(instrument on 1980s Soviet satellite to view the CMB)
RELIKT-1 was an instrument (or experiment) on the USSR satellite,
Prognoz 9, launched in 1983. The instrument's purpose was to map
radio the range of the CMB. It mapped the sky at
37GHz with an angular resolution of 5.5 degrees, and resulted
in the announcement of CMB anisotropies.
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