The Autonomous Detection of Tree Position with Different GPS Devices for the Need of Early Apple Yield Forecast
نویسندگان
چکیده
The accuracy of different GPS devices for sampling of trees required for the early yield forecast was studied in two years’ campaign. In our experiment March II, PDA ASUS P565 and Nokia 5800 XpressMusic were used. To determine the positions and their accuracy, 245 randomly trees were selected from 245 orchards. We found out that the measurements made in two years with MARCH II deviated in average in diagonal for 16.72 m, in ASUS P565 for 15.41 m and in Nokia 5800 XpressMusic for 46.14 m. ASUS P565 was found to be the most accurate device because the two season’s measurements deviated in average in diagonal only for 1.31 m from MARCH II, but there was no significant difference. Despite the fact that discrepancies in individual trees were minimal (0.33 m) in particular measurement, those two devices are not precise sufficiently to identify unequivocally the position of sample trees.
منابع مشابه
The possibility of autonomous detection of tree position with GPS for the need of early apple yield forecast
The accuracy of different GPS devices for precise sampling of trees needed for early yield forecast was studied in two years campaign. The precise positioning is fundamental for the comparison of yields between different years. In our experiment we used GPS devices MarchII, ASUS P565 and Nokia 5800 XpressMusic, which represented different precision and price ranges. To determine the positions a...
متن کاملA Hierarchical SLAM/GPS/INS Sensor Fusion with WLFP for Flying Robo-SAR's Navigation
In this paper, we present the results of a hierarchical SLAM/GPS/INS/WLFP sensor fusion to be used in navigation system devices. Due to low quality of the inertial sensors, even a short-term GPS failure can lower the integrated navigation performance significantly. In addition, in GPS denied environments, most navigation systems need a separate assisting resource, in order to increase the avail...
متن کاملInvestigation of Some Vegetative and Reproductive Characteristics of Five Apple Cultivars in ‘Guttingen V’ System
Orchard intensification is motivated by the desire to produce fruit early in the life of the orchard to rapidly recover establishment costs. Intensification is possible using dwarfing rootstocks that control tree size, induce early cropping and produce large quantities of fruit compared to the amount of wood produced. Therefore, this study attempts to compare some yield and fruit properties of ...
متن کاملEffect of Time and Amount of Supplemental Irrigation at Different Distances from Tree Trunks on Quantity and Quality of Rain-fed Fig Production
Supplemental irrigation under prolonged drought conditions has a key role in providing water for transpiration of rain-fed fig trees. The effect of different times and amounts of supplemental irrigation at different distances from the tree trunk on quantity and quality of Estahban rain-fed fig production was evaluated during two years. A randomized complete block design with four replications o...
متن کاملInvestigating the effects of climate change on the pattern of heat accumulation in apple trees cultivation areas in Iran during the future period
Climate change stand as the most important challenge in the future. Horticulture is one of the most sensitive and vulnerable sectors to the climate change. Climate change and global warming will endanger the production of agricultural products and food security. Because of required longer time to fruit production, fruit trees are heavily susceptible to damage from climate change. The purpose of...
متن کامل