| Popis: |
This paper proposes the use of Regional Satellite Positioning Systems (RNSSs) in addition to a Global Navigation Satellite System (GNSS)to determine the positions of satellites in Geosynchronous EquatorialOrbit (GEO). Signals from GNSS satellites observed in GEO are limitedbecause they can only receive GPS signals over the other side of theearth where they are not obscured. In addition, those observable signalsare from a paricular direction opposite side of the earth, resulting inpoor Dilution of Precision (DOP), which causes a significant radial error.Signals from RNSSs, located at different altitudes from MEO GNSSs,are observed from the diverse direction compared to the MEO GNSSs.These additional signals from the diverse direction enhance observabilityand improve the DOP. In this paper, we analyze the link budget andDOP in GEO using GPS and Quasi-Zenith Satellite System (QZSS) asexamples to verify the effectiveness of receiving signals from near RNSSs.Our link budget analysis showed that QZSS signals could be receivedfrom satellites in GEO over a wide range. The DOP was improved byusing signals from a near QZSS. The proposed method can be utilizedfor other GEO RNSSs, such as NavIC or BeiDou, and can be expandedto any GEO satellite by adapting the receiver. In addition, the navigationperformance was analyzed to validate the improved performance. |
