My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of rain) on
my pocket computer (HPC Touch Pro 2 under Windows Mobile 6.1) was the worst
I've seen. An 8 mile walk became about 11 miles, due to several bursts of
erratic signals that went way outside the immediate vicinity. Like most of my
walks, this included a proportion of lightly wooded track, but in the past
that has just resulted in lost signals, not false ones.

It's a longshot, but before I pursue other likely causes, I wonder if
satellite performance can ever deteriorate enough to cause this sort of
behaviour? If so, then anyone else experience similar results please?

--
Terry, East Grinstead, UK

Terry Pinnell wrote:
> My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of
> rain) on my pocket computer (HPC Touch Pro 2 under Windows Mobile
> 6.1) was the worst I've seen. An 8 mile walk became about 11 miles,
> due to several bursts of erratic signals that went way outside the
> immediate vicinity. Like most of my walks, this included a proportion
> of lightly wooded track, but in the past that has just resulted in
> lost signals, not false ones.
>
> It's a longshot, but before I pursue other likely causes, I wonder if
> satellite performance can ever deteriorate enough to cause this sort
> of behaviour? If so, then anyone else experience similar results
> please?

Could it be due to extrapolation during signal loss? If you are walking
straight this could be accurate but if dodging and weaving it could
exaggerate this.

Mike.
--
If reply address is invalid, remove spurious "@" and substitute "plus"
where needed.

"Terry Pinnell" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of rain) on
> my pocket computer (HPC Touch Pro 2 under Windows Mobile 6.1) was the worst
> I've seen. An 8 mile walk became about 11 miles, due to several bursts of
> erratic signals that went way outside the immediate vicinity. Like most of my
> walks, this included a proportion of lightly wooded track, but in the past
> that has just resulted in lost signals, not false ones.
>
> It's a longshot, but before I pursue other likely causes, I wonder if
> satellite performance can ever deteriorate enough to cause this sort of
> behaviour? If so, then anyone else experience similar results please?
>
> --
> Terry, East Grinstead, UK

You got 11 miles of exercise in 8 miles, and you're complaining?


John

The satellites themselves won't deteriorate en masse, but their
constellation for a particular place & time might be less than
optimal.

Trimble's "Planning Software" is designed to provide that sort of
insight.

<http://www.trimble.com/planningsoftware.shtml>

It's been a while since I've used it - I'm not sure it can be
retroactive, but don't see why it couldn't be used that way. Try it
out.


On Sun, 28 Mar 2010 10:10:37 +0100, Terry Pinnell
<(E-Mail Removed)> wrote (with clarity & insight):

>My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of rain) on
>my pocket computer (HPC Touch Pro 2 under Windows Mobile 6.1) was the worst
>I've seen. An 8 mile walk became about 11 miles, due to several bursts of
>erratic signals that went way outside the immediate vicinity. Like most of my
>walks, this included a proportion of lightly wooded track, but in the past
>that has just resulted in lost signals, not false ones.
>
>It's a longshot, but before I pursue other likely causes, I wonder if
>satellite performance can ever deteriorate enough to cause this sort of
>behaviour? If so, then anyone else experience similar results please?

Terry Pinnell wrote the following:
> My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of rain) on
> my pocket computer (HPC Touch Pro 2 under Windows Mobile 6.1) was the worst
> I've seen. An 8 mile walk became about 11 miles, due to several bursts of
> erratic signals that went way outside the immediate vicinity. Like most of my
> walks, this included a proportion of lightly wooded track, but in the past
> that has just resulted in lost signals, not false ones.
>
> It's a longshot, but before I pursue other likely causes, I wonder if
> satellite performance can ever deteriorate enough to cause this sort of
> behaviour? If so, then anyone else experience similar results please?
>
> --
> Terry, East Grinstead, UK
>

Due to the conditions and anomalies of the British Isles, you should
never use a GPS without a brolly there.

--

Bill
In Hamptonburgh, NY
In the original Orange County. Est. 1683
To email, remove the double zeroes after @

Wayne R. <(E-Mail Removed)> wrote:

>The satellites themselves won't deteriorate en masse, but their
>constellation for a particular place & time might be less than
>optimal.
>
>Trimble's "Planning Software" is designed to provide that sort of
>insight.
>
><http://www.trimble.com/planningsoftware.shtml>
>
>It's been a while since I've used it - I'm not sure it can be
>retroactive, but don't see why it couldn't be used that way. Try it
>out.

Thanks, took a look at the description but reckon it's a bit over the top for
my needs.

--
Terry, East Grinstead, UK

"Mike Coon" <Mike@@mjcoon.+.com> wrote:

>Terry Pinnell wrote:
>> My recorded walk yesterday (Sunday 27th March, Sussex, UK, spells of
>> rain) on my pocket computer (HPC Touch Pro 2 under Windows Mobile
>> 6.1) was the worst I've seen. An 8 mile walk became about 11 miles,
>> due to several bursts of erratic signals that went way outside the
>> immediate vicinity. Like most of my walks, this included a proportion
>> of lightly wooded track, but in the past that has just resulted in
>> lost signals, not false ones.
>>
>> It's a longshot, but before I pursue other likely causes, I wonder if
>> satellite performance can ever deteriorate enough to cause this sort
>> of behaviour? If so, then anyone else experience similar results
>> please?
>
>Could it be due to extrapolation during signal loss? If you are walking
>straight this could be accurate but if dodging and weaving it could
>exaggerate this.
>
>Mike.

Well, we did do a fair bit of stopping to study the map, as there were
sections with a surplus of paths through the woods and poor signing. But not
much more than usual.

Anyone else with any recordings of walks/drives from Sunday?

--
Terry, East Grinstead, UK