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| • | Likely
to be dominated by satellites at many |
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| frequencies,
both GSO and non-GSO. |
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| • | Problem
of the GSO belt. For several days, twice a |
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| year,
the sun may be unobservable at certain |
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| frequencies
as it passes behind the GSO belt, and |
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| strong
GSO satellite signals come into the main |
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| beam
of the FASR antennas. |
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| • | RFI
excision: before or after correlation? |
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| • | Does
RFI drive the digitization precision? |
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