New Galileo service set to deliver 20 cm accuracy

Does someone already use a dual frequency smartphone ?

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Might also be worth a look at using an SDR/gnuradio. Seems to need a reasonable SDR RF front end though, but have seen some discussion using cheap USB dongles…

I already use a dual-frequency receiver (u-blox F9P) with the centipede RTK network.

For HAS, 20 cm accuracy is the convergence target in less than 300 seconds.

(source: https://www.unoosa.org/documents/pdf/icg/2021/Tokyo2021/ICG_CSISTokyo_2021_05.pdf)

The target seems to be with Galileo only and float convergence algorithm. With GPS+Galileo (without iono correction, not available in HAS Phase 1) and optimized algorithm, one may go down to 3 cm (horizontal) in about 2 mn.

It’s surprisingly difficult to get good quality GPS devices. Most of them don’t support the full accuracy of the GPS/Gallileo services available.
You end up having to spend hundreds on dedicated GPS hardware that is impractical to use.

Around 2000, we paid hundreds of euros/dollars for an outdoor GPS like Magellan Meridian for myself. Even in 2015, I bough my Etrex 30 for 200 €.

It costed my about 400 € to build my ublox F9P RTK datalogger (incl. antenna) following this project:

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