Voyager Status, What is it? |
Voyager Status, What is it? |
Apr 23 2024, 03:39 AM
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#151
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Member Group: Members Posts: 447 Joined: 1-July 05 From: New York City Member No.: 424 |
Maybe you meant to post the link to today's blog post?
https://blogs.nasa.gov/voyager/2024/04/22/n...dates-to-earth/ |
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Apr 23 2024, 01:25 PM
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#152
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Yes, I did.
Incredible to think that they both might actually make it to their 50th anniversary... |
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Apr 23 2024, 06:13 PM
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#153
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Senior Member Group: Members Posts: 2922 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
Just learnt that Voyager I will be 1 light day from Earth on Nov 18th 2026
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May 16 2024, 08:29 PM
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#154
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Newbie Group: Members Posts: 19 Joined: 28-May 19 Member No.: 8607 |
Voyager 1 remains in engineering mode but it looks to me that science data is planned to resume Sunday 19th May. See FDS mode & data rate. https://voyager.jpl.nasa.gov/pdf/sfos2024pd..._06_03.sfos.pdf
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May 22 2024, 09:35 PM
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#155
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Senior Member Group: Members Posts: 2922 Joined: 14-February 06 From: Very close to the Pyrénées Mountains (France) Member No.: 682 |
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Jun 12 2024, 09:16 PM
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#156
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Member Group: Members Posts: 934 Joined: 4-September 06 From: Boston Member No.: 1102 |
Ed Stone, Former Director of JPL and Voyager Project Scientist, Dies. Link
https://d2pn8kiwq2w21t.cloudfront.net/origi...ager_model.webp Truly a great scientist. He will be missed. -------------------- |
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Jun 13 2024, 08:35 PM
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#157
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Newbie Group: Members Posts: 9 Joined: 13-August 23 Member No.: 9270 |
So the machine has now officially outlived the man. Incredible, yet sad
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Jun 15 2024, 08:09 PM
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#158
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Member Group: Members Posts: 447 Joined: 1-July 05 From: New York City Member No.: 424 |
The New York Times has put up its obituary for Ed Stone.
Gift link: https://www.nytimes.com/2024/06/14/science/...;smid=url-share My favorite part of this obituary is a link to a lengthy NYT Magazine Section profile of Stone written 34 years ago, which discusses how Stone “‘revolutionized the world of project science’” QUOTE His Head In The Stars But when it comes to running a space project, scientist Ed Stone has his feet on the ground. By Michael Norman, New York Times Magazine May 20, 1990 *** Modern science is usually big science, with apparatus so large and complex it takes teams of scholars and technical experts to make it work. Voyager at one point employed as many as 120 scientists. Ed Stone's leadership on that project has served as a paradigm for such big-science undertakings. With Voyager, Stone was the first director of spacecraft science to bring extensive scientific expertise to management. In doing so, he ''revolutionized the world of project science,'' in the opinion of his boss, Norman Haynes, who for three years was Voyager's overall project director. *** QUOTE FOR THE MOST PART, EXPERIMENTALISTS SUCH AS Ed Stone perform in relative obscurity. Their work is arcane and rarely attracts popular notice. Usually, they are part of a large enterprise, such as a space shot, where the significance of their labor is lost in the effort of the group. Often on space shots, teams come into conflict: a radio team might want one telemetry to measure a planet's mass while an imaging team wants another for high-resolution pictures. For many years - through the flights of Explorer, Ranger, Surveyor, Mariner and Viking - the scientific rivalries at the Jet Propulsion Lab often led to turf wars, personal feuds and shouting matches. ''It simply was chaos,'' said one lab official. On Voyager, too, teams formed around a variety of experiments - 11 in all, covering the general fields of radio science, ultraviolet astronomy, plasma-wave physics, infrared observation, imaging, cosmic rays, low-energy particles and magnetic fields. But instead of putting a professional administrator in charge of the Voyager teams, lab officials, in 1972, reached into the ranks and elevated Ed Stone, a cosmic-ray physicist, to be the project's chief scientist. ''Ed was a real scientist and not just someone filling a job slot,'' said Torrence V. Johnson, a member of Voyager's imaging team and now a head scientist himself, on Project Galileo. Stone had the right profile for the job. *** He was considered a scholar: ''If a question came up in a field he didn't know about, Ed would go home and read all the papers in that field, then come back the next day better informed than the so-called experts,'' said Johnson. And a workhorse as well: ''He was like this machine,'' recalls Norman Haynes. ''You'd wind him up and, zoom! He went zipping around all day getting things done.'' Most important, he found a way to end the feuding. He insisted on consensus. If a team wanted time on line during an encounter - and time was limited; Voyager spent just five days and five hours close to Neptune - a team leader not only had to persuade Stone his case was compelling, he had to win over his peers on the other teams as well. ''Ed would ask, 'Who's right scientifically?' '' Johnson said. In short, as Haynes has said, ''Ed Stone revolutionized the world of project science.'' *** QUOTE The process of science - forming a hypothesis, conducting the experiment, analyzing and interpreting the data, then offering it for a long period of peer review - often makes conservatives out of those who practice it. At first, Ed Stone had trouble convincing his cautious colleagues on the Voyager project that big science, publicly financed science, sometimes demands immediate results. ''I explained that in my mind we were observing nature as it displayed itself, not doing controlled lab experiments,'' he said. ''The public was paying for all this, we had to allow them to share what they are paying for.'' He wanted his principal investigators to speak at the daily news conferences during each encounter, even though they often were puzzled about much of the data they were collecting. Some felt Stone was advocating ''instant science,'' and, as Torrence Johnson remembers it, many of them ''had to be dragged kicking and screaming to the microphone.'' ''I told them,'' said Stone, ''you just have to be careful not to explain things you can't explain. Explain only what you think you really know. You say, 'Look, it's a mystery; we don't know what the data is telling us.' This was not the normal scientific process where things are worked over by peer review, but I felt with these encounters there was a real opportunity to share the whole scientific process in a compressed form and we should do it even if it meant violating some of the commonly accepted rules of how you do science.'' Gift link to the entire article: https://www.nytimes.com/1990/05/20/magazine...;smid=url-share |
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Jun 15 2024, 10:01 PM
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#159
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Member Group: Members Posts: 934 Joined: 4-September 06 From: Boston Member No.: 1102 |
Tom, many thanks for posting that and the links. In posting the NASA link on his passing, I had hoped that members of the forum would add additional links or comments.
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Jun 15 2024, 10:20 PM
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#160
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Tom, many thanks for posting that and the links. In posting the NASA link on his passing, I had hoped that members of the forum would add additional links or comments. Can't add much more than to say: watch the documentary I linked in March, if you haven't already (It's Quieter in the Twilight), and also The Farthest, from a few years earlier.... Ad astra, Ed! |
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Aug 21 2024, 03:19 PM
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#161
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
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Aug 22 2024, 04:44 AM
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#162
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
Everyone interested in the details needs to read the above. Confirmation that the other side of the FDS was totally bad... 3333 was written to every address and 333B comes out. Turns out lots of 333Bs came out after a poke.
And then a young priest and an old priest rewrote enough of the FDS instruction code on paper w/o a emulator to make it work again. |
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Aug 31 2024, 03:49 PM
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#163
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Member Group: Members Posts: 122 Joined: 26-June 04 From: Austria Member No.: 89 |
In the last days I checked via DSNOW that V1 was again in the 40b/s mode...I hope its not again a problem like we see already. Anyone aware of this ?
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Sep 11 2024, 03:10 AM
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#164
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Newbie Group: Members Posts: 19 Joined: 28-May 19 Member No.: 8607 |
Yes I had also noticed Voyager 1 had been in engineering mode 40bps for several days. Worried I asked a trusted source as to the reason and was told there was nothing to worry about and V1 would return to science mode shortly which she did on 3rd Sept I think. However I wasnt totally convinced and sadly this evening JPL has posted the reason. https://www.jpl.nasa.gov/news/voyager-1-tea...y-thruster-swap The TCM thrusters were probably pretty clear when they were swapped to in 2018. The fact that they are now totally clogged after 6 years must mean that swapping to the original thrusters which were already partly clogged, they will become totally clogged very quickly and life expectancy cant be very long. Sadly I think we are close to the end :-(
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