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Thread: SpaceX

  1. #3721
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    Starship SN-08 flight test infographic from artist Tony Bela

    Site: http://www.tonybela.com/

    HiRes version,
    http://www.tonybela.com/SN8 pre launch.jpg

    LowerRes,
    IMG_20201101_042752.jpg

  2. #3722
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    Confirmation Starship targets the drink then diverts to the landing pad,

    Thomas Burghardt @TGMetsFan98
    Elon confirms that, like Falcon 9, Starship SN8 will target the water until the last second. Hopefully this means no crater at the landing pad!
    |
    Elon Musk ✓ @elonmusk
    Replying to @TGMetsFan98 @KlotzAdam and 2 others
    Yeah. Although, if it fails right at the end, some landing pad repair will be needed to fill in the crater.

    https://twitter.com/TGMetsFan98/stat...62613432606728

  3. #3723
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    I'm glad to see this pioneering "fail fast" spirit -minus the risk of limb and life- having returned to spaceflight. Let them glow, let them blow, until you get it right. I believe the ability to have "cheap" tests is one of the key factors in avoiding a development path that takes decades.
    With sufficient thrust, water towers fly just fine.

  4. #3724
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    SN-09 looks to be a fast follower if SN-08 goes wonky, getting her wings this weekend.

  5. #3725
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    Quote Originally Posted by docmordrid View Post
    Starship SN-08 flight test infographic from artist Tony Bela

    Site: http://www.tonybela.com/

    HiRes version,
    http://www.tonybela.com/SN8 pre launch.jpg

    LowerRes,
    IMG_20201101_042752.jpg
    Cool graphic, but I wish there was a size between the lo-res and the big one!
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  6. #3726
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    Gimme a width number

    Starship 'Chomper' StarLink launch (this video received the Elon Musk Seal of Approval)

    https://youtu.be/ZDXazpbe2Iw


    Building a Starship

    https://youtu.be/mdoXiwKiRpU

  7. #3727
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    Not SpaceX, but something of an answer to my earlier question about cell phones, there is a company looking to provide cell service from satellites. However, NASA has major concerns about where they want to put them, due to collision risk. Story here, includes some details about design. They need large antennas of course, but would be in a bit higher altitude than Starlink. One way or another, I expect the idea that cell phones are limited regionally will go away one of these days.

    https://arstechnica.com/science/2020...phic-collison/

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

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  8. #3728
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    And another arstechnica article, about someone unboxing Starlink hardware and his beta test experience, with good internet access in a national forest:

    https://arstechnica.com/information-...-gets-120mbps/

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

    The Leif Ericson Cruiser

  9. #3729
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    SN-10 propulsion module stacked

    https://youtu.be/vSDaKHAHOWA

  10. #3730
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    Quote Originally Posted by docmordrid View Post
    Gimme a width number.
    Oh! Download and resize it! I can do that!
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  11. #3731
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    How come you can get good Starlink connection in a forest, but GPS reception tends to drop out underneath trees? Different frequency, better ground hardware?
    With sufficient thrust, water towers fly just fine.

  12. #3732
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    Quote Originally Posted by Nicolas View Post
    How come you can get good Starlink connection in a forest, but GPS reception tends to drop out underneath trees? Different frequency, better ground hardware?
    550 km (StarLink) vs 20,200 km (GPS) + better ground equipment (.5m phased array vs pocket device.)

  13. #3733
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    How come you can get good Starlink connection in a forest, but GPS reception tends to drop out underneath trees? Different frequency, better ground hardware?
    With sufficient thrust, water towers fly just fine.

  14. #3734
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    The guy testing Starlink did say a clear view was important. He was in a forest, but apparently looked for a spot that had a view of the part of the sky he was aiming at.

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

    The Leif Ericson Cruiser

  15. #3735
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    Quote Originally Posted by Nicolas View Post
    How come you can get good Starlink connection in a forest, but GPS reception tends to drop out underneath trees? Different frequency, better ground hardware?
    30-40 times shorter distance, so 900-1600 times the received power per cross section for a given transmit power, a half meter diameter phased array on the ground side instead of a little chip or whip antenna, about double the transmit power on the satellite side and another big phased array so it's targeted at the ground terminal instead of spread across the planet...in short, a million or so times as much power to work with, plus or minus a couple orders of magnitude.

  16. #3736
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    From the article linked earlier:

    ‘Wandering-coder did a speed test that measured downloads of 120Mbps, uploads of 12Mbps, and latency of 37ms. He got worse results in a different, more heavily forested location where he placed the dish closer to the trees because Starlink needs a clear line of sight to SpaceX satellites. "It didn't work well with a heavy tree canopy/trees directly in the line of sight, as expected," Wandering-coder wrote. "I would be connected only for about 5 seconds at a time. Make sure you have as clear a view of the sky as possible!"’

    So better signal strength or not, line of sight obstruction was an important issue.

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

    The Leif Ericson Cruiser

  17. #3737
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    SN-08,

    Static fire: November 4, 2020
    Window: 1000 - 0000 Eastern*

    Cryotest last night
    https://twitter.com/austinbarnard45/...66068549574657

  18. #3738
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    Thanks for the replies! The size of the user terminal antenna makes it a bit less handy to carry around on a hiking trip.
    With sufficient thrust, water towers fly just fine.

  19. #3739
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    At Boca Chica, Musk said StarLink should have worldwide coverage by the end of 2021 including the poles.

    After that it's increasing capacity, deploying the laser inter-satellite links, etc .

  20. #3740
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    Pranay Pathole@ PPathole
    Also $499 for the phased array terminal is really cheap, the components/electronics to build and run it are expensive. The Starlink engineers have a done a great job in keeping the price low and affordable
    |
    Elon Musk ✓ @elonmusk
    Lowering Starlink terminal cost, which may sound rather pedestrian, is actually our most difficult technical challenge

    https://twitter.com/elonmusk/status/1323431066158452736

  21. #3741
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    Quote Originally Posted by Nicolas View Post
    Thanks for the replies! The size of the user terminal antenna makes it a bit less handy to carry around on a hiking trip.
    Sure, the antenna was originally described as pizza sized, and it is a pretty good sized pizza. You would also need to consider the power supply. I might imagine a future foldable antenna and built-in router for future more portable use, but mostly this is too bulky to carry very far by a person.

    It also looks like they would need to make changes to make it easier to be able to install it in the roof of a car/SUV/truck.

    But as long as the cost isn’t too high after beta, I can see this making a big difference for people in out of the way places.

    "The problem with quotes on the Internet is that it is hard to verify their authenticity." — Abraham Lincoln

    I say there is an invisible elf in my backyard. How do you prove that I am wrong?

    The Leif Ericson Cruiser

  22. #3742
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    Boca Chica road closures

    Primary Date: Nov. 9, 2020
    Secondary Dates: Nov. 10 & 11, 2020
    Window: 0900 - 2100 Eastern
    Purpose: SN8 Static Fire and 15km Flight

    https://twitter.com/bocaroad/status/1324139938732859392

  23. #3743
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    Quote Originally Posted by Van Rijn View Post
    Sure, the antenna was originally described as pizza sized, and it is a pretty good sized pizza. You would also need to consider the power supply. I might imagine a future foldable antenna and built-in router for future more portable use, but mostly this is too bulky to carry very far by a person.

    It also looks like they would need to make changes to make it easier to be able to install it in the roof of a car/SUV/truck.

    But as long as the cost isn’t too high after beta, I can see this making a big difference for people in out of the way places.
    Oh sure. These days if you want a "cabin in the woods" you can go very far with solar panels and Starlink. Then it's "just" water to take care of.
    With sufficient thrust, water towers fly just fine.

  24. #3744
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    Clean launch tonight, which means Crew-1 should be good to go on the 14th

  25. #3745
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    I worked later than usual last night and it was already full dark when I rode home from the office. As I turned into my neighborhood, facing North, I saw a bright streak of light low on the horizon, visibly moving, climbing towards the East. For an instant I wondered WTF(?), then the obvious, ahhh F9 launch. I'd forgotten about it. I pulled to the side of the road and watched. Perfect sky. Clearly saw MECO and 2nd stage ignition with the naked eye. The best launch, viewing-wise, I've seen from my location in a long time. Maybe ever.

  26. #3746
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    Quote Originally Posted by Darrell View Post
    I worked later than usual last night and it was already full dark when I rode home from the office. As I turned into my neighborhood, facing North, I saw a bright streak of light low on the horizon, visibly moving, climbing towards the East. For an instant I wondered WTF(?), then the obvious, ahhh F9 launch. I'd forgotten about it. I pulled to the side of the road and watched. Perfect sky. Clearly saw MECO and 2nd stage ignition with the naked eye. The best launch, viewing-wise, I've seen from my location in a long time. Maybe ever.
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  27. #3747
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    SN-08 test schedule (moved right)

    Primary Date 1: November 8, 2020
    Window: 2000 - 0200 Eastern

    Primary Date 2: November 12, 2020
    Purpose: static fire & 15km flight
    Window: 1000 - 1000 Eastern

    Backup Date: November 13, 2020
    Purpose: static fire & 15km flight
    Window: 0600 - 1300 Eastern

  28. #3748
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    Starlink on civil aircraft?

    SpaceX just filed papers with the FCC,

    ...SpaceX seeks experimental authority for operation of one user terminal aboard each of up to five private jets while they are (1) on the ground at an airport, and (2) in flight over the United States (including its territories and territorial waters). Such authority would enable SpaceX to obtain critical data regarding the operational performance of its user terminals and the SpaceX NGSO system more broadly...

  29. #3749
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    Raptor startup video (cutaway)

    https://youtu.be/QCwN00ozWa8

  30. #3750
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    Sentinel-6A 'Michael Freilich,' an oceanographic satellite for NASA and ESA

    Named after the late US oceanographer and former NASA Earth Sciences Director

    Date: November 21, 2020
    Time: 1217 Eastern (0917 Pacific, 1717 GMT)
    Booster: B1063.1
    Mass: ~1,500 kg
    Orbit: 1,336 km @66° inclination
    Pad: SLC-4E, Vandenberg
    Recovery: LZ-4

    https://twitter.com/KathyLueders/sta...72868526698496

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