Wait does this mean the 20cm accuracy is now done by all decoders with backwards compatibility? I'm actually more interested in GPS -altitude- accuracy (MSL) which conventional receivers don't seem to do well at all (try the opensource GPSTest app, it's neat)
> The I/NAV improvements are based on a trio of innovations.
> The improved time to first position fix comes through reducing the amount of information needed for the receiver to generate a first position fix, at the cost of a reduced initial accuracy in turn. This leads to a first fix within a few seconds, with a ranging error of less than 4.5 m, decreasing further in turn until reaching the accustomed submetre-level accuracy after the reception of the complete Galileo navigation message.
> I/NAV’s improved robustness comes from a new coding method that introduces additional redundancy into the navigation message, so any lost or corrupted data – perhaps blocked by high buildings or reflected off polished artificial surfaces – can be recovered easily.
> Finally, Galileo System Time is made available to receivers without the need to fully demodulate the navigation message by introducing it as a ‘secondary synchronisaton pattern’ within the message, accessible within a few seconds. This is of particular interest to receivers that retreive the Galileo navigation message through the internet or parallel communication networks and therefore are only missing the correct link to the Galileo System Time for the provision of a first fix.
> The I/NAV improvements are based on a trio of innovations.
> The improved time to first position fix comes through reducing the amount of information needed for the receiver to generate a first position fix, at the cost of a reduced initial accuracy in turn. This leads to a first fix within a few seconds, with a ranging error of less than 4.5 m, decreasing further in turn until reaching the accustomed submetre-level accuracy after the reception of the complete Galileo navigation message.
> I/NAV’s improved robustness comes from a new coding method that introduces additional redundancy into the navigation message, so any lost or corrupted data – perhaps blocked by high buildings or reflected off polished artificial surfaces – can be recovered easily.
> Finally, Galileo System Time is made available to receivers without the need to fully demodulate the navigation message by introducing it as a ‘secondary synchronisaton pattern’ within the message, accessible within a few seconds. This is of particular interest to receivers that retreive the Galileo navigation message through the internet or parallel communication networks and therefore are only missing the correct link to the Galileo System Time for the provision of a first fix.