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Global Positioning System says the satellites have atomic clocks, and atomic clock says "... GPS satellites, each of which has four onboard caesium or rubidium atomic clocks." but it would be nice to have more details on type and accuracy in this article. - Rod57 ( talk) 16:08, 17 October 2011 (UTC) reply

The last satellite shown orbited is 12, on February 5, 2016. It has been 3 more years, and if the satellites are being orbited at the pre-12 rate, there should be many more on orbit today. Turns out that one Block III satellite was orbited after the Block IIF /info/en/?search=GPS_Block_IIF Hal9009az ( talk) 05:38, 20 February 2019 (UTC) reply