Introduction
Test Courses
Powell, ID, Test Course
Lubrecht, MT, Test Course
Clackamas, OR, Test Course
Test Procedure
Receivers Tested
Rockwell PLGR +96
Garmin GPS III+
Trimble Pro XR
Trimble GeoExplorer 3
Magellan Map 410
Results
Postprocessing
Effect of Signal-to-Noise Ration
Effect of Position Dilution of Precision (PDOP)on Accuracy
Effect of Using External Antennas on Receivers
PLGR+96 Receiver Maintains Higher Accuracy Under the Forest Canopy
Real-Time and Postprocessed Positions
Effect of Battery Voltage
Discussion
Observations About the Receivers Tested
Summary
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