Amazon.com: ICP DAS GPS-721 GPS Receiver and 1 DO, 1 PPS Output Module communicable Over RS-232 and RS-485. : Electronics
USB GPS with PPS and pretty cheap too - Server operators - NTP Pool Project
Adding PPS to a cheap USB GPS stick | Brendan's Radio Blog
Setting Everything Up | Adafruit Ultimate GPS with gpsd | Adafruit Learning System
VK-162 G-Mouse - Remote Mount USB - External GPS Navigation Dongle - Supports Stratux, Raspberry Pi, - YouTube
NEO-M6N with micro USB GPS Satellite Positioning Module STM32 C51 - kunkune.co.uk
Gps Module Usb To Gps Converter Usb-port-gps Module Nema 0183 Cp2102 For Raspberry Pi 3 Model B Pi 2 B+ A+ - Buy Mini Usb Gps Module,Usb Gps Module For Raspberry Pi3,Usb
USB GPS Receiver GPS/GLONASS Navigation and Tracking Wiki - DFRobot
USB GPS Receiver GPS/GLONASS Navigation and Tracking Wiki - DFRobot
Add a $12 USB GPS to your homelab to get millisecond-accurate NTP time : r/homelab