gps.txt

google "rtk gps arduino"

https://learn.sparkfun.com/tutorials/gps-rtk-hookup-guide/all
https://www.sparkfun.com/products/15005   SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic)

google "gps rtk 2"
https://www.sparkfun.com/products/15136   SparkFun GPS-RTK2 Board - ZED-F9P (Qwiic)
https://learn.sparkfun.com/tutorials/gps-rtk2-hookup-guide/all   GPS-RTK2 Hookup Guide
https://www.sparkfun.com/products/15192   GNSS Multi-Band Magnetic Mount Antenna - 5m (SMA)


https://ru.wikipedia.org/wiki/Спутниковая_система_навигации
https://en.wikipedia.org/wiki/Satellite_navigation
https://ru.wikipedia.org/wiki/Real_Time_Kinematic
https://ru.wikipedia.org/wiki/Differential_GPS


http://rtknet.ru/
https://geodetika.ru/site/bazovye-stantsii/
https://geodetika.ru/product/south-galaxy-g6/


google "usb gps-receiver high-accuracy"
https://eos-gnss.com/product/key-features
https://eos-gnss.com/product/arrow-series/arrow-gold/   Arrow Gold RTK GNSS
https://gpswebshop.com/collections/usb-gps/products/gnss100l-high-sensitivity-usb-gnss-receiver-72-channels-tri-system-gps-glonass-galileo-ip67-waterproof
https://gpswebshop.com/collections/usb-gps/products/gnss200l-industrial-high-sensitivity-usb-gnss-receiver-72-channels-gps-glonass-galileo-tri-system-ip67-waterproof
http://www.canadagps.com/ColumbusV800plus.html   Columbus V-800+ GPS Data Logger (32Mb Memory, 248,000 Waypoints)
http://www.canadagps.com/ColumbusV800.html  Columbus V-800 high speed high accuracy usb GPS receiver (66 channels MTK II, 5hz)

https://shop.zubax.com/products/zubax-gnss-2
https://zubax.com/products/gnss_2


!!!!!
https://www.novatel.com/products/


https://zubax.com/products/gnss_2  GNSS 2 High-performance board-level positioning module with compass and barometric altimeter for robots and unmanned vehicles.