Difference between revisions of "Summary LFI"

From Planck Legacy Archive Wiki
Jump to: navigation, search
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
 
{{DISPLAYTITLE:Summary of LFI data characteristics}}
 
{{DISPLAYTITLE:Summary of LFI data characteristics}}
Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper <span style="color:red"> Include Planck DPC Paper 2018</span>.
+
Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper {{PlanckPapers|planck2016-l02}}.  
 
 
  
 
{| border="1" cellspacing="0" cellpadding="2" align="center"
 
{| border="1" cellspacing="0" cellpadding="2" align="center"
Line 15: Line 14:
 
|width="100" | 44.1
 
|width="100" | 44.1
 
|width="100" | 70.4  
 
|width="100" | 70.4  
 +
|-
 +
|width="320" | Bandwidth [GHz]
 +
|width="100" | 9.89
 +
|width="100" | 10.72
 +
|width="100" | 14.90
 
|-
 
|-
 
|width="320" | Scanning beam FWHM<sup>a</sup> [arcmin]
 
|width="320" | Scanning beam FWHM<sup>a</sup> [arcmin]
Line 27: Line 31:
 
|-
 
|-
 
|width="320" | Effective beam FWHM<sup>b</sup> [arcmin]
 
|width="320" | Effective beam FWHM<sup>b</sup> [arcmin]
|width="100" | 32.29 (TBC)
+
|width="100" | 32.29  
|width="100" | 27.00 (TBC)
+
|width="100" | 27.00  
|width="100" | 13.21 (TBC)
+
|width="100" | 13.22
 
|-
 
|-
 
|width="320" | White noise level in timelines<sup>c</sup> [&mu;K<sub>CMB</sub> s<sup>1/2</sup>]
 
|width="320" | White noise level in timelines<sup>c</sup> [&mu;K<sub>CMB</sub> s<sup>1/2</sup>]
Line 52: Line 56:
 
|-
 
|-
 
|}
 
|}
 +
 +
 
  
 
<sup>a</sup> Determined by fitting Jupiter observations directly in the timelines.
 
<sup>a</sup> Determined by fitting Jupiter observations directly in the timelines.
Line 58: Line 64:
 
<!-- {{PlanckPapers|planck2013-p05}} -->  
 
<!-- {{PlanckPapers|planck2013-p05}} -->  
  
<sup>c</sup> Typival values derived from fitting noise spectra
+
<sup>c</sup> Typical values derived from fitting noise spectra
  
<sup>d</sup> 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.
+
<sup>d</sup> 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.
  
  

Latest revision as of 16:00, 5 July 2018

Quantification of the performance of LFI is summarized in Table 1 below. All the details can be found in the LFI data processing paper Planck-2020-A2[1].

Table 1. LFI performance parameters
Parameter 30 GHz 44 GHz 70 GHz
Centre frequency [GHz] 28.4 44.1 70.4
Bandwidth [GHz] 9.89 10.72 14.90
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 27.00 13.22
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[2]).

c Typical 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

Full-Width-at-Half-Maximum

Cosmic Microwave background