সময়: বিভিন্ন সংশোধনসমূহৰ মাজৰ পাৰ্থক্য

 

[[File:ChipScaleClock2 HR.jpg|thumb|Chip-scale [[atomic clock]]s, such as this one unveiled in 2004, are expected to greatly improve GPS location.<ref>{{cite web |url=http://www.nist.gov/public_affairs/releases/miniclock.cfm |title=NIST Unveils Chip-Scale Atomic Clock |date=2004-08-27 |accessdate=2011-06-09}}</ref>]]

 

 

 

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