Henry J Cobb

US Patent:

RE372560, Jul 3, 2001

Filed:

Nov 5, 1998

Appl. No.:

9/187194

Inventors:

Clark E. Cohen - Palo Alto CA
Bradford W. Parkinson - Los Altos CA
John D. Powell - Menlo Park CA
David G. Lawrence - Mountain View CA
Boris S. Pervan - Mountain View CA
Henry S. Cobb - Stanford CA

Assignee:

IntegriNautics, Inc. - Menlo Park CA

International Classification:

G01S 510
G01S 168
G01S 502
G01S 108
H04B 7185

US Classification:

34235706

Abstract:

A GPS system and method for generating precise position determinations. The GPS system includes a ground based GPS reference system which receives with a reference receiver GPS signals and makes phase measurements for the carrier components of the GPS signals. The GPS reference system then generates and broadcasts an initialization signal having a carrier component and a data link signal having a data component. The data component of the data link signal contains data representing the phase measurements made by the reference receiver. The GPS system also includes a GPS mobile system which receives with a mobile position receiver the same GPS signals as were received by the reference system. In addition, the GPS position receiver receives the data link and initialization signals broadcast by the reference system. The GPS position receiver then makes phase measurements for the carrier components of the GPS signals during and after an initialization period and makes phase measurements for the initialization signal during the initialization period.

US Patent:

55722180, Nov 5, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/480021

Inventors:

Clark E. Cohen - Palo Alto CA
Bradford W. Parkinson - Los Altos CA
John D. Powell - Menlo Park CA
David G. Lawrence - Mountain View CA
Boris S. Pervan - Mountain View CA
Henry S. Cobb - Stanford CA

Assignee:

IntegriNautics - Palo Alto CA

International Classification:

G01S 502
G01S 108
H04B 7185

US Classification:

342357

Abstract:

A GPS system and method for generating precise position determinations. The GPS system includes a ground based GPS reference system which receives with a reference receiver GPS signals and makes phase measurements for the carrier components of the GPS signals. The GPS reference system then generates and broadcasts an initialization signal having a carrier component and a data link signal having a data component. The data component of the data link signal contains data representing the phase measurements made by the reference receiver. The GPS system also includes a GPS mobile system which receives with a mobile position receiver the same GPS signals as were received by the reference system. In addition, the GPS position receiver receives the data link and initialization signals broadcast by the reference system. The GPS position receiver then makes phase measurements for the carrier components of the GPS signals during and after an initialization period and makes phase measurements for the initialization signal during the initialization period.