Wide area differential GPS as a future navigation system in the U.S

Author

Kee, Changdon ; Parkinson, Bradford W.

Author_Institution

HEPL Gravity Probe B, Stanford Univ., CA, USA

fYear

1994

fDate

11-15 Apr 1994

Firstpage

788

Lastpage

795

Abstract

The Global Positioning System (GPS) is an extremely accurate positioning sensor with an accuracy of 100 meters. However in aircraft precision approaches, higher accuracy is required. Conventional differential GPS (DGPS) usually has accuracies of 1-3 meters within 100 kilometers of the reference station, even with selective availability (SA) errors. If DGPS is implemented on a large scale, the total number of monitor stations needed to cover the continental U.S. to the same accuracy would exceed 500. Wide area differential GPS (WADGPS) is a system that can reduce the number of monitor stations substantially while achieving the same accuracy. Test results showed a meter 3D positioning error with zero latency and 2-5 m 3D positioning error with 5-10 seconds of latency using WADGPS which has 6 monitor stations with 1632 km minimum baseline to a dual frequency user

Keywords

aircraft; radionavigation; satellite relay systems; 3D positioning error; DGPS; Global Positioning System; United States; WADGPS; aircraft precision approaches; monitor stations; navigation system; selective availability; wide area differential GPS; Aircraft navigation; Degradation; Delay effects; Error correction; Frequency estimation; Global Positioning System; Gravity; Monitoring; Satellite broadcasting; Satellite navigation systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Position Location and Navigation Symposium, 1994., IEEE

Conference_Location

Las Vegas, NV

Print_ISBN

0-7803-1435-2

Type

conf

DOI

10.1109/PLANS.1994.303391

Filename

303391