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Sadly, Navstar satellites are synchronised, so the number of channels are irrelevant for downloading ephemeris and almanac data.
Yes and no. The data is the same, but the TTFB of the data can be massivly reduced. Multi channel is used as a method for shortening the time to 30 s to 3 min. The mathematicians at the chip designers do the rest of the improvement.
Sadly, Navstar satellites are synchronised, so the number of channels are irrelevant for downloading ephemeris and almanac data.