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Regarding RTK technique, if you have appropriate equipment for full RTK you will have up to cm accuracy. I wondered if we can use very simple external to device antenna (I'm not speaking about Garmin GPS device style build in antennas like we all had in past mobile phones) communicating with the smartphone via wifi/bluetooth/rfid + software layer running on the smartphone, to somehow take advantage on RTK technique in order to improve current GPS accuracy which is ~3 meters to let's say even something like ~1 meter?

Will we compromise accuracy by using very primitive external hardware - So is a simple antenna relevant for RTK?

Speaking about this article

So they said "one base station and one on a vehicle, connected via radio link" but not explaining + $900 is too much. The question is very simple: Can we have the equivalent to "base station" as the smartphone, and equivalent to "one on a vehicle" as simple piece of metal-e.g. antena, all together costs nothing comparing to smartphone price, in order to get 1 meter accuracy compromising the 1 cm accuracy because still we modified here cheaper constellation?

  • It boils down to the GPS Chipset being used. communityhealthmaps.nlm.nih.gov/2014/07/07/… – Mapperz Jul 29 '16 at 16:10
  • @Mapperz thanks can you please explain? – michael Jul 29 '16 at 16:35
  • It is discussed here hackaday.com/2013/08/05/centimeter-level-precision-gps-for-500 – Mapperz Jul 29 '16 at 16:53
  • @Mapperz They said "one base station and one on a vehicle, connected via radio link" but not explaining + $900 is too much. The question is very simple: Can we have the equivalent to "base station" as the smartphone, and equivalent to "one on a vehicle" as simple piece of metal-e.g. antena, all together costs nothing comparing to smartphone price, in order to get 1 meter accuracy compromising the 1 cm accuracy because still we modified here cheaper constellation? – michael Jul 29 '16 at 17:07
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    In short, a base and rover GNSS system is going to be considerably more than $900. Think in the $20k+ range even on the low end. In order to get 1 meter accuracy you would not need a base and rover type configuration....you need a GNSS device capable of receiving SBAS or DGNSS corrections. It would also need the software or capability to connect to your smartphone. – Johnson5144 Aug 2 '16 at 13:24
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No, it takes more than an antenna to make the GPS chipset provide the satellite and pseudorange information that high accuracy RTK requires. The cheaper chipsets in cell phones do a position solution internally and report only the results. To do the RTK solution, you need either the raw data out of the phone to recalculate the solutions, or you need a chip in the phone capable of accepting external information.

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