| Accuracy
and Availability of WAAS for Precision Agriculture
In precision agriculture, global positioning system
(GPS) has made possible the accurate location of positions
in a field. The objective of the study was to evaluate
a static test of five different DGPS receivers for accuracy
of the WAAS differential corrected signal over a five-day
period. The receivers used in the study were Northstar
2501 NDGPS, Outback S, Satloc SLXg3, Starfire (John
Deere) and Trimble AgGPS 132. Over the 5-day experiment,
two of the WAAS receivers had sub-meter accuracy along
with the receiver with subscription service. The WAAS
signal can be used in precision agriculture with accuracies
comparable to subscription satellite service. Each receiver
should be evaluated individually to determine if the
WAAS signal will provide the needed accuracy for the
given precision agriculture operation.
Investigators: Matthew Sullivan, Reza Ehsani, Joel
T. Walker, Phil Levison, and Lixin Lang, Department
of Food, Agricultural and Biological Engineering
Contact: Matthew
Sullivan
back to Research 2001
| 2002
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