Satellite-based position determining and message transfer system

Details Satellite-based position determining and message transfer system Satellite-based position determining and message transfer system

1984-09-14

1988-05-10

Fleming, Michael R.

Excavating

371 43, 371 37, G06F 1110

Patent

active

047440830

ABSTRACT:
A radio position determination and message transfer system is implemented using a number of satellites in geostationary orbit for relaying interrogation and reply signals between a ground station and a user-carried transceiver. Message information can be exchanged between a given user transceiver and the ground station, as well as between different user transceivers. The user transceiver is provided with means for monitoring the quality of the radio communication link between the transceiver and one or more of the satelites, based on errors detected in the received interrogation signals. The transmission of a reply signal by the transceiver is enabled only when the link quality is found to be acceptable. The reply signal may contain message information or may constitute a request for a position fix. In the latter case, the transceiver may be configured to await favorable link quality to more than one satellite before the reply signal is transmitted.

REFERENCES:
patent: 3668403 (1972-06-01), Meilander
patent: 3714650 (1973-01-01), Fuller et al.
patent: 3742498 (1973-06-01), Dunn
patent: 3755811 (1973-08-01), Breckman
patent: 3824547 (1974-07-01), Green
patent: 4015259 (1977-03-01), Siverhus et al.
patent: 4114155 (1978-09-01), Raab
patent: 4128835 (1978-12-01), Russell
patent: 4278977 (1981-07-01), Nossen
patent: 4291403 (1981-09-01), Weddill
patent: 4309764 (1982-01-01), Acampora
patent: 4322848 (1982-03-01), Snyder
patent: 4359733 (1982-11-01), O'Neill
patent: 4363123 (1982-12-01), Grover
patent: 4422171 (1983-12-01), Wortley
patent: 4519080 (1985-05-01), Snyder
patent: 4549297 (1985-10-01), Nishimoto
patent: 4653053 (1987-03-01), Pelchat
G. K. O'Neill, "Geostar", AOPA Pilot, vol. 26, No. 9, pp. 53-57, (Sep. 1983).
G. K. O'Neill, "Satellites Instead", AOPA Pilot, vol. 25, No. 1, pp. 51-54 and 59-63, (Jul. 1982).
G. K. O'Neill, "Satellite Air Traffic Control", Astronautics & Aeronautics, vol. 19, No. 3, pp. 27-31, (Mar. 1981).
V. A. Ilyin, "Telecontrol and Telemetering", M. Energoizdat, pp. 248-253, FIG. 8.1, (1982).
V. I. Potegov, "The TDRSS Tracking and Data Relay Satellite System", Foreign Radio Electronics, Nos. 5 and 6, (1984).

Affiliated with

Also associated with

Rating

Satellite-based position determining and message transfer system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Satellite-based position determining and message transfer system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Satellite-based position determining and message transfer system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1325873