gps accuracy
How do I improve the accuracy of my GPS?
I am using a Magellan eXplorist 400 series GPS. I have already upgraded the firmware for the unit. I have downloaded and installed all the updates available from the magellan website. I emailed customer support and they said wait until the next update comes out. Surely there has to be another way to improve the accuracy on my GPS, short of buying a better unit?
The inaccuracy may be in the satellite signals. The US government controls the GPS satellites and has them configured to send out random inaccuracies. This is done to try and prevent terrorists from using GPS.
Of course there have always been workarounds. Magellan had a solution years ago where you would station 3 fixed point GPS units and connect them through a differential base. Since their location was fixed any fluctuation that was detected could then be corrected against the mobile unit that you were carrying in the area. In this way it could get accuracy right down to the foot. This was very useful for maping archeaological digs and the like.
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