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PLANCK :Planck is a mission of the European Space Agency - ESA. The main objective of Planck was to measure the spatial anisotropies of the temperature of the CMB, with an accuracy set by fundamental astrophysical limits.
PLANCK/LFI :The Planck-LFI instrument is an array of 11 radiometric receivers in the Ka, Q, and V bands, with centre frequencies close to 30, 44, and 70 GHz.

PLANCK/LFI.070GHz4.3e+74.34e+74.23e+73.63e+75.21e+77.15e+60.0001782.98e-24PLANCKLFIPLANCK LFI 70GHz spectral response
PLANCK/LFI.044GHz6.83e+76.87e+76.77e+76.0e+77.73e+74.91e+66.94e-54.54e-25PLANCKLFIPLANCK LFI 44GHz spectral response
PLANCK/LFI.030GHz1.06e+81.07e+81.05e+88.64e+71.26e+81.05e+72.81e-57.7e-26PLANCKLFIPLANCK LFI 30GHz spectral response

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