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The beautiful thing is that with 4 more or less independent global navigation satellite systems in play (GPS, Galileo, Compass/Beidou, and GLONASS), there will
by CountSessine 14y ago
The beautiful thing is that with 4 more or less independent global navigation satellite systems in play (GPS, Galileo, Compass/Beidou, and GLONASS), there will be more than 70+ satellites in orbit providing ultra-reliable, ultra-accurate navigation and positioning and you won't necessarily have to trust any one of those networks individually.
- dfc 14y agoDo you have a receiver that works with all four systems?
- justincormack 14y agosoftware defined radio would be a good bet for that.
- kalleboo 14y agoI'm curious how soon mobile phones will have so many tuners that SDR is worth it. A typical phone now has what, 4 GSM bands, 3 UMTS bands, 3 LTE bands, WiFi, Bluetooth, GPS, GLONASS, FM Radio, 1seg, NFC...
- justincormack 14y agoThey would probably have more if they were cheaper, all sorts of countries have random frequency bands being freed up for mobile. But I think power consumption still the limiting factor.
- rwg 14y agoSuch a thing doesn't exist. For one, neither Beidou nor Galileo are operational GNSSes, so there is no economic incentive to create receivers that work with those services. Also, the Chinese government only just today published Beidou's ICD, the document that specifies the open-access Beidou signals: http://www.insidegnss.com/node/3331 http://www.insidegnss.com/node/3331
- dfc 14y agoThat was the unstated thesis of my comment.
- CountSessine 14y agoNeither Beidou nor Galileo are usefully operational yet. There are receivers that can handle GPS+GLONASS, though. And my point was that no one who isn't compelled to use only the Chinese system need trust the Chinese system - for most navigation consumers around the world Compass will be there to provide redundancy and to make the error bars smaller.