Xiaomi 14T Pro (Redmi K70 Ultra) GPS L1C support was confirmed

[Invalid Data]

According to test, appears that Mediatek 9300 has proper L1C signal output in the API level. And it's being detect as convention L1C/A by GPSTest.

[Baard covington]

My understanding is that GPS L5 is preoperational but set to unhealthy whereas GPS L2 is set to pre-operational but 'healthy', while L1C was reported as developmental and 'unhealthy'. So the question is do the various receivers simply report the presence of L1c, L2c and L5 but simply disregard these for navigation?

if I recall correctly, only Galileo E5 is operational and healthy?

On Thu, 1 Aug 2024 at 12:07, Invalid Data <weiti...@gmail.com> wrote:

According to test, appears that Mediatek 9300 has proper L1C signal output in the API level. And it's being detect as convention L1C/A by GPSTest.

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[Sean Barbeau]

Thanks for the report! I opened https://github.com/barbeau/gpstest/issues/690 to fix this.

Could you please share a screenshot from GnssLogger and see if it's detected correctly?

https://play.google.com/store/apps/details?id=com.google.android.apps.location.gps.gnsslogger

Sean

[Invalid Data]

Hi Mr barbeau, I know it requires gnsslogger and I am currently looking for help from those who own the device. Those are very good people who are willing to test new phones.
As for Mr Baard's concern, L1C signal is a medium or measurement tool for pseudo range.
As long as future satellite launches continue to join the GPS fleet, this sooner or later will be beneficial for supported receivers.
The main reason it is marked as unhealthy is the lack of new satellites and the infamous delay of GPS next gen control system. Without the system, L1C signal cannot probably broadcast ephemeris and almanac, thus cannot be operational by itself. This signal need to work with other traditional GPS signal to get orbit and the clock data.
Speaking of such small amount of satellite, it is true that 6 satellites are insufficient to distribute around globe.
But there is another different story, in Japan Australia China, the QZSS system has four regional satellites that fully support l1c signal. At least for any people who live there right now, they can make use of 3 to 6 L1C signal, depends on the location and time.
I would say that technically L1C signal is the equivalent of BDS B1C. They both feature 10 times more robustness. And the Galileo E1 features 4 times in theory. All 3 signal is cutting-edge compared to GPS L1C/A. So this is a moment like 2016 where dual band receiver gradually and eventually replace single band receiver

'Sean Barbeau' via GPSTest <gpstest...@googlegroups.com> 于 2024年8月2日周五 下午9:29写道：

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