Hello,
There are various reasons for your sluggish GPS receiver. Having to wait
20 minutes for a fix is uncommon, so if this problem persists, please call
Sendero tech support. Also, I am not sure if you tried turning the GPS
receiver on and off again once you were outside, sometimes that is all it
takes.
Now for the possible culprits...
It is common for the GPS receiver to take a while when it is first
acquiring in a new location. It remembers your last location, so when you
turn it on in the new location it is surprised by the different latitudes
and longitudes. It will take a while to confirm that you have indeed
moved locations, it would rather give you no information than bad
information. The same goes for when it has been turned on indoors, hasn't
been used in a while, or if the battery has recently run out of
juice. Here is a complete description of why this happens from Charles
LaPierre:
"The GPS receiver keeps an internal almanac of where the satellites
"should" be. This almanac is updated when the GPS receiver is linked to
the satellites."
"When the unit is first turned on it starts looking where it "thinks" the
satellites should be based on its current almanac. If after a while it
can't find these satellites in the positions it thinks they should be then
it switches to a mode called Cold start where it forgets its current
almanac and starts searching for all satellites. This happens because as
far as the receiver is concerned the satellites should be in a particular
position at a particular time for this particular part of the country but
they aren't so the receiver starts over from scratch as if you just moved
the receiver half way around the planet, and it rebuilds it almanac of
where the satellites are."
"Cold start or cold boot as they call it can take a while to obtain a GPS
fix 5-10 minutes if you are lucky when out in an open area and the
satellites are in a favorable geometry."
Hope that helps,
Kim Casey
Sendero Group LLC
888.757.6810
At 05:13 PM 4/18/2005, you wrote:
Hi,
I went for a walk during lunch today and I walked for 20 minutes before
gps 3.0 on my Voice Note running Keysoft 5.1 got a fix on some satellites.
Does anyone know why this might have taken so long to acquire a satellite
fix?
I just did a Voice Note warm reboot and then a reinstall of gps 3.0.
I know I could upgrade to keysoft 6.x and gps 3.1 but I can't afford to
right now.
Anyway, can anyone tell me what the problem could have been? I was in a
residential area with only a few trees and nowhere near tall buildings
and it was also a sunny day.
Thanks
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