Method for each of a plurality of satellites of a secondary global navigation satellite system in a low earth orbit

US10859712B2 · kind B2 · utility

Assignee

• Airbus Defence and Space GmbH · DE

Inventors

• Francis Soualle · Munich, DE
• Mahamoudou Ouedraogo · Neubiberg, DE
• Jean-Jacques Floch · Munich, DE
• Alexander Zenzinger · Landshut, DE
• Stefan Sassen · Munich, DE
• Oliver Baur · Taufkirchen, DE
• Jens Heim

Key dates

• Filing date: Jan 25, 2018
• Grant date: Dec 8, 2020
• Expiry date: Dec 8, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/393
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for each of a plurality of satellites of a secondary Global Navigation Satellite System, GNSS, in a Low Earth Orbit, LEO, comprising receiving GNSS signals, in a first frequency band, from Line-Of-Sight, LOS, satellites of at least one primary GNSS in a Medium Earth Orbit. Candidate sets of orbit and clock corrections for the LOS satellites are received. A Position-Velocity-Time, PVT, calculation is performed based on code and/or carrier pseudo-ranges between a respective satellite of the secondary GNSS and the LOS satellites. The code and/or carrier pseudo-ranges are derived from the GNSS signals and are corrected by a single set of the candidate sets. A short-term prediction model is determined for an orbit and clock of the respective satellite based on the PVT and is included in a navigation message, transmitted in a second frequency band, modulated onto a LEO navigation signal intended for terrestrial user equipment.