ULTRALOW POWER GNSS RECEIVER

A system for updating almanac data in low-power GNSS mobile devices (30-34), including a server (20) that keeps a local copy of the almanacs stored in each of the devices and evaluates repeatedly the quality of the almanac of each of the mobile devices (30-34). The evaluation comprises predicting th...

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Bibliographische Detailangaben
Hauptverfasser:	Sornin, Nicolas, Constant, Guillaume, Ning, Baozhu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A system for updating almanac data in low-power GNSS mobile devices (30-34), including a server (20) that keeps a local copy of the almanacs stored in each of the devices and evaluates repeatedly the quality of the almanac of each of the mobile devices (30-34). The evaluation comprises predicting the Doppler shifts for all the satellites potentially receivable by the mobile device using the orbital parameters in the copy and comparing the result with an accurate determination of the same Doppler shifts based on real orbital data.