By Gennady I. Belchansky
Energetic (imaging radar) and passive (radiometer) microwave structures are more and more used for Arctic ecological study. regrettably, before ecologists attracted to distant sensing usually lacked entry to the entire suite of actual and analytical strategies of microwave structures, information processing, and ecological functions simply because an appropriate reference publication didn't exist. Arctic Ecological examine from Microwave satellite tv for pc Observations solutions this call for by way of summarizing the most microwave satellite tv for pc functions for Arctic ecological study. This booklet is worthwhile to experts with a history in microwave options, in addition to to different ecologists drawn to purposes of microwave lively and passive distant sensing for tundra, boreal wooded area, and Arctic sea-ice habitat and marine mammal experiences. It provides a quick creation to Arctic ecological difficulties, the position of satellite tv for pc sensing for tracking Arctic ecosystems, and similar info processing functions. the amount then examines result of Arctic sea-ice habitat experiences utilizing OKEAN-01 satellite tv for pc facts, then presents a comparative research of multisensor satellite tv for pc tracking of habitat utilizing OKEAN-01, SSM/I and AVHRR satellite tv for pc tools. It additionally describes the overview of relative info content material of ALMAZ-1, ERS-1, JERS-1 SAR, and Landsat-TM info for deciding upon rainy tundra habitats. The publication concludes with result of delicate boreal wooded area variety detection to observe strength affects of weather switch on boreal woodland constitution.
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Extra resources for Arctic Ecological Research from Microwave Satellite Observations
Some aspects associated with sea ice, tundra and boreal forest habitats have been identified in a series of publications. However, more studies are required to evaluate the diversity of methods for processing and analyzing imaging radar and passive microwave data in the context of specific ecological applications and system characteristics. The next chapters include some results of microwave data applications for Arctic ecology studies. H. , 1985. Thermohaline circulation in the Arctic mediterranean seas.
Thus, the selection of real aperture radar and microwave radiometer frequency is influenced by resolution, atmospheric effects and an object’s scattering and emittance characteristics. ). ) are used to further characterize the surface properties. 3 ELEMENTS OF IMAGING RADAR SATELLITE SYSTEMS Imaging radar satellite systems provide high- (synthetic aperture radar) and middle- (real aperture radar) resolution all-weather images of ocean, land and ice surfaces. The SAR and RAR are side-looking radar (SLR) systems (Curlander and McDonough, 1991).
In a comparison of the neural network and the statistical classification of the remote sensing data, the neural network is superior to the statistical method in terms of classification accuracy, however, the time necessary for training is a problem. Recent work shows that optimized training methods can reduce the training time. Fung (1994) presents examples of how electromagnetic scattering and emission models can be used in conjunction with neural networks and unsupervised classification methods to perform retrieval of parameters and classification from remote sensing data.
Arctic Ecological Research from Microwave Satellite Observations by Gennady I. Belchansky