1250 days in operation of Iridium Pilot Project SVP-B/RTC/GPS drifter | Marlin-Yug Ltd
Calibrating an MCU's RTC Using GPS - Circuit Cellar
Raspberry Pi GPS/RTC Expansion Board
Real Time Clock (RTC) Unit (HYM8563) - RobotShop
1375 - SmartNixie GPS RTC - Taylor Electronics
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