I'm no expert on GPS, but once you have the stored data it's good for several days isn't it? So after the first fix it shouldn't be too onerous.
I'm no expert on GPS, but once you have the stored data it's good for several days isn't it? So after the first fix it shouldn't be too onerous.
That works for phones (and you can download it from the internet if out of date). It doesn't work for cameras which are usually turned off until you want to take pictures.
> It doesn't work for cameras which are usually turned off until you want to take pictures.
The GPS almanac is valid for 180 days, so if you can save it (it's 15000 bits, ~1.8 kB), and keep time within ±20s and assuming a position of ±100km of your last fix, you can do a "warm" start with-in a minute:
* https://en.wikipedia.org/wiki/Time_to_first_fix
A completely cold start takes less than 15 minutes.
And yes, cameras are usually turned off, but they do still trickle some power to keep the on-board clock going: so as long as you use your camera once every six months, and in the same city, there's a good chance you'll get a quick fix.
All I know is I've never seen the GPS module for my 10+ year old Pentax k30 take more than a few minutes to get a fix after months of having the battery completely removed, and it has no network connection.