<i>Planck</i>pre-launch status: Design and description of the Low Frequency Instrument
<i>Planck</i>pre-launch status: Design and description of the Low Frequency Instrument
In this paper we present the Low Frequency Instrument (LFI), designed and developed as part of the Planck space mission, the ESA program dedicated to precision imaging of the cosmic microwave background (CMB). Planck-LFI will observe the full sky in intensity and polarisation in three frequency bands centred at 30, …