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  1. #3701
    Guest Member S Landreth's Avatar
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    I would be happier to see something above 80%




    Meteorologists with the U.S. Space Force Space Launch Delta 45 predict a 60% chance of favorable weather conditions for an Artemis I launch attempt during a two-hour window that opens at 2:17 p.m. EDT Saturday, Sept. 3. While rain showers are expected in the area, they are predicted to be sporadic during the launch window.

    Today, engineers are implementing plans approved at yesterday’s mission management team meeting to address issues that arose during a launch attempt Aug. 29. The mission management team will reconvene Thursday, Sept. 1 to review data and overall readiness — NASA subsequently will hold a status update at 6 p.m. EDT.

    The countdown for launch is scheduled to resume Saturday at 4:37 a.m., at the L-9 hour, 40 minutes planned hold in the countdown where managers receive a weather briefing and conduct a poll on whether to proceed with propellant loading operations. Launch controllers do not need to begin the initial 46 hour, 10 minute countdown again because many of the configurations needed for launch are already in place.

    On Saturday, live coverage of tanking operations with commentary on NASA TV will begin at 5:45 a.m. EDT. Full launch coverage in English will begin at 12:15 p.m. and NASA en espanol broadcast coverage will begin at 1 p.m. EDT.

    Click here for the latest information on launch briefings and events.
    Last edited by S Landreth; 01-09-2022 at 09:03 AM.
    Keep your friends close and your enemies closer.

  2. #3702
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    80% would be better. But 60% is not bad.

    I am much more concerned if SLS will be ready and the same problems don't pop up again.

  3. #3703
    Guest Member S Landreth's Avatar
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    ^The work is behind us, she said. Wish them luck

    The Artemis 1 team also looked at several other issues that cropped up during Monday's countdown, including a slight hydrogen leak and a crack in the foam that's part of the SLS core stage's thermal protection system. The leak has been fixed, team members said this evening. And the foam crack requires just "incremental risk acceptance," as does the engine sensor issue.

    "There's no guarantee that we're going to get off on Saturday, but we're gonna try," Artemis mission manager Mike Sarafin said during a news conference this evening.

    Artemis 1 moon mission is 'go' for Saturday launch, NASA says | Space

    Where things stand.

    NASA holds news briefing on upcoming Artemis launch




    NASA Names John Honeycutt Space Launch System Program Manager | NASA
    Last edited by S Landreth; 02-09-2022 at 08:55 AM.

  4. #3704
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    The launch will be about 1 AM Sunday Bangkok time.

    That phrase "incremental risk acceptance," is not filling me with enthusiasm. At this point I think that Spacex's Starship has a very good chance of reaching orbit first.

  5. #3705
    Thailand Expat DrWilly's Avatar
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    Quote Originally Posted by qwerty View Post
    That phrase "incremental risk acceptance," is not filling me with enthusiasm.
    And imagine using that phrase on Artemis 2 or 3 when they have people on board...

  6. #3706
    Making people dance. :-)
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    Quote Originally Posted by DrWilly View Post
    And imagine using that phrase on Artemis 2 or 3 when they have people on board...
    America.

    Would probably just call them collateral damage.

  7. #3707
    Guest Member S Landreth's Avatar
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    in 14 hours

    Another briefing




    "I do not expect weather to be a showstopper by any means for either launch window," launch weather officer Melody Lovin of the U.S. Space Force's Space Launch Delta 45, told reporters in a press conference here today.

    NASA has powered up the 322-foot-tall (98 meters) SLS rocket and its Orion capsule for the Saturday launch attempt and all systems look good leading into the final countdown, according to Jeremy Parsons, NASA's deputy manager of exploration ground systems.


    • NASA's new Moon rocket set for launch Saturday after delay


    What's happening: The two-hour launch window for the SLS opens at 2:17pm ET on Saturday from the Kennedy Space Center in Florida.


    • Once it launches, the SLS is expected to send the uncrewed Orion capsule on a journey around the Moon before the spacecraft comes back to Earth for a splashdown in the Pacific Ocean about 40 days later.
    • NASA will air live coverageof the launch via NASA TV. https://www.axios.com/2022/09/02/nas...turday-artemis





  8. #3708
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    Scrubbed, hydrogen leak....

  9. #3709
    Making people dance. :-)
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    Haven't seen such a cocktease since TC in his charcoal checkered number.

  10. #3710
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    Quote Originally Posted by Edmond View Post
    Haven't seen such a cocktease since TC in his charcoal checkered number.
    The third time is the charm, he said, in his non methane leaking manner....

  11. #3711
    Guest Member S Landreth's Avatar
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    NASA won't try to launch the Artemis 1 moon mission again for at least a few weeks

    "We do not launch until we think it's right," Nelson said. "These teams have labored over that and that is the conclusion they came to. I look at this as part of our space program, in which safety is the top of the list."

    NASA Administrator Bill Nelson reminded that the shuttle was sent back to the Vehicle Assembly Building 20 times before it launched -- and noted that the cost of two scrubs is a lot less than a failure.

    NASA engineers repeatedly tried to staunch the fuel leak during the Artemis 1 countdown. First, they tried to warm the tank connector and chill it with cold fuel to reseat the hydrogen quick disconnect connector. Next, engineers tried to repressurize it with helium, and then returned to the warm-and-chill method to stop the leak. All three attempts failed.


    Launch periods: https://www.nasa.gov/sites/default/f...ty_aug2022.pdf
    Last edited by S Landreth; 04-09-2022 at 07:48 AM.

  12. #3712
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    NASA news update after abort on saturday.

    From the SpaceLaunchSystem reddit:

    Summary of "Artemis 1 Launch Attempt News Update (Sept. 3)" : SpaceLaunchSystem

    Summary of "Artemis 1 Launch Attempt News Update (Sept. 3)"

    After the failed attempt to launch Artemis 1 today, NASA held a news update. Here's what they said:


    Today, a launch attempt was waived off due to a liquid hydrogen leak.
    The shuttle was sent back to the VAB 20 times, and NASA will not launch until everything is exactly right. Safety is ALWAYS first.
    NASA will not launch in this period, meaning no launch before Tuesday.
    The soonest NASA could launch is NET September 19th.
    NASA will also have to ensure they do not overlap with Crew 5.
    The next 2 launch window periods will be September 19 - October 4 (excluding Sep. 29-30), and October 17-31 (excluding Oct. 24-28).
    Prior to loading, the line that had the leak was inadvertently over-pressurized to 60 pounds per sq in (while it should be 20 pounds per sq in), which could have caused the major leak, but it's too early to tell.
    The leak in question was not nearly as major on Monday but was still small and existent.
    The vehicle is drained.
    To fix the leak, teams plan to fully replace the soft goods within the line. Rolling back to the VAB will depend upon discussions with the range to get an extension.
    Teams will follow up next week after considering options with a schedule.
    Teams are also looking at the chill-down procedure to see if additional precautions can be added.
    EDIT: Inside sources state that rollback to the VAB is likely and we will likely not see a launch before October.

  13. #3713
    Thailand Expat misskit's Avatar
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    NASA will crash a spacecraft into a 525-foot-wide asteroid in September. Here's how to watch it.


    NASA is preparing for an "Armageddon"-like mission of crashing a spacecraft into an asteroid, and it wants the public to watch live.


    Asteroids frequently get close to striking Earth, but it has been more than 65 million years since a catastrophic collision with our planet. There has been renewed interest in objects hurtling toward us since the popularity of the 2021 doomsday comedy "Don’t Look Up."


    NASA will test its plan in case the scenario ever actually plays out.


    The space agency's Double Asteroid Redirection Test, or DART, will crash into the asteroid Dimorphos, which orbits a larger asteroid named Didymos, next month. Scientists say neither asteroid is headed toward Earth, but Dimorphos, an estimated 520 feet long, is an asteroid that could cause significant damage if it were to hit Earth, NASA says.

    Regardless of the outcome, the mission will give astronomers and scientists important data on what the response would be if an asteroid is on a collision course with Earth. No threat exists now, scientists say.


    "We don't want to be in a situation where an asteroid is headed toward Earth and then have to be testing this kind of capability. We want to know about both how the spacecraft works and what the reaction will be ... before we ever get in a situation like that," Lindley Johnson, planetary defense officer for NASA, said in November.


    When will DART hit the asteroid Dimorphos?


    DART will complete its 10-month journey through space on Sept. 26 at 7:14 p.m. ET. NASA's live coverage will begin at 6 p.m. ET.

    NASA to soon crash DART into an asteroid. Here's how to see it.

  14. #3714
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    ^ Cool

  15. #3715
    Thailand Expat DrWilly's Avatar
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    Quote Originally Posted by Topper View Post
    ^ Cool
    Not for the citizens of Dimorphos.

  16. #3716
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    Quote Originally Posted by DrWilly View Post
    dafuc????

    If an asteroid threatening to impact Earth is detected early, it can be intercepted early, far out. In this case just a miniscule change of trajectory can make it miss Earth. It all depends on a good survey to detect them years ahead.

    The real threat are comets from the outer solar system. They can randomly be thrown to the inner planets and may come as a complete surprise. That's very rare but if it happens, very hard to deflect because there is little time.

    DART is a test of the first scenario. They target a binary asteroid. One with a small companion orbiting it. NASA just targets the smaller companion. It would have a measurable effect with a small missile. No explosives, just impact. A single large asteroid will need a bigger missile, but still manageable with enough time.
    "don't attribute to malice what can be adequately explained by incompetence"

  17. #3717
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    NASA has decided to try and fix the hydrogen leak of SLS on the pad. I put the emphasis on "try". There is another imitation though. The batteries driving the self destruct safety system are expiring. NASA wants to convince the range authorities (space force, I understand) to agree to an extension. But it has been extended before and it is by no means clear the range will agree. Fixing this will again require moving SLS back to the assembly building.

    If NASA can keep SLS on the pad, they may launch end of this month, assuming no fresh problems and the hydrogen leak is indeed fixed. If not, more delays.

    Quote Originally Posted by Takeovers View Post
    I learned about the mission plan only now. I had thought of a lunar orbit as something less complicated.



    Figure 4: Example Artemis-I Mission (Earth-Moon Two-Body Rotating Pulsating Frame).
    Here another projection of the same trajectory, more like we expect the trajectory to be. Specialists say the above is the more precise. People like me can understand the below better.

    Space News thread-moon_media_kit_page_45_image_0002-1024x576-png

  18. #3718
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    Some info on the planned Moon lander.

    https://twitter.com/sciguyspace/stat...72006231035904

    Space News thread-hls-moon-lander-jpg

  19. #3719
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    Blue Origin had a successful failure today with their resupply mission .... the abort system appears to have worked.


  20. #3720
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    Quote Originally Posted by Topper View Post
    with their resupply mission
    Minor nitpick. New Shepard does not resupply anything. It barely reaches 100km right up and back down. Not attempting to reach any orbit.

  21. #3721
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    not sure the headline is right...

    Nasa’s Webb telescope could be drastically wrong, experts say

    If they don’t update their models to match the accuracy of the Webb Telescope’s optics, scientists say, they could miss or misconstrue major discoveries in planetary science

    When it comes to studying alien worlds, the James Webb Space Telescope could be drastically wrong, though not for any fault of its own.

    That’s the finding of a new study by researchers who looked not at the Webb telescope’s optics, but at the models scientists use to interpret the findings after the telescope has made an observation.

    Specifically, the models scientists use to understand opacity, how easily light passes through an atmosphere, are not accurate enough, according to MIT graduate student Prajwal Niraula, a co-author on a new paper published Thursday in Nature Astronomy. And since Webb studies exoplanets — planets around stars other than our Sun – by measuring the wavelengths of light that pass through a planet’s atmosphere using its spectroscopy instrument, the less accurate models could mean Webb telescope observations are off from reality by an order of magnitude.

    more

    https://www.independent.co.uk/space/nasa-webb-telescope-images-wrong-b2168536.html

  22. #3722
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    Quote Originally Posted by Takeovers View Post
    Minor nitpick. New Shepard does not resupply anything.
    That's what I thought, I thought it was a tourist thing.

  23. #3723
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    Quote Originally Posted by Topper View Post
    I thought it was a tourist thing.
    Previous flights were tourist flights. This flight had some science cargo. Some tests requiring a few minutes of microgravity, don't know any details.

  24. #3724
    Guest Member S Landreth's Avatar
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    NASA is postponing its scheduled Tuesday launch of its Space Launch System rocket for the Artemis I mission as a tropical storm moves toward the coast of Florida.

    The space agency announced the delay in a statement after team members held a meeting Saturday.

    Officials will continue to watch the weather forecast coming with Tropical Storm Ian, which is expected to hit Florida as a major hurricane next week, and are preparing for a rollback, in which the rocket would be taken off the launch platform to the vehicle assembly building.

    The delay is the third for the Artemis I mission that will see an unmanned spacecraft orbit the moon as the first step in a multiyear program through which people return to the moon’s surface for the first time in half a century.

    NASA delayed the launch first in late August and again earlier this month following technical problems. One of the rocket’s engines failed to condition to the correct temperature before the planned Aug. 29 launch, and engineers were unable to resolve a liquid hydrogen leak on Sept. 3.

    NASA said in its statement that engineers will make a final decision about the rollback on Sunday to allow them to receive additional data. The statement said the agency is taking a “step-wise approach” to allow it to protect its employees while also preserving the option to move forward with another launch opportunity if the weather improves.

    The agency previously announced after the two failed attempts that it would not try again until repairs were completed, which could take until October.

    NASA Administrator Bill Nelson said at a press conference earlier this month, “We’re not going to launch until it’s right.”

    Ian







    The last picture I posted will update by itself so you will not see anything during the evening hours
    Last edited by S Landreth; 25-09-2022 at 04:48 AM.

  25. #3725
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    Quote Originally Posted by S Landreth View Post
    NASA is postponing its scheduled Tuesday launch of its Space Launch System rocket for the Artemis I mission as a tropical storm moves toward the coast of Florida.

    The space agency announced the delay in a statement after team members held a meeting Saturday.

    Officials will continue to watch the weather forecast coming with Tropical Storm Ian, which is expected to hit Florida as a major hurricane next week, and are preparing for a rollback, in which the rocket would be taken off the launch platform to the vehicle assembly building.
    NASA cancels Artemis I launch attempt but delays roll back decision | Ars Technica

    An article by Eric Berger on arstechnica about the issue. On sunday there needs to be a decision on how to proceed. Probably a rollback to the VAB, the building NASA built for assembling the Saturn V Moon rockets. For protecting SLS from the storm and for doing some urgent maintenance.

    Even more interesting than the article are the comments. Usually there are a few people with a lot of knowledge there. Seems there are issues with the gigantic crawler, that's why they have not yet decided for roll back though there are many reasons for it.

    One commenter said, best possible outcome, the crawler gets stuck on the way back to the VAB and the storm blows over the Artemis 1 SLS. I am an optimist but I don't think we can be that lucky.

    Problems with SLS components already beyond their intended life time are increasing. That's why NASA wants to get SLS off to launch at any cost and risk. They declared the recent tanking test a success, when it really wasn't. If they can't launch now, by Oct. 1 or 2, there is even the possibility mentioned by commenters that they may have to scrap Artemis 1 completely.

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