Could you post a table or artcicle on the different chipsets

[iancjc]

Hi

I have 3 gps unit's one has the sirf star II, one an evermore and the third is the software based pretec lp model. There are obviously an increasing number of others as well.

I'm interested in how they all work and what they offer and the advantages / disadvantages of each - like the xtrac not being much use if moving at motorway speeds.

If this is on the site all ready could you post a link.

Thanks

Ian

[BBB]

Dear Ed

If you are willing to accommodate the above how about incorporating an [color=red]error test into reviews too?[/color]

A good rule of thumb error test is to leave the GPS unit active and stationary for about an hour or so then look at the breadcrumb trail (can that possibly be the correct term?)

The report could be a simple one liner: [b]In one hour with the GPS stationary it recorded a breadcrumb (?) trail with radius of 50 feet[/b

(well, I am sure you get what I mean :-)

[lbendlin]

Sorry but that's not scientific. There are too many exterior influencing factors that are making the results useless (sat constellations, solar activity, cloud cover etc. To make any sense these measurements would have to run for a month...

It's like statistics - don't trust any statistics that you haven't faked yourself.

If you still want to do that - use VisualGPS(ce).
_________________
Lutz

Report Map Errors here:
TomTom/TeleAtlas NAVTEQ

[BBB]

Good View!

Consider:
the earth rotates once a day => a point has approx speed of 1,000 mph

the earth rotates around the sun (forgive me if I have my sums r wrong) => an earthbound point has a speed of approx 64,000 mph

Both => an surface point on earth that is stationary on earth has a combined speed in excess of 60,000 mph

That is in excess of sixty thousand miles per hour if the point is stationary, still, zero velocity with the ground around it.

The only scientific test is to plug in a data set and see what the unit comes up with or to synthesise pre-recorded events in a radio damped & emissions free room.

There really has got to be a real-world dynamic test to add relevence because, well, the units are generally used in far from ideal circumstances anyway.

Sometimes in order to move on realism has to play an important part?


the bagal

[BBB]

Gosh! All I meant is 100 metres accuracy is brilliant,
15 metres accuracy seems fine
3 metres accuracy seems miraculous

BBB

We see you’re using an ad-blocker. We’re fine with that and won’t stop you visiting the site.
Have you considered making a donation towards website running costs?.
Or you could disable your ad-blocker for this site. We think you’ll find our adverts are not overbearing!