COLD LAKE RADIO PROPAGATION AND METEOROLOGICAL EXPERIMENT. VOLUME I. DESCRIPTION OF A RADIO-METEOROLOGICAL EXPERIMENT TO MEASURE RAY-PATH BENDING IN THE TROPOSPHERE WITH A VERTICAL INTERFEROMETER
MITRE CORP BEDFORD MA
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The purpose of the experimental program described in this report was to determine the direct relationship between meteorological and radio- propagation measurements and then to evaluate the validity of radio- meteorological results for predicting the radio-propagation conditions. The meteorological information was derived from radiosonde measurements and airborne microwave refractometer data. The radio experiments were based on the vertical interferometer technique, in which a single airborne transmitter S and L Band was used to establish an interference pattern at the ground-based receiver, due to the combination of direct and lake-surface-reflected signals. Extreme accuracy in the measurements of the parameters involved, in particular in the interferometer experiment, was the keynote to success. The close agreement between the effective earths radius value obtained from the meteorological measurements and the interferometer technique indicates that this type of radio interferometer can provide meaningful and surprisingly accurate information on the radio propagation conditions. The results also indicate that the radiosonde data, if sufficient care is taken to calibrate it before launch, can give very satisfactory information about radio propagation conditions.
- Atmospheric Physics
- Radio Communications