Planck-LFI
Low Frequency Instrument
Mapping the first light in the Universe
Marco Bersanelli, University of Milano
Darmstadt
19 March 2009

Planck-LFI: Wavelength range
44 GHz
30 GHz 44 GHz
30 GHz 44 GHz 70 GHz
30 GHz
70 GHz
70 GHz
30, 44 GHz: Monitor Galacic emission at low frequency
70 GHz: Cleanest window for CMB

Planck-LFI: Differential Radiometers
Unprecedented performances:
– Sensitivity (ΔT/T ∼ 3 × 10-6/pix)
– Stability (fK ∼ 10-2 Hz)
Sky signal
4K
20K
Ref signal
Difference
300K
Document title | Author Name | Place | Data doc | Programme | Pag. 3

(animation, 27MB)
THANK YOU
Name Surname
Author Title
name.surname@esa.int

Planck-LFI: Instrument Calibration
Unit Assembly Instrument Satellite In-flight
CSL Campaign
LFI
HFI
Qualification Model (QM)
Qualification Model (QM)
Completed
Completed Completed Completed Completed
Completed Completed Completed
Flight Model (FM)
Flight Model (FM)
Completed
Completed Completed Completed Ready
Completed
Completed Completed Completed Ready
Supported by Data Processing Center