
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Member Group: Members Posts: 411 Joined: 18-September 17 Member No.: 8250 |
.. By the way, is there an easy and convenient way to read or visualize Orbit kernels? A relatively easy way to produce plots and tables is the ESA WebGeocalc web page. The above plot of distance to Jupiter was produced by first selecting "juice_crema_5_0b23_1" kernel set from the pulldown, and entering the below settings in the GUI. CODE Target type Object Target JUPITER Observer type Object Observer JUICE Reference frame IAU_JUPITER Light propagation No correction Time system UTC Time format Calendar date and time Time range 2023-05-01 to 2031-08-01 Step 200 equal intervals State representation Rectangular Note: The IAU_JUPITER (rotating) Reference Frame isn't isn't a good choice for plotting positions. Using JUPITER_SUN_ORB (of which I haven't looked up the definition) for the Reference Frame, and plotting the X,Y positions (from downloaded CSV table) looks like: |
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Mar 16 2022, 12:44 AM
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#52
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Member Group: Members Posts: 706 Joined: 22-April 05 Member No.: 351 |
At least for ESA Missions there are official Cosmographia add-ons that make adding them pretty simple: https://www.cosmos.esa.int/web/spice/cosmographia For those who can read this data, when does the spacecraft arrive at Jupiter? Thanks. -------------------- |
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Mar 16 2022, 03:22 AM
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#53
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Member Group: Members Posts: 706 Joined: 22-April 05 Member No.: 351 |
At least for ESA Missions there are official Cosmographia add-ons that make adding them pretty simple: https://www.cosmos.esa.int/web/spice/cosmographia For those who can read this data, when does the spacecraft arrive at Jupiter? Thanks. -------------------- |
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Mar 16 2022, 10:02 AM
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#54
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
Many thanks! Cosmographia gave me an error message when I tried (not very hard) to load the JSON file, however WebGeocalc works fine for me, with the help of the above example.
If I made no mistake, Launch: 2023-04-05 Moon : 2024-08-19 Earth : 2024-08-20 Venus : 2025-08-31 Earth : 2026-09-28 Earth : 2029-01-17 JOI : 2031-07-21 (a year earlier than with the August 2023 launch trajectory) |
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Mar 16 2022, 04:08 PM
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#55
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
It's remarkable – almost comical – that after a quarter century, two missions are going to arrive for overlapping jovian system science at almost the same time. Now it looks like Europa Clipper will make a close pass of Europa before JUICE does but it's like watching a close horse race. And won't really matter; it'll be great to get the complementary science as both make observations with similar but non-identical instruments.
Interestingly, both missions' radar instruments have a mode at 9 MHz, which might make them a little less complementary than redundant in kind. Still, 46 radar tracks is better than 44. |
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Mar 16 2022, 05:48 PM
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#56
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Senior Member Group: Members Posts: 1585 Joined: 14-October 05 From: Vermont Member No.: 530 |
Would be nice if the continuing presence continued more places than LEO. At a minimum Mars and Jupiter. But one can easily dream of the rest.
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Mar 17 2022, 05:35 AM
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#57
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Member Group: Members Posts: 234 Joined: 14-January 22 Member No.: 9140 |
The inner jovian system has radiation to prohibit long lifetimes and the outer jovian system would exclude the targets of highest interest.
Future telescopes are going to have amazing resolution of Jupiter from Earth, so monitoring Jupiter from the vicinity of Callisto or farther wouldn't add much value, either. |
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Mar 17 2022, 11:47 PM
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#58
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IMG to PNG GOD Group: Moderator Posts: 2251 Joined: 19-February 04 From: Near fire and ice Member No.: 38 |
Future telescopes are going to have amazing resolution of Jupiter from Earth, so monitoring Jupiter from the vicinity of Callisto or farther wouldn't add much value, either. It's correct that future telescopes will have amazing resolution. However they will be busy observing many different targets and can observe Jupiter only occasionally (this is also true today for the largest groundbased telescopes). So observations by amateur astronomers (or a spacecraft imaging Jupiter from Callisto's orbit or farther out) are still going to be highly valuable because of their time resolution. And this is an updated ESA animation showing the JUICE trajectory and the dates of several major mission events: https://youtu.be/Fw17N3rdN7s |
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Mar 18 2022, 07:02 AM
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#59
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
And this is an updated ESA animation showing the JUICE trajectory and the dates of several major mission events: https://youtu.be/Fw17N3rdN7s I don't get it, as early as 9 March, ESA has posted a bunch of videos about JUICE's new trajectory on Youtube exclusively (what is questionable) without any press release or slightest hint about it on it's official websites or even JUICE's twitter account, what seems to be presently it's main outreach channel (what is even more questionable). It's certain that ESA's PR - or better said, it's information policy is badly flawed. |
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Mar 29 2022, 02:07 PM
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#60
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Member Group: Members Posts: 241 Joined: 28-October 12 Member No.: 6732 |
Finally the latest (much-anticipated) The Making of JUICE episode has been released.
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