modulating time markers

[Hul Tytus]

I'm looking into a time marker modulated onto a rf carrier that is
simple and at the same time accurate. The marker on the low frequency
signal carrying the US time reference which is said to invert the carrier
to mark the time certainly sounds simple. The remarkable accuracy of the
RTK GPS devices, actual inches are claimed, suggests a very accurate
means of reading the time marker.
Anyone know of a text that deals with such circuitry or perhaps a
schematic of a gps reciever with enough detail to show how it's done?

Hul

[Niocláiſín Cóilín de Ġloſtéir]

Dear Hul Tytus:

Happy New Year!

This is not as requested but might help to go to where you want to. In the
Year that is called 2009 I reviewed "Fundamentals of Global Positioning
System Receivers - A Software Approach" by James Bao-yen Tsui. It does not
contain schematics. My copy is in storage so I cannot look it up to say
what its index or table of contents say about encoding timing or radio
signals. Sorry! Good luck!

HTTPS://ACCU.org/bookreviews/2009/gloster_1826

[Paul Rubin]

Post by Hul Tytus
Anyone know of a text that deals with such circuitry or perhaps a
schematic of a gps reciever with enough detail to show how it's done?

GPS is extremely complicated and studying it is probably not worth your
while if you're only trying to modulate a time signal onto an RF
carrier. For that, look at basic RF digital modulation techniques. Are
you trying to get microsecond accuracy? Sub-millisecond? Sub-second?
It gets easier at coarser levels. You stop having to account for speed
of light delay between the transmitter and receiver, relativistic
corrections because of the endpoints being in motion, etc.