Map, Compass & GPS

Map, Compass & GPS
Wild flowers along Fall Creek on the way to the Green Lakes - Oregon

Wednesday, May 25, 2016

Improving GPS Accuracy

There are only a few things the hiker can do to improve GPS accuracy.
The first step is to go to the Satellite Information page.  Ideally at least 4 of the green icons will be displayed.  The green icons represent satellites being tracked.  It is critical to have no less than 4 satellites for GPS accuracy. 
Next, make sure that the receiver is not in the DEMO mode.  In DEMO mode no satellites will be tracked.  To regain GPS accuracy go to the main menu>select SETUP>select SYSTEM>select GPS; see below.
Once the GPS receiver is correctly set up the hiker will begin to track satellites almost immediately.
To further improve GPS accuracy insure the Wide Area Augmentation System (WAAS) option is enabled.  WAAS will improve accuracy to +/- 3 meters.  WAAS can be enabled from the same screen that DEMO was removed.  Notice the letter D on the satellite information page indicating signal reception; see the image below.
If the WAAS correction can’t be received the GPS will be accurate to +/- 15 meters.

More informaition relating to GPS Accuracy.

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