Andy – I compared several inexpensive GPS disciplined Reference Oscillators in 2023:
https://www.reeve.com/Documents/Articles%20Papers/Reeve_GDOComp.pdf
or
https://www.astronomy.me.uk/wp-content/uploads/2026/07/Reeve_GDOComp.pdf
Whitham Reeve
Andy – I compared several inexpensive GPS disciplined Reference Oscillators in 2023:
https://www.reeve.com/Documents/Articles%20Papers/Reeve_GDOComp.pdf
or
https://www.astronomy.me.uk/wp-content/uploads/2026/07/Reeve_GDOComp.pdf
Whitham Reeve