• After 15+ years, we've made a big change: Android Forums is now Early Bird Club. Learn more here.

GPS Hz?

0

0100

Newbie
Could someone tell me at what Hz the GPS runs at in the X?

Also if someone know what the X2 and incredible GPS runs at that would be awesome.

Thanks!
 
So... GPS is not a transmission protocol for consumers. You can receive the signal, but not transmit. Thus, the phones don't really "run at" that frequency, they receive it.

All phone receive on the same frequency, and Wikipedia informs me that GPS transmission is 1.57542 GHz (L1 signal) and 1.2276 GHz (L2 signal).
 
Oh I see. I figured phones could do 1-5hz maybe even 10hz some day in the future. I guess I need to get one of those external GPS receivers that can run 10Hz.

Thanks for the info!
 
The GPS Status & Toolbox program has settings for 1,5 & 10 Hz. I think its probably a function of how much processing time you want to dedicate.
 
0100 said:
I figured phones could do 1-5hz maybe even 10hz some day in the future. I guess I need to get one of those external GPS receivers that can run 10Hz.
Click to expand...
Ah, you are looking at update rate. As nsa says, that app can be set for 1, 5, and 10. I __BELIEVE__ that the US government limits non-military to 10Hz. Unless you are using it for navigation control, I don't know why anything more frequent that 1Hz is useful; what (if I may ask) are the advantages to you of the faster update?
 
Ohh.. I see. You were asking about the polling frequency. Sorry, I misunderstood. Ignore me :)
 
nsa_sailor said:
I'm curious as to how they would control that. I'm thinking it's a feature of the receiver, not the transmitter.
Click to expand...

It is, but any devices like this (including GPS receivers) have to pass FCC approval. So technically, someone could probably homebrew a higher frequency receiver, but since they won't pass FCC, they can't be sold on the market.
 
Ok sorry last question.

I downloaded the app but can't find an area in the settings to change the Hz.

The only thing I have found is Settings>GPS & Sensors>Sensor filtering and you can pick weak medium or strong filtering.
 
nsa_sailor said:
I'm curious as to how they would control that. I'm thinking it's a feature of the receiver, not the transmitter.
Click to expand...
As binvis said, it is. There were, back in the dark ages when I began playing with GPS, long before they had built in maps, several "rules" IIRC. They couldn't update more rapidly than 0.1 sec, they couldn't operate if a simultaneous elevation and velocity were exceeded. I THINK the height was 20,000 meters and velocity was 1000 km/hr. This was to limit the usefullness for weapons delivery. Several manufacturers hard limited speed and elevation rather than the simultaneous requirement ... easier ... and who other than a jet or shuttle pilot would care. There was an acceleration and "jerk" (rate of change of acceleration) limit, too, again IIRC ... if you need to know, the GPS newsgroup still is active and there are real experts there.
 
You must log in or register to reply here.
Back
Top Bottom