[amsat-bb] Grids and QSL´s
glasbrenner at mindspring.com
Wed Jul 21 18:54:04 PDT 2010
Jim Bennett wrote:
> How accurate does the GPS need to be? I know GPS are similar but very
> different in price. Some are accurate enough to be used for map making.
> But for verification of grids worked, how accurate do they have to be?
, Item 4f:
Grid boundary lines and grid corners must be established using a GPS
receiver whose map datum is set to WGS84, the global default for current
GPS receivers. The GPS receiver should be set to use WAAS (Wide Area
Augmentation System) if
so equipped, since this improves the error figure to as little as 5
feet. In no case may the GPS receiver show an error figure in excess of
20 feet. Any modern GPS receiver equipped with WAAS will easily meet
this requirement, as will most older units without WAAS.
On the newer auto GPS units like the Nuvi series, you can go to the
Menu, then to I think "Where am I" and it will give you a lat long
readout. I'd tell you for sure what the Garmin sequence is to get to
that, but some hoodlum in Dayton relieved me of my wife's GPS this year,
as well as a rental car window. ;-)
73, Drew KO4MA
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