|Sudduth, Kenneth - Ken|
Submitted to: ASAE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 5/16/2005
Publication Date: 7/18/2005
Citation: Shannon, D.K., Sudduth, K.A. 2005. Performance of lower cost GPS receivers for GPS-aided guidance [abstract] [CDROM]. American Society of Agricultural Engineers Annual International Meeting. Abstract No. 051090.
Technical Abstract: GPS-aided guidance allows producers to apply fertilizer and pesticides more efficiently and accurately with the elimination of skips and overlaps between swaths. However, the GPS receivers usually sold for this purpose are expensive, and producers have pointed to the investment cost of equipment as being the major obstacle to adopting precision agriculture. With the availability of lower- cost GPS receivers, producers have asked if this type of receiver can be used for GPS-aided guidance. To answer this question, we conducted research during the fall of 2004. A low-cost Garmin 16A 5- Hz WAAS differential GPS receiver was compared to a Raven Invicta 210 10- Hz differential GPS receiver, a model commonly used for GPS-aided guidance. Preliminary tests were conducted by traversing parallel swaths 4.6 m apart and approximately 200 m in length. To compare the relative performance of the two GPS receivers, cross-track error was calculated as the difference between the actual location of the GPS receiver and the theoretical parallel swath. The Garmin 16A GPS receiver had a mean cross-track error of 29 cm and the Raven Invicta 210 GPS receiver had a mean cross-track error of 34 cm. These very similar errors indicate the potential for using a lower cost GPS receiver in some GPS-aided guidance applications.