[gps-talkusers] Re: very strange occurrence with v3.3
- From: Michael May <mikemay@xxxxxxxxxxxxxxxx>
- To: gps-talkusers@xxxxxxxxxxxxx
- Date: Mon, 15 May 2006 07:54:19 -0700
Phil,
If you get a chance to read our document entitled GPS accuracy, you will see
just how many variables there are when it comes to tracking satellites. This
document is on our download page and it is in the zip file that contains all
the new 3.5 documents.
Even a few inches can make a difference when it comes to being in better view
of satellites. I always try to sit on the left side of the bus because it is
closer to the middle of the street whereas the right side is closer to the
buildings. This would be reversed in the UK because they drive on the left side
of the road.
In terms of different points triggering, consider the following. The
BrailleNote scans for the nearest point every 12 seconds. This means that it
isn't scanning for 11 seconds. If you are moving, you could very easily miss a
bunch of points. This is intentional since we are looking around for a sample
of points, we don't want to hear them all. If two BrailleNotes are scanning at
different times, you are going to get different points.
It would be tricky to get your timers lined up to trigger on the same points.
Mike
At 07:31 PM 5/14/2006, you wrote:
>Hi. My wife and I both have the M-Power with gps 3.3 and the earthmate blue
>logger receivers.
>We have both units and software configured the same.
>While we were taking a trip over the weekend, we tried out our units.
>we were sitting in the back seat of a van. she was on the left side, and I was
>sitting on the right side.
>Her receiver found the satellites almost immediately, while mine never would
>track any, even with the receiver against the window.
>After about 30 minutes of trying to get my unit to work, I finally gave her my
>receiver to place near her window.
>almost immediately, my receiver was tracking 8 satellites. I don't understand
>why which side of the van would matter, but it did. bye the way, she was
>sitting on the east side at least I believe so.
>the next odd thing was, while we were riding along,
>we had look around mode on.
>most of the time, our units would report different points of interest at the
>same time.
>some times, they would report the same point of interest, but not very often.
>
>now, on the way back, i sat on the left. my receiver would never track any
>satellites.
>
>Phil and Patti
>
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