论文信息 - Linear Referencing and Other Forms of Location Expression for Transportation California Department of Transportation Testbed

Linear Referencing and Other Forms of Location Expression for Transportation California Department of Transportation Testbed

S/A Selective Availability. Deliberate degradation of GPS signal by U.S. Department of Defense. The practice was discontinued in May 2000. GPS coordinates were expected to be accurate within 100 m with S/A turned on, and about 10 m with S/A off. DGPS improves accuracy in either case.

Richard L Church | Val Noronha

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