Furuno Electric Company Limited

Yoji Goto

Naomi Fujisawa

Hiraku Nakamura

Katsuo Yamada

A pseudo range is corrected with high accuracy using a pseudo range correction method that incorporates carrier smoothing. A code pseudo range correction unit () performs carrier smoothing of an L1 code pseudo range (PR(i)) by the temporal change (&#x394;ADR(i)) in an L1 carrier phase, and performs carrier correction of a code ionosphere delay (I(i)) by the temporal change (&#x394;I(i)) in a carrier ionosphere delay. The code pseudo range correction unit () performs ionosphere delay correction by subtracting the corrected ionosphere delay (I'sm(i)) from the L1 code pseudo range (PRsm(i)) after smoothing processing. At this time, a direction of the delay in the temporal change (&#x394;I(i)) in the carrier ionosphere delay included in the temporal change (&#x394;ADR(i)) in the L1 carrier phase is matched with a direction of the delay in the temporal change (&#x394;I(i)) in the carrier ionosphere delay used to calculate the corrected ionosphere delay (I&#x2032;sm(i)).

Satellite navigation device

To provide an art that can improve a performance of a GNSS receiver. A GNSS receiverincludes a receiver, a navigation message acquiring unit, a navigation message processor, and a calculator. The receiverreceives signals from satellites. The navigation message acquiring unitacquires predetermined information in navigation messages contained in the signals received by the receiver. The navigation message processoroutputs either one of the same kind of information in the plural different kinds of navigation messages, which is acquired by the navigation message acquiring unit. The calculatorperforms a calculation based on the information outputted from the navigation message processor

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Nishinomiya, Japan

Yoji Goto