Re: [Xastir] SX Blue II GPS

2008-04-30 Thread Lance Cotton

Jim Tolbert wrote:
I saw this in a ESRI GIS magazine.   Anyone know anything about it?  
Does it have some new whoopti-doo  chip set?  It claims- Best Accuracy 
for your money on the market today.


http://www.geneq.com/catalog/en/sxblue2.html


The specs say:
DGPS Horizontal Accuracy:
   60cm 2dRMS, 95% confidence 1 ( 30cm HRMS,  25cm CEP)
Horizontal Accuracy:
   2.5m 2dRMS, 95% confidence (autonomous, no SA) 2

Where the footnote 2 says:
 2. Depends on multipath environment, number of satellites in view, 
satellite geometry and ionospheric activities


So the sub-meter refers to DGPS. Regular GPS accuracy is around the 
normal. Nothing special here.


-Lance

--
J. Lance Cotton, KJ5O
[EMAIL PROTECTED]
http://kj5o.lightningflash.net
Three Step Plan: 1. Take over the world. 2. Get a lot of cookies. 3. Eat 
the cookies.

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Re: [Xastir] SX Blue II GPS

2008-04-30 Thread Jason KG4WSV
On Wed, Apr 30, 2008 at 7:27 AM, Lance Cotton [EMAIL PROTECTED] wrote:

 Nothing special here.

Oh, I don't know about that  - the hat looked pretty special to me. (:

Seriously, the 20Hz update rate was interesting, mostly because I'm
thinking of some rocket applications.

I googled around and found someone with a price listed - $2095 (no, I
did _not_ forget the decimal point).

-Jason
kg4wsv
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Re: [Xastir] Couple house-keeping things

2008-04-30 Thread Jason KG4WSV
On Wed, Apr 30, 2008 at 6:09 PM,  [EMAIL PROTECTED] wrote:

  2 - Looks like it's time to update some of the scripts in the
  ~/xastir/scripts directory. Specifically get-NWSdata and get-gnis

Is the GNIS data still broken?

One of these days I'll make a shapefile out of the old data I have on hand.

-Jason
kg4wsv
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Re: [Xastir] SX Blue II GPS

2008-04-30 Thread Richard Polivka, N6NKO
I looked at the brochure for this. There is something that tells me to 
beware of this. If it sounds to be too good to be true...


I know that one time I did a one hour occupation of a HARN monument here 
in WI with my laptop and my Garmin GPS V.
I then brought the data back and did some post-processing and I got 
within +/- 0.2 meters.


I question the antenna. Looks like a fancy covered patch antenna.

I really worry about the quality of the data. Besides, it is really that 
necessary for this kind of accuracy unless you are doing site surveys?


73 from 807,

Richard, N6NKO



Jason KG4WSV wrote:

On Wed, Apr 30, 2008 at 7:27 AM, Lance Cotton [EMAIL PROTECTED] wrote:

  

Nothing special here.



Oh, I don't know about that  - the hat looked pretty special to me. (:

Seriously, the 20Hz update rate was interesting, mostly because I'm
thinking of some rocket applications.

I googled around and found someone with a price listed - $2095 (no, I
did _not_ forget the decimal point).

-Jason
kg4wsv
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