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

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

  1. Grendal

    Grendal Active Member

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    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
    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 at 9:22 PM
    Last edited: Sep 24, 2017 at 9:33 PM
    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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