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anders987 t1_j5zk6v5 wrote

Reply to comment by EU4Space in Galileo High Accuracy Service (HAS) is now available! Galileo HAS increases the accuracy of Galileo to sub-meter levels. It will strengthen sectors where precise navigation is key, like agriculture or drones, also boosting innovation. by EU4Space

But which phones and other devices support this new HAS mode for improved accuracy? They have to have specific support for it and not just general Galileo support, right?

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EU4Space OP t1_j645k97 wrote

The Galileo High Accuracy Service (HAS) provides free of charge Precise Point Positioning (PPP) corrections, in the Galileo E6-B data component (HAS SIS) and by Internet (HAS IDD) for Galileo and GPS (single and multi-frequency) to achieve real-time improved user positioning performances.

In order to start using the Galileo HAS service, you will need a HAS-capable user equipment. Such device shall be capable of:

  1. Tracking the Galileo and GPS signals supported/corrected by the HAS service. Please refer to the Galileo HAS SDD for details.
  2. Receiving, decoding and applying the Galileo HAS corrections. You may receive corrections through either of the following options:

• HAS SIS. Please refer to the Galileo HAS SIS ICD for further details on reception of Galileo HAS corrections through the Galileo E6 signals (E6B data component).

• HAS Internet Data Distribution interface, based on the NTRIP protocol. The Galileo HAS Internet Data Distribution service is available under registration. Please register to the Galileo HAS Internet Data Distribution to start receiving HAS corrections through the Internet.

  1. Implementing a PPP algorithm providing a Position, Velocity and Timing (PVT) solution based on the previous steps.

In section 2.4 of the Galileo HAS SDD describes the relevant assumptions at user level and the use of Galileo HAS on smartphones has not been verified. This is due to:

  1. The minimum level of quality and stability required on the GNSS observables (code and phase) collected by the user receiver to support high accuracy positioning.
  2. The unavailability of smartphones on the market capable to track Galileo E6 signal and implementing the Galileo HAS SIS ICD.

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In case you have further doubts, please refer to our colleagues at the European GNSS Service Centre (GSC), they'll be able to provide more specific answers. You can reach them at: helpdesk@gsc-europa.eu

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anders987 t1_j64ci8b wrote

Thank you for the detailed answer, but it's not really answering my question. Your previous comment stated that

> If your phone/device is compatible with Galileo, the signal received will automatically be used for all location-based applications

but that's probably just for Galileo in general and not the new HAS, right? And so my conclusion is that no phones currently supports this new precision improvement, and we have to wait until Google adds system wide support in a future version of Android or maybe Play Services.

Although if you need detailed phase observations you have to enable that specifically in Android developer settings today, since it uses a lot more power by not switching off the receiver.

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