Method and apparatus for precise noncoherent doppler tracking of

Details Method and apparatus for precise noncoherent doppler tracking of Method and apparatus for precise noncoherent doppler tracking of

1996-09-20

1998-04-28

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

342115, 342 50, 342 46, G01S 1358

Patent

active

057450722

ABSTRACT:
A method and apparatus are disclosed for making precise velocity measurements of a spacecraft using a two-way noncoherent Doppler tracking system. By comparing the received uplink and transmitted downlink frequencies on-board the spacecraft, information is generated that is included in the downlink signal and used to cancel spacecraft oscillator drift rate effects in the two-way Doppler measurement made by the ground station. This data can also be used to characterize the drift rate of the spacecraft oscillator, thus permitting periods of accurate one-way Doppler tracking by the ground station.

REFERENCES:
patent: 3740671 (1973-06-01), Crow et al.
patent: 3860921 (1975-01-01), Wood
patent: 4001690 (1977-01-01), Mack et al.
patent: 4060809 (1977-11-01), Baghdady
patent: 4689806 (1987-08-01), Von Der Embse
patent: 4785463 (1988-11-01), Janc et al.
patent: 4901368 (1990-02-01), Arnold et al.
patent: 5063387 (1991-11-01), Mower
patent: 5187805 (1993-02-01), Bertiger et al.
patent: 5414431 (1995-05-01), McCoskey
patent: 5594454 (1997-01-01), Bevereux et al.
patent: 5644572 (1997-07-01), Olds et al.
J.W.Armstrong et al., "Starprobe: Coronal Plasma Turbulence Effects on Tracking and Telemetry", Presented at the AIAA 20th Aerospace Sciences Meeting, Jan. 11-14, 1982 in Orlando, Florida.

Affiliated with

Also associated with

Rating

Method and apparatus for precise noncoherent doppler tracking of does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for precise noncoherent doppler tracking of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for precise noncoherent doppler tracking of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1536459