The on-axis beam at Jicamarca: is it pointing correctly?
Abstract
Vertical velocity measurements of atmospheric winds are becoming increasingly important. To obtain the long-term mean vertical motion of the atmosphere is difficult to do, both because of the small velocities involved and because of the finite width of the antenna beam. Since the vertical wind measurement is very sensitive to the tilt of the vertically-directed antenna beam, we decided to get the Jicamarca beam direction by measuring the phase and amplitude of a reference signal at each of the antenna feed points. Our results tell us that, while the antenna pointing direction is already good, there is room for improvement.
Description
Date
1995
Keywords
Winds , Measurement , Antennas , Atmosphere , Jicamarca Radio Observatory
Citation
Chau, J. L., Balsley, B. B., Huamán, M. M., Castillo, O., & Woodman, R. F. (1995). The on-axis beam at Jicamarca: is it pointing correctly?.
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Publisher
Instituto Geofísico del Perú