2 cm accuracy GPS, satellite compass. DIY

[mgrouch]

DIY 2 cm accuracy GPS, satellite compass,
speedometer, accurate SOG/COG, roll or pitch sensor for around $300.

Looks doable using

NavSpark RTK hardware

px1172rh-hat Hat: $200 https://navspark.mybigcommerce.com/px1172rh-hat-multi-band-rtk-for-arduino-raspberry-pi-pixhawk-and-surveying/

And two antennas (placed 2 m distance apart). MULTI FREQUENCY HIGH PRECISION ANTENNA
2 * $50
https://navspark.mybigcommerce.com/multi-frequency-high-precision-antenna/

[mgrouch]

Satellite compass
https://panbo.com/marineelectronicsforum/projects/diy-satellite-compass/?fbclid=IwAR363BHa6gqzxbkV5_CkJ8n_MDmWL0PcJhVU6d6cV7LE2-0atJTCmVkE1Oo_aem_ATst54z0zU_VnLUh9bRly2UdR_rSBy2OFbiIwAyG5wCgdYW87ONgimIcVUlCEjz5Wso&mibextid=Zxz2cZ

[mgrouch]

Another tutorial

http://www.navspark.com.tw/tutorial-4?fbclid=IwAR1TiBL6wUwvZVTSdTjHOQRlGGad2fg0BRZRyocGMyn3Rq70g-bUBtKf6Iw_aem_ATtfNlTR-vUoH4p6agXxZXRjwe1ASUaaB5LeMmCSDcAumfZ2PaeUW8QGOpfzXYmx3sE&mibextid=Zxz2cZ

[mgrouch]

Details about RTKLib

https://rtkexplorer.com/pdfs/manual_demo5.pdf

[mgrouch]

This discussion is not up-to-date.

Check

https://github.com/orgs/bareboat-necessities/discussions/514