Low Altitude Remote Sensing Applications for Diversified Farming Conditions in Developing Countries: An Overview

Abstract

Satellite-based remote sensing technology has eased the difficulty in collecting crop and soil information required in large areas for the precision agriculture (PA) adoption but failed in terms of image quality, timeliness, weather sensitivity, high cost etc. to produce expected results, especially for small and medium farm holdings with diversified and mixed cropping practices in most developing countries. Out of many platforms such as ground-based vehicle platforms and unmanned radiocontrolled helicopter platforms, Low-Altitude Remote Sensing (LARS) system found to be capable of effectively replacing the conventional satellite based remote sensing systems fulfilling the vital necessities at an affordable price. Image acquisition system mounted on the platform being controlled from the ground can provide user with specified and near-real time images for quick assessment of the crop and soil status leaving enough time for growers to take preventive measures. The use of wide ariety of sensor combinations for image acquisition, location identification in terms of attitude and altitude etc. could make the system more flexible for specific applications, system integrations and total cost optimisation. The spectral indices and ratios obtained through LARS systems are capable of representing the soil and crop status more precisely for model development and predictions. There is also immense scope of using LARS system for disaster management in terms of disaster prediction, assessment and mitigation of socio-economic activities. The paper outlines different LARS systems and their configurations, scope and potential applications for general and specific conditions. [ABSTRACT FROM AUTHOR]