I.V. Bragin

Radiometric method of detection of biological objects covered by vegetation

Materials about possibilities of object detection, correlated with its radiobrightness contrast to surroundings, are presented. The results of investigation of possibilities of biological object detection for objects, shaded by vegetation, are presented. The conclusion was made, that biological object (a man), shaded by vegetation, can be detected from a distance up to 1.5 km, if attenuation of electromagnetic waves, correlated with vegetation, is not more -25 dB. The experimental results of object detection are presented.

Applications of Passive Microwave Devices for Imaging System Designed for Detecting Objects in Soils

The paper deals with some grounding in theory of a passive radiometric complex designed to detect from a helicopter metal and non-metal objects in the soil at the depth of several metres. Experimental results obtained during tests of a complex prototype are presented as well. The complex can be applied in construction and repair works to detect underground utility systems. The complex is of particular interest for the detection of land mines which armed conflicts are left after their completion.

Waveguide diplexer using E-plane tee of improved symmetry

It is proposed to use, in waveguide diplexers, an E-plane T-junction of improved symmetry for better performance. The characteristics of a waveguide diplexer with the conventional E-plane T-junction and the symmetrized one are compared.

Receiving system of the millimeter-wave band multichannel scanning radiometer

The problems of a constructive realization and basic parameters of the units (modulator and mixer) of the receiving system of the multichannel scanning radiometer MWRI for the millimeter-wave band are considered.

Remote detection of objects in soil using a microwave and IR scanner

The paper deals with some grounding in theory of a passive radiometric complex of microwave and IR ranges designed to detect from a helicopter metal and non-metal objects in the soil at a depth of several metres. Experimental results obtained during tests of a complex prototype are presented. The complex can be applied in construction and repair works to detect underground utility systems. The complex is of particular interest for the detection of land mines which were left after the completion of armed conflicts.

On-board radiometer calibration and determination of the errors of measurement of radio-brightness temperature of the underlying surface during space monitoring of the earth

In this article the authors give the analysis factors that cause errors of radio-brightness temperature measurement during the space monitoring of the Earth by on-board radiometers, methods of ground and on-board calibrations, and the example of evaluation of the radio-brightness temperature measurement by the on-board radiometric complex.

Results of Development of Radiometric Receivers mm and Submillimeter Range

Results of development of space-based radiometric receivers in a frequency range 10 GHz ... 206 GHz is considered. Are resulted technical characteristics the developed radiometric systems intended for remote sensing of a surface of the Earth (including ocean) and atmosphere. Results of flight measurements also are submitted.

Passive microwave complex of remote sensing for the detection of objects in the soil

The paper deals with some grounding in theory of a passive radiometric complex designed to detect from a helicopter metal and non-metal objects in the soil at a depth of several metres. Experimental results obtained during tests of a complex prototype are presented as well. The complex can be applied in construction and repair works to detect underground utility systems. The complex is of particular interest for the detection of land mines which armed conflicts leave after their completion.

Error of measurement of radio-brightness temperature of the underlying surface during space monitoring of the Earth

The authors consider the main components of the error of measurement of the radio-brightness temperature of the Earth, including the background radiation of the Sun, and give an example of calculation for different reception frequencies.

Space-based millimeter- and submillimeter-wave radiometric for impact monitoring

The authors consider the design of a space system for detecting gas pollution of the atmosphere. The authors propose to use this system for checking observation of international agreements. The authors give the example of the equipment for checking the concentration of CO, CO/sub 2/, NO, SO/sub 2/, describe the construction and the block diagram of the multi-channel scanning radiometer and give the calculation of the error of measurement of harmful gas concentration in the atmosphere.