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Australia Telescope Compact Array
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Shadowing Diagrams
The hour angle range that the ATCA can observe is limited by
the horizon of the antennas (12o). Additionally,
in some configurations, some antennas shadow others. In east-west
configurations, shadowing happens for a range of declinations
between +30o and -47o for spacings which are
61 m or shorter. For hybrid configurations, the shadowing is more
complex.
The following diagrams give the range to hour angles where a
given source is above the horizon and unshadowed: the grey areas are the
areas of unobstructed observing.
Horizon/shadowing diagram for east-west configurations (also see a
postscript version).
Horizon/shadowing diagram for the H75 configuration (also see a
postscript version).
Horizon/shadowing diagram for the H168 configuration (also see a
postscript version).
Horizon/shadowing diagram for the H214 configuration (also see a
postscript version).
Original: Bob Sault (21-May-2003)
Modified: Bob Sault (21-May-2003)