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Fig. 3
The GBT subreflector and feed arm seen from the secondary focal point atop the receiver room. The screen redirects feed spillover away from the arm and down into the main reflector.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.