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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: GISList: GPS by high power lines |
| Date: |
10/03/2002 03:40:26 PM |
| From: |
Robert Heitzman |
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GPS devices are just fancy radio receivers that use RF frequencies. Anything
that may impact receiving RF signals can have an impact on GPS devices.
Power lines are definatly a problem. In door use, urban canyons, even
regular canyons, can all be problematic.
This issue is the reason alomost all GPS units have strength "meters" and
tell you how many satellites they can "se".
>Had a field worker using a Garmin GPSMap 76 report that it didn't work near
>high power lines, which I found hard to believe. Anyone else have specific
>experience about them not working in such areas, or more general tips about
>where they don't work besides usual (heavy canopy).
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