The results are presented from a technological experiment on computer-based digital transmission of Soviet satellite imagery via telephone lines from Moscow to Helsinki. The images have been used for real time sea ice mapping purposes.Particular features of the specific hardware and software are outlined. Time and cost values of the satellite data transmission via standard common-use telephone lines are given. The assessment for effectivity of experiment technologies for operational purposes in Finland is given. The system has been tested for aiding in the operational ice charting in the Baltic Sea. Also a particular test was performed in connection with the Finnish Antarctic expedition FI"ARPS9.Examples of transmitted images and technology exploitation features are presented. The ways to improve the telephone line image transmission technology are outlined. 829

Most of the existing methods for detection of explosives require sampling and sample preparation, whereas in the search for explosives, it is not always possible to contact the explosive device (ED). In this connection, the methods for remote detection of explosives by detecting their particles present in various quantities near or on the surface of the explosive are of particular interest. The difficulty of detecting such substances lies in the fact that, in addition to full-scale samples, they may be in the package. In addition, it often becomes necessary to detect a trace amount of hazardous substances on packages and contact surfaces. The purpose of the article is to study the possibility of improving the accuracy of lidar measurements of the concentration of particles of explosives, taking into account the width of the laser emission line and the absorption width of the molecule under study.

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