Applications of Remote Sensing to Agrometeorology: by Ph. Hartl (auth.), F. Toselli (eds.)

By Ph. Hartl (auth.), F. Toselli (eds.)

Within the framework of Ispra classes, a direction on "Applications of distant Sensing to Agrometeorology" used to be held from April sixth to tenth, 1987 on the Joint learn Centre of the eu groups, Ispra Italy. the aim of the direction used to be to familiarize scientists, lively in Agrometeorology and similar fields, with distant sensing concepts and their power functions of their respective disciplines. traditional floor investigations in a number of fields of common sciences equivalent to hydrology, pedology and agrometeorology could be supple­ mented by way of a number of tools carried by way of airborne or earth orbiting systems. the previous few years, specifically, have visible many advancements during this appreciate and a transforming into volume of knowledge can now be derived not just from devoted earth assets satellites similar to the LANDSAT and see, but additionally from different structures comparable to METEOSAT and the sequence of NOAA-TIROS. destiny structures (ERS-l, area Station, etc.) with their complex sensors will extra develop the diversity of purposes open to the investigators. using those information resources, including box investigations, can lead, at a discounted fee, to a greater characterization of the spatial and temporal houses of typical systems.

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Extra info for Applications of Remote Sensing to Agrometeorology: Proceedings of a Course held at the Joint Research Centre of the Commission of the European Communities in the Framework of the Ispra-Courses, Ispra, Varese, Italy, 6–10 April 1987

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In the future one can expect that many electro-optical scanners (pushbroom scanners) will be used. Examples of this type are the SPOT and the MOS scanning systems and the MOMS system (Figure 8). This type of scanner is, in principle, a linescanner. The advantages of the pushbroom scanners are the following: they do not have rotating mechanical parts and they associate a single pixel to a single detector per line. Therefore, the dwell time for this detector to a single point of the surface is equivalent to the time which was allowed by the mechanical scanner to the whole line.

EMITTER 7 InA. OPI LE II rbSnT. nOK 7f'K lOO"K lOO"K lOOoK lOO"K 7t'K Spectral response of detectors. 2 Telescope. The optical telescope consists either of a lens system or a reflective mirror system. The main parameters which describe its features are the following: The aperture A. It defines the geometric size of the light collecting input of the optic. If a lens or mirror is circular and of diameter 0, then the aperture is TIo2 times its efficiency, which is smaller than 1. - The "instanteneous field of view" IFOV is about AID in rad.

This improvement can be used, for example, to increase the geometric resolution. There is still a disadvantage at present: the number of elements per array is still limited and the arrays are not available yet for the whole spectral band from the visible up to the thermal infrared. But with the dramatic progress in integrated electro-optics one can hope that this disadvantage will no longer exist in the next decade. 4 Imaging Spectrometry The push broom scanners have, so far, very limited numbers of spectral channels.

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