GPS World, January 2014
COVER STORY RECEIVER DESIGN GNSS Interoperability Quad Constellation Receiver GPS GLONASS Galileo BeiDou The implementation changes and first live tests of BeiDou and Galileo on Teseo 3 GNSS chips developed in 2013 are covered bringing it to a four constellation machine By 2020 we expect to have four global constellations all on the same band giving us more than 100 satellites under clear sky as many as 30 or 40 simultaneously Philip G Mattos and Fabio Pisoni M XOWLFRQVWHOODWLRQ 166 UVW EHFDPH ZLGHO DYDLODEOH LQ EXW RQO DV WZR FRQVWHOODWLRQV 36 21 66 OWKRXJK UHFHLYHUV DW WKDW WLPH PD KDYH VXSSRUWHG DOLOHR WKHUH ZHUH QR XVDEOH VDWHOOLWHV HLRX ZDV D QDPH RQO DV ZLWKRXW D VSHF DQ LQWHUIDFH FRQWURO GRFXPHQW RU QR UHFHLYHUV FRXOG EH EXLOW RZHYHU WKH KDUGZDUH GHYHORSPHQW WLPH RI UHFHLYHUV KDG EHHQ HIIHFWLYHO VKRUWHQHG WKH DOLOHR KDG EHHQ DYDLODEOH IRU HDUV HLRX FRGHV KDG EHHQ UHYHUVH HQJLQHHUHG E UDFH DR DQG FROOHDJXHV DW 6WDQIRUG DQG DW WKH HQG RI WKH ZHUH FRQ UPHG E WKH VR FDOOHG WHVW ZKLFK DOORZHG VLJQDO WHVWLQJ ZLWKRXW HW UHOHDVLQJ PHVVDJH FKDUDFWHULVWLFV RU FRQWHQW 7KH ODVW ZHHNV RI VDZ WZR JUHDW OHDSV IRUZDUG IRU 166 DOLOHR 29 DQG VWDUWHG WUDQVPLWWLQJ DW WKH EHJLQQLQJ RI HFHPEHU EULQJLQJ WKH FRQVWHOODWLRQ WR IRXU DQG PDNLQJ SRVLWLRQLQJ SRVVLEOH IRU DERXW WZR GPS World January 2014 www gpsworld com 34
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