P.A. Amirault, D. G. Alward, W. G.R. Brennan, D. C. Davies, C. A. Dixon and A. L. Staples.
During the period of l99l-95 Forest Protection Limited tested Differential Global Positioning Systems (DGPS) for navigational purposes and Data-Logging systems to record operational parameters during aerial application programs. A variety of hardware and software was employed on both fixed- and rotary-wing aircraft on forest insect control and vegetation management projects. In time, difficulties relating to the systems themselves and user understanding of their limitations and operation were overcome. The use of DGPS progressed to the point where the two systems (TRIMFLIGHT and AgNav) being evaluated were providing superior guidance relative to the former aerial flagging system. Data logged during the same operations gave feedback on atmospheric conditions and aircraft and spray system performance. Included among the factors to consider in purchasing/ implementing a DGPS system are reliability; serviceability; user friendliness, support and training.