Talk:GPS satellite blocks

message: I believe this article will seriously detract from the Global Positioning System article, since satellites are the central component of GPS. You suggest migrating certain material from the GPS article to here, but it seems that would involve a majority of the material. The remaining material would be left without a context and would no longer make much sense.  Likewise, this new article would be not have the context of the receiver.  So both articles would be very weak.  The GPS article is very good the way it is. Why mess with a good thing? Roesser (talk) 04:55, 16 December 2007 (UTC)
replies: text: Please see the response to this at Talk:Global Positioning System#GPS satellite article. (sdsds - talk) 05:56, 16 December 2007 (UTC)
thread_title:  rational for article 

message: Should this article contain information about how many are in orbit?  How many of the deactivated units could be reactivated?  How many have been lost or destroyed?  I came here hoping to find answers to these questions.  —EncMstr (talk) 19:23, 30 January 2012 (UTC)
thread_title:  number and life 

message: The article, as is, seems to be missing most of the drama about the several iterations in design and operational satellites at the GPS III level, that is GPS IIIA, GPS IIIB, and GPS IIIC.  Personally, I know little about it, and am not expert on where to find sources.
But there is this, here:
"GPS IIIB is pretty much dead.
"If 12 GPS IIIA are ordered, and those have to be ordered/built/launched fairly quickly to satisfy the semi codeless sunset provisions, then there will be 24 operational L5 GPS birds, 31 L2C/M-Code capable and the core of the constellation will be 7 IIR-M, 12 IIF, 12 IIIA, but 12 IIR still available, OCX is claimed to be able to control 36 GPS sats, so 5 IIR might be kept healthy another 7 in residual. That's a lot of birds, perhaps enough to last 10 years without launches. Unless IIR / IIR-M last less than IIA, 10 years without launches would be not only possible but likely.
The most recent mention of GPS IIIB is from 2011 when the CBO recommended killing IIIB after the LockMart finished the requirements for that phase (back then IIIB and IIIC were planned).
Notice there are still 2 IIA operational and at least a half a dozen IIA residuals that could still be pressed into service if necessary.
"The undocumented quirk about demand for new GPS birds is they assume satellites will last only their official mission assurance, but in reality they last 3x as much (GPS IIA) from 7.8 years assurance to average over 20 years. IIR are assured to last 12 years, what if they last 30+ years on average ? Is the DoD ready to dispose GPS birds if their only flaw is they are outdated ? The oldest IIR launch was 1997, so 30 year life would translate to 2027, with the youngest launched in 2009, lasting until 2039!
Now we cant use that, as it is not a reliable source for Wikipedia purposes.  But it does point to some material interested editors might want to look into so we can improve the GPS satellite blocks article on Wikipedia.  Cheers.  N2e (talk) 14:08, 10 October 2015 (UTC)
thread_title:  Article needs updated 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: I assume that all the Block I, II etc satellits are still in orbit even if they are not working any more. Is this true? How long will the satellit stay up at this orbit? Longer than 1000ys?
This picture states that it's more than 100000 years.
Schrauber5 (talk) 12:19, 29 December 2021 (UTC)
thread_title:  Satellits out of order 

message: Nickel–hydrogen battery redlinks to Navigation technology satellite-2. Gunter's Space Page says NTS-2 was the first Navstar block1 satellite. Should that link be amended to that effect (to the block 1 section here)?  Were other early Navstar satellites also designated NTS? Was NTS-2's predecessor NTS-1 considered a Navstar satellite, or is it a short-lived technology demonstrator?  Should NTS-1 and NTS-2 be explicitly mentioned in Global Positioning System#development? -- Finlay McWalter··–·Talk 14:15, 18 July 2023 (UTC)
thread_title:  NTS-2