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Re: [gpsd-users] gpsd quickfix

From: lapaleves
Subject: Re: [gpsd-users] gpsd quickfix
Date: Sat, 28 Apr 2012 18:14:28 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2

Dear Tom,

Thanks for your answer. I'm not very familiar with the subject, but I'm afraid we are not talking about the same. This is definetly not the carrier-assisted GPS (A-GPS). It needs network though, to sync time with an ntp server.

To prove that I just tried it in airplane mode, with my WLAN connected. I got a fix with 5 sats in less than a minute. Without WLAN it's the same as before. Being registered at a carrier does not make a difference.

As I wrote this is about knowing the time very precisely, and based on that knowing the exact position of the sats immediately. In Windows handheld platforms this feature is called "quickGPS".


On 04/28/2012 05:56 PM, Tomalak Geret'kal wrote:
On 28/04/2012 16:55, Tomalak Geret'kal wrote:
On 26/04/2012 22:35, lapa wrote:

I have just realized, that with a single conf file I can make my Android gps fix much faster. I am not an expert, but as far I understand this is about using the known positions of satellites involving ntp to get an unexpected fast fix even indoors.

I would like to know if such an option is available or planned for gpsd. This would be very appreciated for a lot of people using notebooks with mobile broadband, usually including a gps, too.

Thanks for your answer,


This is called "assisted GPS" and is not supported in gpsd at present.

(This is discussed in the gpsd FAQ -


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