Variations and Spectral Distribution of Infrasonic Noise in the Atmosphere

The present paper describes the results of experimental investigations of background infrasonic pressure fluctuations performed in Tomsk as part of the infrasonic monitoring program.     

Pulse Sensing of a Forest Canopy

Results of experimental investigations into the effects arising in the detection and ranging of the earth's forest cover with the use of pulse ultrabroadband radio-frequency radiation are described. A narrow-beam transmitting and receiving antennas oriented at a sliding angle to the forest canopy were mounted on a special mast at an altitude of 21 m above the ground. A corner-cube reflector was used to align and to calibrate the measurement system. The results obtained are compared with the data of independent biometric measurements.