Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2008-08-22
2011-12-06
Issing, Gregory C (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357410, C342S357440
Reexamination Certificate
active
08072373
ABSTRACT:
In a method for accuracy estimation of network based corrections for a satellite-aided positioning system, with a network of reference stations code and phase measurements are recorded by the reference stations and transferred to a network processing centre. The measurements are converted to observables and single-differences between a master station and at least one auxiliary station selected for each reference station are calculated. Estimates of single-difference between each reference station and the corresponding master station are generated and slant residuals for each reference station and satellite are calculated by using the difference between calculated single-differences and estimates. Subsequently double-differences are formed by differencing satellite s and the slant residuals of a reference satellite k, leading to zenith residuals calculated by mapping the double-differences to a zenith value. Error values for each reference station are computed by using the zenith residuals and residual dispersive and non-dispersive error values for a potential rover position are estimated by combining residual dispersive and non-dispersive error values of all reference stations. The accuracy of network based corrections is represented graphically by generating a map as a grid of potential rover positions with estimated residual dispersive and non-dispersive error values.
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Issing Gregory C
Leica Geosystems AG
Maschoff Gilmore & Israelsen
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