validation of the radiation pattern of the middle atmosphere alomar radar system (maarsy)
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2012
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Abstract
In 2009/2010 the Leibniz-Institute of Atmospheric Physics (IAP) installed a
new powerful VHF radar on the island Andøya in Northern Norway
(69.30° N, 16.04° E). The Middle Atmosphere Alomar Radar
System (MAARSY) allows studies with high spatial and temporal resolution in
the troposphere/lower stratosphere and in the mesosphere/lower thermosphere
of the Arctic atmosphere. The monostatic radar is operated at
53.5 MHz with an active phased array antenna consisting of 433 Yagi
antennas. Each individual antenna is connected to its own transceiver with
independent phase control and a scalable power output of up to 2 kW,
which implies high flexibility of beam forming and beam steering. During the
design phase of MAARSY several model studies have been carried out in order
to estimate the radiation pattern for various combinations of beam forming
and steering. However, parameters like mutual coupling, active impedance and
ground parameters have an impact on the radiation pattern, but can hardly be
measured. Hence, experiments need to be designed to verify the model results.
For this purpose, the radar has occasionally been used in passive mode,
monitoring the noise power received from both distinct cosmic noise sources
like e.g. Cassiopeia A and Cygnus A, and the diffuse cosmic background
noise. The analysis of the collected dataset enables us to verify beam
forming and steering attempts. These results document the current status of
the radar during its development and provide valuable information for further
improvement.
| Reference Key |
renkwitz2012advancesvalidation
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|---|---|
| Authors | ;T. Renkwitz;W. Singer;R. Latteck;G. Stober;M. Rapp |
| Journal | neuropsychiatrie : klinik, diagnostik, therapie und rehabilitation : organ der gesellschaft osterreichischer nervenarzte und psychiater |
| Year | 2012 |
| DOI |
10.5194/ars-10-245-2012
|
| URL | |
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