Summary of LFI data characteristics

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Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper Include Planck DPC Paper 2018.


Table 1. LFI performance parameters
Parameter 30 GHz 44 GHz 70 GHz
Centre frequency [GHz] 28.4 44.1 70.4
Scanning beam FWHMa [arcmin] 33.10 27.94 13.08
Scanning beam ellipticitya 1.37 1.25 1.27
Effective beam FWHMb [arcmin] 32.29 (TBC) 27.00 (TBC) 13.21 (TBC)
White noise level in timelinesc [μKCMB s1/2] 147.9 174.0 151.9
fkneec [mHz] 113.9 53.0 19.6
1/f slopec -0.92 -0.88 -1.20
Overall calibration uncertaintyd [%] 0.17 0.12 0.20

a Determined by fitting Jupiter observations directly in the timelines.

b Calculated from the main beam solid angle of the effective beam, Ωeff = mean(Ω). These values are used in the source extraction pipeline (Planck-2015-A26[1]).

c Typival values derived from fitting noise spectra

d difference between first and last iteration of the iterative calibration (for 30 and 44 GHz) or E2E 2015 result (for 70 GHz). In 2015 the calibration uncertainity was 0.35% and 0.26 % at 30 and 44, respectively.


References[edit]

(Planck) Low Frequency Instrument

Data Processing Center

Full-Width-at-Half-Maximum

To be confirmed

Cosmic Microwave background