Message-ID: <39105FF0.940C6192@netscapeonline.co.uk>
Date: Wed, 03 May 2000 17:20:48 +0000
From: "g3kev" <g3kev@netscapeonline.co.uk>
Organization: Netscape Online member
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: GPS Signals Accurate Now!!!
References: <200005021425_MC2-A375-6529@compuserve.com>
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"'Geri' Kinzel, DK8KW" wrote:

> Hello,
>
> for those of you using GPS receivers to measure distances for example for
> field strehgth measurements (Gamal and I used a Garmin GPS45XL for our
> field strength profile of DCF39 and I used this unit to measure the profile
> of my own transmitter), here is some great news from the AMRAD e-mail
> reflector:
>
> > In the next few days, we should be getting an announcement that the
> > selective availability system will be either turned off or reduced in
> > some fashion.  See  http://www.igeb.gov/
> > Cliff K7RR
>
> Indeed, it happened midnight last night! SA is off, and recording of my GPS
> signal with a stationary antenna shows that all fixes are within a circle
> of 15m radius (95% even within 10m radius!). Altitude error is also reduced
> down to 1.5 times the horizontal error, so you can climb up your tower and
> measure the height of it using GPS!
>
> Also time measurment accuracy using GPS should have increased according to
> what I read on the internet (great news for those experimenting with
> synchronized signals on LF!).
>
> So, what do they do with all those longwave DGPS stations? More sites and
> tower to be activated before they are de-commissioned (and what do they do
> with the evacuated frequencies after de-commissioning ... )!

Hi Geri
I use a Garmin GPS III and find it very useful. I checked today and find the
accuracy indicated for location was 17 feet. This model has a world map and
selectable maidenhead loc system so that I can measure any distance world wide
accurately, plus all the other functions.
The computer and mathematical approach is now redundant and it all fits into my
pocket hi
73 MAL/G3KEV


>
>
> Best 73
>
> Geri, DK8KW (W1KW)
> http://www.qru.de