WAFTT results part 3

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Summary

In this posting we study the effects of different scan strategies in the presence of atmospheric effects on the forecasts of Neff.

Depth maps

Total depth 095GHz.png

Rows are minimum observing elevations of 30, 40 and 50 degrees.

Columns are no elevation penalty, with elevation penalty, and high cadence.

Noise characteristics for minimum elevation of 50 degrees

No elevation penalty

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 56.8 52.0 45.2 38.9
Effective sky fraction for noise (in %) 51.6 47.1 40.8 34.8
Effective sky fraction for signal (in %) 47.3 43.0 37.2 31.6


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 7.8 9.1 1.2 1.7 6.3 10.8
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) 11.0 12.8 1.7 2.4 8.9 15.3
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

With elevation penalty

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 56.8 52.0 45.2 38.8
Effective sky fraction for noise (in %) 51.1 46.6 40.4 34.3
Effective sky fraction for signal (in %) 45.9 41.7 36.0 30.6


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 7.6 8.9 1.2 1.6 6.2 10.6
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) 10.8 12.5 1.7 2.3 8.7 15.0
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

High cadence survey - 2 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 57.9 52.7 45.6 39.4
Effective sky fraction for noise (in %) 47.3 43.1 37.1 31.7
Effective sky fraction for signal (in %) 38.2 34.8 30.0 25.3


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 7.5 8.8 1.2 1.6 6.0 10.4
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) 10.6 12.4 1.7 2.3 8.5 14.7
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

High cadence survey - 11 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 59.7 54.4 47.2 40.8
Effective sky fraction for noise (in %) 53.9 49.2 42.5 36.6
Effective sky fraction for signal (in %) 48.3 44.1 37.9 32.5


Frequency (GHz) 30 40 90 150 220 270
white noise level TT (uK-arcmin) 8.2 9.7 1.3 1.8 6.7 11.5
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) 11.5 13.7 1.8 2.5 9.4 16.3
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

Noise characteristics for minimum elevation of 40 degrees

No elevation penalty

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 68.2 62.5 55.1 48.1
Effective sky fraction for noise (in %) 63.5 58.3 51.2 44.5
Effective sky fraction for signal (in %) 59.2 54.3 47.5 41.1


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 8.7 10.4 1.4 1.9 7.2 12.4
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) 12.3 14.7 2.0 2.7 10.1 17.6
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
Penalty (relative to f_sky scaling) 1.01 1.03 1.02 1.02 1.03 1.03

With elevation penalty

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 68.2 62.6 55.2 4812
Effective sky fraction for noise (in %) 61.3 56.2 49.3 42.7
Effective sky fraction for signal (in %) 54.9 50.2 43.8 37.7


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 8.4 9.8 1.3 1.8 6.8 11.6
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) 11.9 13.8 1.9 2.5 9.6 16.4
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
Penalty (relative to f_sky scaling) 1.00 1.01 1.01 1.01 1.01 1.01

High cadence survey - 2 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 67.6 61.4 53.9 46.8
Effective sky fraction for noise (in %) 58.6 53.3 46.4 39.4
Effective sky fraction for signal (in %) 50.0 45.5 39.4 33.8


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 8.5 10.3 1.4 1.9 7.1 12.4
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) 12.0 14.6 1.9 2.6 10.0 17.5
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
Penalty (relative to f_sky scaling) 1.03 1.06 1.04 1.04 1.06 1.07

High cadence survey - 11 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 69.8 63.6 56.0 48.7
Effective sky fraction for noise (in %) 62.6 56.9 49.7 43.1
Effective sky fraction for signal (in %) 55.6 50.6 43.9 37.9


Frequency (GHz) 30 40 90 150 220 270
white noise level TT (uK-arcmin) 9.0 11.0 1.5 2.0 7.6 13.3
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) 12.8 15.6 2.1 2.8 10.7 18.8
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
Penalty (relative to f_sky scaling) 1.03 1.06 1.05 1.04 1.06 1.07

Noise characteristics for minimum elevation of 30 degrees

No elevation penalty

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) 9.5 11.5 1.5 2.1 7.9 13.8
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) 13.4 16.3 2.2 2.9 11.2 19.6
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
Penalty (relative to f_sky scaling) 1.04 1.08 1.06 1.06 1.07 1.09


With elevation penalty

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 75.8 69.3 61.6 53.9
Effective sky fraction for noise (in %) 66.1 60.5 53.3 46.4
Effective sky fraction for signal (in %) 57.6 52.7 46.1 39.8


Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 8.8 10.2 1.4 1.9 7.1 12.2
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) 12.5 14.5 2.0 2.7 10.0 17.3
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
Penalty (relative to f_sky scaling) 1.00 1.02 1.01 1.01 1.02 1.02


High cadence - 2 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 75.3 68.3 60.3 52.6
Effective sky fraction for noise (in %) 65.5 59.5 52.2 45.5
Effective sky fraction for signal (in %) 54.1 49.2 42.7 37.4
Frequency (GHz) 30 40 95 145 220 270
white noise level TT (uK-arcmin) 9.6 12.0 1.6 2.1 8.2 14.5
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) 13.6 17.0 2.2 3.0 11.6 20.5
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
Penalty (relative to f_sky scaling) 1.08 1.17 1.13 1.12 1.15 1.18

High cadence - 11 elevations

Galactic cut (in %) 0 10 20 30
Sky fraction (in %) 77.8 70.7 62.6 54.7
Effective sky fraction for noise (in %) 67.0 60.9 53.5 46.6
Effective sky fraction for signal (in %) 57.4 52.3 45.7 39.6


Frequency (GHz) 30 40 90 150 220 270
white noise level TT (uK-arcmin) 9.9 12.6 1.6 2.2 8.6 15.3
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) 14.0 17.9 2.3 3.1 12.1 21.6
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
Penalty (relative to f_sky scaling) 1.08 1.17 1.14 1.12 1.16 1.19

Results

Neff WAFTT v3 hc11.png

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