Adafruit Ultimate GPS with USB - 66 channel w/10 Hz updates : ID 4279 : $29.95 : Adafruit Industries, Unique & fun DIY electronics and kits
High quality for IOT M2M Internet of Things small size GPS antenna module, GPS chip design GM 22U7 UART output protocol,|gps antenna|gps antenna modulesmall gps antenna - AliExpress
Frontiers | Time Synchronization for Wireless Sensors Using Low-Cost GPS Module and Arduino | Built Environment