Time-of-day tracking with INS input

Details Time-of-day tracking with INS input Time-of-day tracking with INS input

2007-08-21

2007-08-21

Miska, Vit W. (Department: 2833)

Horology: time measuring systems or devices

Plural timepiece system or system device

With wireless synchronization

C342S357490, C342S357490, C701S214000, C701S220000

Reexamination Certificate

active

11556812

ABSTRACT:
Time-of-day tracking with INS input is described. In one embodiment, a range rate and a range acceleration is generated from inertial navigation system data received from a moveable platform (e.g. an airborne platform). A time and frequency estimation filter receives the range rate, the range acceleration and a timing-based error signal from a time discriminator, and can then generate a time-of-day correction signal and a frequency correction signal. A time-of-day generator receives the time-of-day correction signal and generates a time-of-day correction, and a clock frequency generator receives the frequency correction signal and generates a frequency correction. The time discriminator receives a satellite synchronization signal from a satellite, the time-of-day correction from the time-of-day generator, and the frequency correction from the clock frequency generator. The time discriminator initially generates the timing-based error signal from the satellite synchronization signal, and subsequently generates the timing-based error signal from the time-of-day correction and the frequency correction to synchronize the satellite with the moveable platform.

REFERENCES:
patent: 5812087 (1998-09-01), Krasner
patent: 5945944 (1999-08-01), Krasner
patent: 6317688 (2001-11-01), Bruckner et al.
patent: 6323804 (2001-11-01), Kurby et al.
patent: 6346911 (2002-02-01), King
patent: 2003/0011511 (2003-01-01), King et al.
patent: 2003/0187575 (2003-10-01), King et al.

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