Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993step.proc..233b&link_type=abstract
In National Central Univ., Solar-Terrestrial Energy Program: Proceedings of the 6th Workshop on Technical and Scientific Aspects
Astronomy and Astrophysics
Astronomy
Coherent Radar, Drift (Instrumentation), Drift Rate, Interferometry, Radar Antennas, Radar Data, Radar Scattering, Synthetic Aperture Radar, Antarctic Regions, Correlation, Frequency Ranges, Radar Range, Spatial Resolution, Temporal Resolution
Scientific paper
Simultaneous temporal, spatial, and frequency domain interferometry experiments were carried out on two medium frequency, spaced antenna radars operated by the Department of Physics and Astronomy, University of Canterbury. The radars are located near Christchurch New Zealand, (44 deg S, 173 deg E), and at Scott Base in the Antarctic, (78 deg S, 167 deg E). The radars are normally dedicated to continuous spaced antenna drifts observations of winds and scattering scales in the mesosphere and lower thermosphere as described by Fraser (1989). For this project the radars were converted to phase coherent mode and provision was made to control the operating frequency of the radars. A series of half hour observations were made over a week on the Antarctic radar and several series of two to five hour observations were made over eight months on the Christchurch radar. The altitude range probed was approximately 80 -105 km. The sampling period of one minute every second or third minute enabled study of short time scale phenomena such as gravity waves activity. The retention of the raw data collected at three coherent receivers as the radar was stepped through five different frequencies enabled the application and study of techniques such as Spaced Antenna Drifts (Full Correlation Analysis FCA), Spatial and Frequency Domain Interferometry (SDI & FDI), and scattering scale measurements. Aspects of the spaced antenna techniques (spaced antenna drifts and spatial domain interferometry), particularly as regards to velocity measurements, are discussed in a separate report in this volume.
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