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SpaceX Falcon 9 Block 4 - Iridium Next 21-30 - SLC-4E

Discussion in 'SpaceX' started by Grendal, Aug 25, 2017.

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  1. Grendal

    Grendal Active Member

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    #1 Grendal, Aug 25, 2017
    Last edited by a moderator: Oct 9, 2017
    Launch Date: NET October 4
    Launch time: 1306 GMT (9:06 a.m. EDT; 6:06 a.m. PDT)
    Launch site: SLC-4E, Vandenberg Air Force Base, California

    A SpaceX Falcon 9 rocket will launch 10 satellites for the Iridium next mobile communications fleet. This is the third out of eight launches for Iridium. An additional launch may occur due to failure of a number of the satellites already launched.

    This will be another ASDS landing attempt on JRTI as with all of the Iridium launches. All the current Iridium launches are contracted for new rockets. If there is an additional launch necessary, I would almost expect Iridium to use a previously flown booster to lower costs.

    Iridium satellite constellation - Wikipedia

    Matt Desch on Twitter
    Formosat-5 now off “our” pad. @SpaceX informs us they need a few more days, so our L3 now Oct 4, 6:06am local. Ship 1st 2 sats tomorrow!
    Click to expand...​
    This will be SpaceX's 14th launch of the year.
     
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  2. mkjayakumar

    mkjayakumar Active Member

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    Wow.. since the satellites from a single launch are all released one after the other and follow the same trajectory with more or less equid distance between them, if they lose a few how will they fill those specific slots that failed?
     
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  3. drees

    drees Active Member

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    #3 drees, Aug 25, 2017
    Last edited: Aug 25, 2017
    Any more information on these failures? That's the first I've heard of any failures of the NEXT satellites.

    Edit: Some websites one can use to watch Iridium satellite status:
    Iridium Constellation Status
    Iridium in Space - Iridium.online
    Stuff in Space (more than just Iridium, you can see SpaceX boosters still floating around - 5 from this year still up according to the site)

    Shifting satellites between spots in the same plane is easy - just lower the orbit of the satellite, wait until it catches up to the right spot, then raise it back up again.

    Shifting satellites between planes is harder - you have to change the inclination and wait until the satellite drifts over far enough, then straighten it back out again.
     
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  4. Grendal

    Grendal Active Member

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    Wow. It looks like I have made an error. I am mixing up the new Iridium Next with the older Iridium satellites which have had a few failures. From Wiki:
    In reading an article on that I incorrectly thought it was failures of these new satellites.

    Thanks for spotting the error and allowing me to correct the bad data.
     
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  5. e-FTW

    e-FTW New electron smell

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    Whoa, this is an awesome site! I may spend the evening there, looking at numbers change... :)
    Are those second stages? I have to think so.
     
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  6. Grendal

    Grendal Active Member

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    It does take a while for some of the second stages to de-orbit. In some cases a couple years from what I've picked up.

    Agreed that is an awesome site. Thanks for sharing Drees.
     
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  7. e-FTW

    e-FTW New electron smell

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    And do they fully burn up, or did they calculate that those de-orbits would fall into the ocean? If it is the latter, man do I suck at math compared to those folks... I can barely calculate a tip.
     
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  8. dhanson865

    dhanson865 Active Member

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    if they ever do.

    * Falcon 1 from 2008 still up there (Ratsat, or DemoSat, was a 165-kilogram non-functional boilerplate spacecraft used as a mass simulator on the fourth flight of the Falcon 1 rocket.)
    * Falcon 1 from 2009 still up there (On 14 July 2009, Falcon 1 made its final flight and successfully delivered the Malaysian RazakSAT satellite to orbit on SpaceX's first commercial launch)
    * Falcon 9 from 2010 still up there

    and so on totaling 12 falcon 9 bodies and 2 falcon 1 bodies if I counted right.

    Stuff in Space - http://stuffin.space/?intldes=2013-055G&search=falcon
     
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  9. oneday

    oneday Member

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    No idea if this will effect SpaceX launch but I figure it was relevant since it's a Vandenberg launch.

    "

    Media Update: ULA Atlas V NROL-42 Launch
    (Vandenberg Air Force Base, Calif., Sept. 8, 2017) - The ULA Atlas V carrying the NROL-42 mission scheduled for Sept. 14 from Vandenberg Air Force Base has been postponed. The launch vehicle and spacecraft are healthy and secure at Space Launch Complex-3.
    The decision to delay launch is based on the current forecasting for Hurricane Irma. Some critical members of the ULA launch team that support launch on both coasts are returning to Florida due to the threat from Hurricane Irma which is currently forecast to impact the Cape Canaveral area early Monday morning. The safety of our employees and their families are at the forefront of this decision. Hurricane preparations and hardware securing are underway at Cape Canaveral Air Force Station in Florida. A new launch date for the NROL-42 mission will be determined once the impacts of the storm are understood."
     
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  10. Grendal

    Grendal Active Member

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    Along these lines:

    Jonathan McDowell on Twitter

     
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  11. Grendal

    Grendal Active Member

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    Back to the topic of this thread:

    Matt Desch on Twitter

     
  12. Grendal

    Grendal Active Member

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    #12 Grendal, Sep 24, 2017
    Last edited: Sep 24, 2017
    SES-11 has been delayed making this the 14th launch of the year again. Also, this will be a Block 4 booster. This is the third Block 4 used and hopefully recovered. If successful, this will be the 16th recovered booster.
     
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  13. Grendal

    Grendal Active Member

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    Ring around the Rosey...

    Iridium is also delayed.

    Now targeting a launch of:

    Launch Date: Oct. 9th - Monday
    Launch time: 1237 GMT (8:37 a.m. EDT; 5:37 a.m. PDT)

    So SES will be a sunset launch and Iridium will be a sunrise launch.

    So Iridium is again the 15th launch for SpaceX and SES-11 is now the 14th.

    Unless something happens from the static fires or prep work then both of these dates should be pretty solid.
     
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  14. Grendal

    Grendal Active Member

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    The stack is prepped and ready to go:
    iridium3-stack2.jpg
     
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  15. miimura

    miimura Active Member

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    I must be missing something. How is that a stack of 10 satellites?
     
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  16. Grendal

    Grendal Active Member

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    It's pentagonal? Five in the top and five in the bottom...
     
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  17. miimura

    miimura Active Member

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    That would be a solution, but that's not what I'm seeing in that picture. The sides facing the camera look perpendicular.
     
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  18. dhanson865

    dhanson865 Active Member

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    #18 dhanson865, Oct 4, 2017
    Last edited: Oct 4, 2017
    doesn't look that way to me, I'd say it is 5 sided x 2

    edit: how about this view

    [​IMG]
     
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  19. Grendal

    Grendal Active Member

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    I'm pretty sure the dispenser is made specifically for Iridium. So a blank would not make much sense.

    Here is a picture that might clear it up a bit:
    irdium setup.jpg

    The shape of the one on its side sure looks like it part of a five sided structure. The sides are not at a 45 degree angle.
     
  20. dhanson865

    dhanson865 Active Member

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    Yeah, I edited that part back out after finding the stacking picture I edited in.

    I don't think your picture with only one mounted helps as the visual difference between a 36 degree and 45 degree angle on something like that is hard to eyeball without a reference.
     

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