دانلود رایگان مقاله ادغام سنسور فراطیفی در بررسی سیستم هوا از راه دور

abstract

Remote sensing is the science and art of obtaining information about an object, area or phenomenon starting from the data obtained through a device or instrument without any physical contact with it. These sensors capture electromagnetic energy that comes to them from the reflection or emission of the objects on the Earth’s surface, and convert it into an electronic signal that once conditioned, is recorded in some kind of support for further processing and analysis. On the other hand, the field of remotely piloted Aircraft systems, also called drones, has undergone tremendous growth in recent years. There is a possibility to integrate these remote sensing cameras on-board of them. The result is a remote sensing system applicable in the atmospheric, terrestrial and marine environment allowing a systematic analysis of many geophysical parameters of high interest to researchers, businesses, Government and the public community. The present document explains the integration process of remote hyperspectral sensors on-board of an unmanned aircraft system as an investigation aerial platform. Once sensor is fully integrated in the Aircraft, next step is the qualification of the system, military or civilian. The integration ends obtaining the airworthiness certificate. Lastly, to conclude, future lines of research are exposed.

8. Future research

lines LiDAR (Light Detection And Ranging) [16,17] is a system that allows to obtain a cloud of points on the ground took them by airborne laser scanner. To perform this scan two movements are combined. One longitudinal given by the path of the airplane and other cross using a mobile mirror that deflects the laser beam emitted from the scanner. To know the coordinates of the point cloud, the sensor position and the angle of the mirror at all times are needed. Therefore the LiDAR technology is assisted by the GPS technology and the IMU to collect altitude data. Known these data and sensor-field distance obtained with the EDM (Electronic Distance Meter) one can obtain the required coordinates. The result is tens of thousands of points per second. These data are used to de ne the ground surface and generate digital elevation models. The use of this technology has advantages over the capture with conventional methods: requires minimum geodesic ground control and data have a higher density and higher precision. A future research line could be the integration of a LiDAR system in Milano PAI platform. The result of this instruments fusion will be a unique system that permits simultaneous measurements of vegetation structure, foliar spectra and surface temperatures. Nowadays multiple LiDAR options can be found in the market. A proposed option is the RIEGL VQ-580 system. It is a very compact and lightweight scanner, mountable in any orientation and even under limited space conditions as on-board RPAS. The instrument only needs one power supply and provides line scan data via the integrated LAN-TCP/IP interface. With a very low consumption, only 65 W, with dimensions of 36×21×22 cm (length × width × height) and a weight of 13 kg, this product joint to the hyperspectral sensor will produce a compact and lightweight system that can be used to support a huge number of Earth Science research projects.