Difference between revisions of "Expected Survey Performance for Science Forecasting"

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(Observation Definition)
(Observation Definition)
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All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%.
 
All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%.
Please see this posting: http://bicep.rc.fas.harvard.edu/CMB-S4/analysis_logbook/20190607_LATSTM/ for a source of the white noise levels given here.
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Please see [http://bicep.rc.fas.harvard.edu/CMB-S4/analysis_logbook/20190607_LATSTM/ this posting] for a source of the white noise levels given here.
  
 
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All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%.  
 
All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%.  
To obtain the white noise levels given below, one should take the numbers in the first table under "Small-area Survey Performance Expectation 05" from https://cmb-s4.org/wiki/index.php/Survey_Performance_Expectations (scaled from achieved BK performance and to a 3% patch), which are given for a 1-4-4-3 tube configuration and 4 yrs of observation, scale to 2-6-6-4 tubes (i.e. divide by factors of sqrt(2/1), sqrt(6/4) and sqrt(4/3)), then further scale down by sqrt(3)/sqrt(2.88)*sqrt(1.32). This last factor comes from dividing out the initial scaling to 3%, and applying an extra ratio of (noise) f_sky for BK and the survey of interest (the 2.88 and 1.32 numbers can be found here http://bicep.rc.fas.harvard.edu/CMB-S4/analysis_logbook/20190511_sigmar_vs_r_galcuts/?&obseff=full&decorr=decorr_&decorr2=lineardecorr_&linlog=loglog&linlog2=loglog&maskname=mask_iwcov_tot_pole_deep_v1_&plots=plots&nmask2=5mask&fg=without&weight=optweight_v1&ntube=18&stat=AL&band=&minpole=&r=0&galmask=&morechilefg=_morechilefg&dustsync=Dust&galcut=58#permalink_fig7 by clicking "Pole Deep (v1)" and "04d")
+
To obtain the white noise levels given below, one should take the numbers in the first table under [https://cmb-s4.org/wiki/index.php/Survey_Performance_Expectations "Small-area Survey Performance Expectation 05"] (scaled from achieved BK performance and to a 3% patch), which are given for a 1-4-4-3 tube configuration and 4 yrs of observation, scale to 2-6-6-4 tubes (i.e. divide by factors of sqrt(2/1), sqrt(6/4) and sqrt(4/3)), then further scale down by sqrt(3)/sqrt(2.88)*sqrt(1.32). This last factor comes from dividing out the initial scaling to 3%, and applying an extra ratio of (noise) f_sky for BK and the survey of interest (the 2.88 and 1.32 numbers can be found [http://bicep.rc.fas.harvard.edu/CMB-S4/analysis_logbook/20190511_sigmar_vs_r_galcuts/?&obseff=full&decorr=decorr_&decorr2=lineardecorr_&linlog=loglog&linlog2=loglog&maskname=mask_iwcov_tot_pole_deep_v1_&plots=plots&nmask2=5mask&fg=without&weight=optweight_v1&ntube=18&stat=AL&band=&minpole=&r=0&galmask=&morechilefg=_morechilefg&dustsync=Dust&galcut=58#permalink_fig7 in this posting] by clicking "Pole Deep (v1)" and "04d")
  
 
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Revision as of 13:56, 7 June 2019

The most up-to-date expected survey performances (previously called "experiment definitions"), and all the historical ones used for iterating, for both large-area survey and small-area survey, can be found at Survey Performance Expectations.

Expected Survey Performances (a result of instrument performance and observations) below are the converged result at each epoch (or will be once someone fills them in).


DSR Reference Design

Instrument Definition

LAT

SAT

Observation Definition

Deep and Wide Field (Hi-res)


Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 75.8 69.3 61.6 53.9
Effective sky fraction for noise (in %) 70.9 64.8 57.3 50.1
Effective sky fraction for signal (in %) 66.2 60.6 53.3 46.5


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 21.8 12.4 2.0 2.0 6.9 16.7
ell knee TT 433 395 1315 4651 4511 4525
1/f exponent TT (uK-arcmin) -3.5 -3.4 -3.1 -2.3 -3.4 -3.4
white noise level E/B (uK-arcmin) 30.8 17.6 2.9 2.8 9.8 23.6
ell knee E/B 467 467 467 467 467 467
1/f exponent E/B (uK-arcmin) -1.1 -1.1 -1.1 -1.1 -1.1 -1.1

Hi-res Ultra-deep Field

All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%. Please see this posting for a source of the white noise levels given here.

Frequency (GHz) 20 30 40 95 145 220 270
Beam FWHM (arcmin) 11.0 7.3 5.5 2.3 1.5 1.0 0.8
white noise level E/B (uK-arcmin) 8.44 5.03 4.51 0.68 0.96 5.72 9.80
ell knee E/B 200 200 200 200 200 200 200
1/f exponent E/B -2.0 -2.0 -2.0 -2.0 -3.0 -3.0 -3.0
ell min 30 30 30 30 30 30 30
nside 512 512 512 512 512 512 512


Lo-Res Ultra-Deep Field

All numbers are defined for v1 of the pole deep survey described here, which has an effective sky fraction for noise of 2.88%. To obtain the white noise levels given below, one should take the numbers in the first table under "Small-area Survey Performance Expectation 05" (scaled from achieved BK performance and to a 3% patch), which are given for a 1-4-4-3 tube configuration and 4 yrs of observation, scale to 2-6-6-4 tubes (i.e. divide by factors of sqrt(2/1), sqrt(6/4) and sqrt(4/3)), then further scale down by sqrt(3)/sqrt(2.88)*sqrt(1.32). This last factor comes from dividing out the initial scaling to 3%, and applying an extra ratio of (noise) f_sky for BK and the survey of interest (the 2.88 and 1.32 numbers can be found in this posting by clicking "Pole Deep (v1)" and "04d")

Frequency (GHz) 30 40 85 95 145 155 220 270
Bandwidth (GHz) 9.0 12.0 20.4 22.8 31.9 34.1 48.4 59.4
Beam FWHM (arcmin) 72.8 72.8 25.5 25.5 22.7 22.7 13.0 13.0
white noise level TT (uK-arcmin) 5.64 7.14 1.41 1.24 2.71 2.90 7.50 12.85
ell knee TT 150 150 150 150 230 230 230 230
1/f exponent TT -4.4 -4.4 -4.4 -4.4 -3.8 -3.8 -3.8 -3.8
white noise level EE (uK-arcmin) 3.74 4.73 0.93 0.82 1.25 1.34 3.48 8.08
ell knee EE 60 60 60 60 65 65 65 65
1/f exponent EE -2.2 -2.2 -2.2 -2.2 -3.1 -3.1 -3.1 -3.1
white noise level BB (uK-arcmin) 3.53 4.46 0.88 0.78 1.23 1.34 3.48 5.97
ell knee BB 60 60 60 60 60 60 60 60
1/f exponent BB -1.7 -1.7 -1.7 -1.7 -3.0 -3.0 -3.0 -3.0
ell min 30 30 30 30 30 30 30 30
nside 512 512 512 512 512 512 512 512



CDT Design

Instrument Definition

LAT

SAT

Observation Definition

Delensing LAT

Wide-Area LAT

Pole SAT

Atacama SAT