Scalable common view time transfer and related apparatuses and methods
Common view time transfer and related apparatuses and methods are disclosed. An apparatus includes a receiver oscillator to provide a local clock signal and one or more processors. The one or more processors are to perform, at least partially based on the local clock signal, event time tagging pre-processing at least partially responsive to satellite signals received from one or more satellites to generate a decimated precision correction state estimate; determine, per satellite signal pseudo range residuals; determine a navigation engine clock state; perform a precision clock state pre-processing operation at least partially responsive to the navigation engine clock state and the decimated precision correction state estimate to generate a precision navigation clock state; and generate a common view real time report at least partially responsive to the per satellite signal pseudo range residuals and the precision navigation clock state.
1. An apparatus, comprising:
a timing source; and
one or more processors to:
obtain a precision correction state estimate;
obtain per satellite signal pseudo range residuals;
obtain a navigation engine clock state;
generate a precision navigation clock state at least partially responsive to the precision correction state estimate and the navigation engine clock state; and
generate a common view real time report at least partially responsive to the per satellite signal pseudo range residuals and the precision navigation clock state.
2. The apparatus of claim 1 , wherein the timing source comprises a receiver oscillator.
3. The apparatus of claim 1 , wherein the one or more processors are to:
perform event time tagging pre-processing at least partially responsive to satellite signals to obtain the precision correction state estimate.
4. The apparatus of claim 1 , wherein:
the apparatus is an authoritative time system; and
the one or more processors implement a real time report disseminator to provide the common view real time report or a reduced common view real time report to a client time system.
5. The apparatus of claim 4 , wherein the real time report disseminator includes a common view real time report dissemination reduction processor and a protocol mapper.
6. The apparatus of claim 1 , wherein:
the apparatus is a client time system; and
the one or more processors are to perform a common view real time report reception operation on a common view real time report or a reduced common view real time report received from an authoritative time system.
7. The apparatus of claim 6 , wherein the common view real time report reception operation includes a protocol de-mapper.
8. The apparatus of claim 1 , wherein the one or more processors implement a common view real time report update generator to generate the common view real time report.
9. The apparatus of claim 1 , wherein the one or more processors are to:
perform a precision clock state pre-processing operation to generate the precision navigation clock state.
10. The apparatus of claim 1 , wherein the apparatus includes a global navigational satellite system (GNSS) receiver.
11. A method, comprising:
obtaining a precision correction state estimate;
obtaining per satellite signal pseudo range residuals;
obtaining a navigation engine clock state;
generating a precision navigation clock state at least partially responsive to the precision correction state estimate and the navigation engine clock state; and
generating a common view real time report at least partially responsive to the per satellite signal pseudo range residuals and the precision navigation clock state.
12. The method of claim 11 , comprising:
performing event time tagging pre-processing at least partially responsive to satellite signals to obtain the precision correction state estimate.
13. The method of claim 11 , comprising:
disseminating a real time report dissemination operation to provide the common view real time report to a client time system.
14. The method of claim 13 , wherein disseminating the real time report dissemination operation comprises:
performing a common view real time report dissemination reduction processing operation; and
performing a protocol mapping function.
15. The method of claim 11 , comprising:
receiving the common view real time report or a reduced common view real time report from an authoritative time system.
16. The method of claim 11 , wherein generating the precision navigation clock state comprises:
performing a precision clock state pre-processing operation at least partially responsive to the precision correction state estimate and the navigation engine clock state, including filtering the navigation engine clock state using a delay matching decimation filter.
17. The method of claim 11 , which is performed by at least one of an authoritative time system or a client time system.
18. Computer-readable media having machine-executable code stored thereon, the machine-executable code to adapt one or more processors to perform operations including obtaining a precision correction state estimate; obtaining per satellite signal pseudo range residuals; obtaining a navigation engine clock state; generating a precision navigation clock state at least partially responsive to the precision correction state estimate and the navigation engine clock state; and generating a common view real time report at least partially responsive to the per satellite signal pseudo range residuals and the precision navigation clock state.
19. The computer-readable media of claim 18 , wherein the machine-executable code is to adapt the one or more processors to perform operations including performing event time tagging pre-processing at least partially responsive to satellite signals to generate a precision correction state estimate.
20. The computer-readable media of claim 18 , wherein the machine-executable code is to adapt the one or more processors to perform operations including disseminating a real time report dissemination operation to provide the common view real time report to a client time system.
21. The computer-readable media of claim 18 , wherein the machine-executable code is to adapt the one or more processors to perform operations including receiving a common view real time report or a reduced common view real time report from an authoritative time system.
22. The computer-readable media of claim 18 , wherein the machine-executable code is to adapt the one or more processors to perform operations including event time tagging pre-processing at least partially responsive to satellite signals received from one or more satellites to generate the precision correction state estimate.