ISRO-made navigation system to rely on Indian atomic clocks
ISRO's regional positioning system NavIC will now rely on high-precision atomic clocks developed by Delhi-based National Physical Laboratory. The move, which will end ISRO's dependence on US-built GPS, comes after seven of 21 clocks onboard ISRO's navigation satellites failed, rendering one satellite useless. Atomic clocks are very precise with a margin of error of one second in 100 million years.