Yes, and the 10th Block IIF is 4 days from launch.
We can expect there to take some time before it is brought into the
constallation.
It's only with Block III that we can expect this extended set of PRN
codes to be supported and used.
Cheers,
Magnus
On 07/10/2015 03:23 PM, Azelio Boriani wrote:
From <http://www.gps.gov/systems/gps/space/>
Block IIA: 3 operational
Block IIR and IIR(M): 19 operational
Block IIF: 9 operational
so they should be 31 satellites working.
On Fri, Jul 10, 2015 at 7:20 AM, Magnus Danielson
<[email protected]> wrote:
Well, you would think so...
There is 37 PRN codes, of which the top 5 is for testing.
However, in the modern ICD:
http://www.gps.gov/technical/icwg/IS-GPS-200H.pdf
you will find that there is an extended set of PRN codes, and for the C/A
code the modulation is the same, just that the transmitted PRN is shifted.
This extended system can hold 64 active birds in the constellation.
Cheers,
Magnus
On 07/10/2015 03:19 AM, Mark Sims wrote:
The GPS system is pretty much limited to 32 active satellites. There are
currently 29 satellites broadcasting usable navigation data. Plus some
WAAS signals from geosynchronous orbit.
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