MAP: Broadband response MAP is intrinsically a broadband instrument. All characterization of the beams is done at the fixed frequencies listed below. In this directory we give the results for what we expect for the fullband response.

The passbands of the instrument are given in the passbands page. The data in there, along with the beam maps, are combined according to the memo MAP's Broadband Response. The result is the expected broadband optical response.

A plot of all the A-side + polarization beams is shown in A-side+port_meas.ps. This is almost complete and will be updated as new data become available. The predictions, with the measured passbands, are in A-side+45_pred.ps.

You will note from the plots that all A-side + polarizations (p45) do not point in the same direction! A note on this is forthcoming.

The entries with asterisks correspond to the correct bandpass being used with the correct OMT port. The complementary entries are for the opposite bandpass but the same OMT port.

K-Band

Each polarization direction has two maps associated with it. Thus, there are eight maps that characterize K band. The maps for two different polarizations for one feed are generally the same and the cross polar map is not used for science. So, to first order, there are just two feed patterns that are of concern.

There are two differential pairs and so there are two passbands, one for each polarization pair.

In the following we use just one of the patterns (K1A+45) and compare it to the two passbands. To complete the picture, the code needs to be rerun with the new passbands and the new feed data. The code for producing the following files is in kfullband.pro
The patterns are in bbk_beams_p45_meas.ps and the raw data are in bbk_thermalbeam_p45_meas.dat. If the passbands are approximated as flat but the measured beams are still used, one obtains bbk_beams_p45_flat.ps

Predicted beams (perfect reflectors) and flat passbands K_p45 (unpol)

fsyncffree ftherfdust
Max gain (dBi) 46.99 47.01 47.10 47.2
Omega (sq deg) 0.79 0.79 0.77 0.76
X FWHM (deg) 0.72 0.72 0.71 0.70
Y FWHM (deg) 0.88 0.88 0.87 0.86
The Poincare psi is -5.4 degrees, Poincare chi is 0.5 degrees, and polarization angle = 45.2 degrees. Convention is in Rholfs.

Predicted K1A beams (perfect reflectors) and measured passbands (co and cross)

fsyncffree ftherfdust
K11 passband, Max gain (dBi) 46.98 47.00 47.09 47.14
K11 passband, Omega (sq deg) 0.79 0.79 0.78 0.77
K11 passband, E FWHM (deg) 0.88 0.87 0.87 0.86
K11 passband, H FWHM (deg) 0.71 0.71 0.70 0.70
K12 passband, Max gain (dBi) 47.06 47.08 47.16 47.21
K12 passband, Omega (sq deg) 0.78 0.78 0.76 0.75
K12 passband, E FWHM (deg) 0.87 0.87 0.86 0.85
K12 passband, H FWHM (deg) 0.71 0.70 0.70 0.69

Measured K1A beams and measured passbands (co and cross)

fsyncffree ftherfdust
*K11 passband, Max gain (dBi) 46.22 46.25 46.34 46.40
*K11 passband, Omega (sq deg) 0.84 0.83 0.82 0.81
*K11 passband, E FWHM (deg) 0.92 0.92 0.91 0.90
*K11 passband, H FWHM (deg) 0.75 0.75 0.74 0.74
K12 passband, Max gain (dBi) 46.51 46.53 46.62 46.68
K12 passband, Omega (sq deg) 0.79 0.78 0.77 0.76
K12 passband, E FWHM (deg) 0.89 0.87 0.87 0.86
K12 passband, H FWHM (deg) 0.73 0.73 0.72 0.71
These data are shown in bbk_beams_p45_pred.ps.

Ka-Band

In the following we use one of the patterns (Ka1+45) and compare it to the two passbands. The code for producing the following files is in kafullband.pro
The patterns are in bbka_beams_p45_meas.ps (note from cross pol that E and H are backwards) and the raw data are in bbka_thermalbeam_p45_meas.dat.

Predicted beams (perfect reflectors) and flat passbands Ka_p45

fsyncffree ftherfdust
unpol Max gain (dBi) 49.89 49.91 49.98 50.03
unpol Omega (sq deg) 0.42 0.42 0.41 0.41
unpol X FWHM (deg) 0.52 0.52 0.52 0.51
unpol Y FWHM (deg) 0.65 0.65 0.65 0.64
copol Max gain (dBi) 49.89 49.91 49.98 50.03
copol Omega (sq deg) 0.42 0.42 0.41 0.41
copol E FWHM (deg) 0.52 0.52 0.51 0.51
copol H FWHM (deg) 0.65 0.65 0.64 0.64
The Poincare psi is 95.9 degrees, Poincare chi is 0.1 degrees, and polarization angle = 45.1 degrees. Convention is in Rholfs.

Predicted Ka1A beams (perfect reflectors) and measured passbands (co and cross)

fsyncffree ftherfdust
Ka11 passband, Max gain (dBi) 49.84 49.85 49.89 49.92
Ka11 passband, Omega (sq deg) 0.42 0.42 0.42 0.42
Ka11 passband, E FWHM (deg) 0.65 0.65 0.65 0.65
Ka11 passband, H FWHM (deg) 0.52 0.52 0.52 0.52
Ka12 passband, Max gain (dBi) 49.86 49.88 49.92 49.96
Ka12 passband, Omega (sq deg) 0.42 0.42 0.42 0.41
Ka12 passband, E FWHM (deg) 0.65 0.65 0.65 0.65
Ka12 passband, H FWHM (deg) 0.52 0.52 0.52 0.51
These data are shown in bbka_beams_p45_pred.ps.

Measured Ka1A beams and measured passbands (co and cross)

fsyncffree ftherfdust
Ka11 passband, Max gain (dBi) 49.65 49.67 49.72 49.76
Ka11 passband, Omega (sq deg) 0.45 0.45 0.44 0.44
Ka11 passband, E FWHM (deg) 0.68 0.68 0.68 0.68
Ka11 passband, H FWHM (deg) 0.55 0.55 0.54 0.54
*Ka12 passband, Max gain (dBi) 49.69 49.71 49.77 49.82
*Ka12 passband, Omega (sq deg) 0.44 0.44 0.44 0.43
*Ka12 passband, E FWHM (deg) 0.68 0.68 0.68 0.68
*Ka12 passband, H FWHM (deg) 0.55 0.55 0.54 0.54

Q-Band

In the following we use the patterns Q1A+45 and Q1B (which was mapped in the Q2A position) and compare it to the two passbands. The code for producing the following files is in q1fullband.pro and q2fullband.pro. The patterns are in bbq1_beams_p45_meas.ps (note from cross pol that E and H are backwards) and the raw data are in bbq1_thermalbeam_p45_meas.dat.

Predicted beams (perfect reflectors) and flat passbands Q1_p45

fsyncffree ftherfdust
unpol Max gain (dBi) 52.12 52.14 52.19 52.22
unpol Omega (sq deg) 0.25 0.25 0.25 0.24
unpol X FWHM (deg) 0.50 0.50 0.50 0.49
unpol Y FWHM (deg) 0.41 0.41 0.40 0.40
The Poincare psi is 0.1 degrees, Poincare chi is 0.3 degrees, and polarization angle = 44.9 degrees. Convention is in Rholfs.

Predicted Q1A beams (perfect reflectors) and measured passbands (co and cross)

fsyncffree ftherfdust
Q11 passband, Max gain (dBi) 52.05 52.06 52.10 52.12
Q11 passband, Omega (sq deg) 0.25 0.25 0.25 0.25
Q11 passband, E FWHM (deg) 0.41 0.41 0.41 0.40
Q11 passband, H FWHM (deg) 0.49 0.49 0.49 0.49
Q12 passband, Max gain (dBi) 52.06 52.07 52.10 52.12
Q12 passband, Omega (sq deg) 0.25 0.25 0.25 0.25
Q12 passband, E FWHM (deg) 0.41 0.41 0.41 0.40
Q12 passband, H FWHM (deg) 0.49 0.49 0.49 0.49

Measured Q1A beams and measured passbands (co and cross)

fsyncffree ftherfdust
*Q11 passband, Max gain (dBi) 51.67 51.69 51.77 51.83
*Q11 passband, Omega (sq deg) 0.26 0.26 0.25 0.25
*Q11 passband, E FWHM (deg) 0.44 0.44 0.44 0.43
*Q11 passband, H FWHM (deg) 0.49 0.48 0.48 0.48
Q12 passband, Max gain (dBi) 51.63 51.63 51.70 51.74
Q12 passband, Omega (sq deg) 0.26 0.26 0.26 0.26
Q12 passband, E FWHM (deg) 0.44 0.44 0.44 0.44
Q12 passband, H FWHM (deg) 0.49 0.49 0.49 0.48

Measured Q2A beams and measured passbands (co and cross)

fsyncffree ftherfdust
Q21 passband, Max gain (dBi) 51.78 51.80 51.86 51.91
Q21 passband, Omega (sq deg) 0.26 0.26 0.26 0.26
Q21 passband, E FWHM (deg) 0.44 0.44 0.44 0.43
Q21 passband, H FWHM (deg) 0.50 0.50 0.49 0.49
*Q22 passband, Max gain (dBi) 51.80 51.81 51.87 51.90
*Q22 passband, Omega (sq deg) 0.26 0.26 0.26 0.25
*Q22 passband, E FWHM (deg) 0.44 0.44 0.43 0.43
*Q22 passband, H FWHM (deg) 0.49 0.49 0.49 0.49

The patterns are in bbq2_beams_p45_meas.ps and the raw data are in bbq2_thermalbeam_p45_meas.dat.

V-Band

In the following we use the patterns V1A and V2A+ The code for producing the following files is in v1fullband.pro and v2fullband.pro. The patterns are in bbv1_beams_p45_meas.ps (note from cross pol that E and H are backwards) and the raw data are in bbv1_thermalbeam_p45_meas.dat. For V2, the patterns are in bbv2_beams_p45_meas.ps (note from cross pol that E and H are backwards) and the raw data are in bbv2_thermalbeam_p45_meas.dat.

Predicted beams (perfect reflectors) and flat passbands V2_p45

fsyncffree ftherfdust
unpol Max gain (dBi) 55.77 55.78 55.81 55.83
unpol Omega (sq deg) 0.109 0.109 0.108 0.107
unpol X FWHM (deg) 0.308 0.308 0.307 0.306
unpol Y FWHM (deg) 0.301 0.300 0.299 0.298
The Poincare psi is 41.1 degrees, Poincare chi is 0.1 degrees, and polarization angle = 45.1 degrees. Convention is in Rholfs.

Predicted V2A beams (perfect reflectors) and measured passbands (co and cross)

fsyncffree ftherfdust
V11 passband, Max gain (dBi) 55.74 55.75 55.78 55.80
V11 passband, Omega (sq deg) 0.110 0.109 0.109 0.108
V11 passband, E FWHM (deg) 0.281 0.281 0.280 0.279
V11 passband, H FWHM (deg) 0.337 0.337 0.336 0.336
V12 passband, Max gain (dBi) 55.69 55.70 55.73 55.75
V12 passband, Omega (sq deg) 0.111 0.111 0.110 0.109
V12 passband, E FWHM (deg) 0.283 0.283 0.282 0.281
V12 passband, H FWHM (deg) 0.339 0.339 0.338 0.337
These data are shown in bbv2_beams_p45_pred.ps.

Measured V1A beams and measured passbands (co and cross)

fsyncffree ftherfdust
V11 passband, Max gain (dBi) 55.27 55.29 55.37 55.44
V11 passband, Omega (sq deg) 0.126 0.126 0.124 0.123
V11 passband, E FWHM (deg) 0.303 0.302 0.299 0.296
V11 passband, H FWHM (deg) 0.346 0.345 0.342 0.340
*V12 passband, Max gain (dBi) 55.54 55.56 55.64 55.69
*V12 passband, Omega (sq deg) 0.121 0.121 0.119 0.119
*V12 passband, E FWHM (deg) 0.291 0.291 0.288 0.286
*V12 passband, H FWHM (deg) 0.336 0.335 0.332 0.330

Measured V2A beams and measured passbands (co and cross)

fsyncffree ftherfdust
*V21 passband, Max gain (dBi) 55.43 55.45 55.52 55.57
*V21 passband, Omega (sq deg) 0.115 0.114 0.112 0.117
*V21 passband, E FWHM (deg) 0.288 0.288 0.286 0.291
*V21 passband, H FWHM (deg) 0.326 0.326 0.323 0.329
V22 passband, Max gain (dBi) 55.30 55.38 55.44 55.44
V22 passband, Omega (sq deg) 0.116 0.115 0.114 0.114
V22 passband, E FWHM (deg) 0.290 0.289 0.288 0.288
V22 passband, H FWHM (deg) 0.328 0.327 0.325 0.325

W-Band

In the following we use the patterns corresponding to the A side of the focal plane. The code for producing the following files is in: w1fullband.pro and w2fullband.pro and w3fullband.pro and w4fullband.pro. The W1 patterns are in bbw1_beams_p45_meas.ps and the raw data are in bbw1_thermalbeam_p45_meas.dat.
The W2 patterns are in bbw2_beams_p45_meas.ps and the raw data are in bbw2_thermalbeam_p45_meas.dat.
The W3 patterns are in bbw3_beams_p45_meas.ps and the raw data are in bbw3_thermalbeam_p45_meas.dat.
The W4 patterns are in bbw4_beams_p45_meas.ps and the raw data are in bbw4_thermalbeam_p45_meas.dat.

Predicted beams (perfect reflectors) and flat passbands W2_p45 (bottom)

fsyncffree ftherfdust
unpol Max gain (dBi) 60.18 60.18 60.21 60.23
unpol Omega (sq deg) 0.039 0.039 0.039 0.039
unpol X FWHM (deg) 0.191 0.191 0.190 0.190
unpol Y FWHM (deg) 0.182 0.182 0.181 0.180
The Poincare psi is 2.2 degrees, Poincare chi is 0.0 degrees, and polarization angle = 45.0 degrees. Convention is in Rholfs.

Predicted beams (perfect reflectors) and measured passbands W2_p45

fsyncffree ftherfdust
W21 passband, Max gain (dBi) 60.10 60.10 60.12 60.13
W21 passband, Omega (sq deg) 0.040 0.040 0.040 0.040
W21 passband, E FWHM (deg) 0.185 0.185 0.185 0.184
W21 passband, H FWHM (deg) 0.189 0.189 0.189 0.189
W22 passband, Max gain (dBi) 60.12 60.13 60.14 60.16
W22 passband, Omega (sq deg) 0.040 0.040 0.040 0.040
W22 passband, E FWHM (deg) 0.185 0.184 0.184 0.184
W22 passband, H FWHM (deg) 0.189 0.189 0.189 0.188
These data are shown in bbw2_beams_p45_pred.ps.

Predicted beams (perfect reflectors) and flat passbands W4_p45 (top)

fsyncffree ftherfdust
unpol Max gain (dBi) 60.18 60.18 60.21 60.23
unpol Omega (sq deg) 0.039 0.039 0.039 0.039
unpol X FWHM (deg) 0.191 0.191 0.190 0.190
unpol Y FWHM (deg) 0.182 0.182 0.181 0.180
The Poincare psi is 2.2 degrees, Poincare chi is 0.0 degrees, and polarization angle = 45.0 degrees. Convention is in Rholfs.

Predicted beams (perfect reflectors) and measured passbands W4_p45

fsyncffree ftherfdust
W41 passband, Max gain (dBi) 59.83 59.84 59.96 59.87
W41 passband, Omega (sq deg) 0.043 0.043 0.043 0.043
W41 passband, E FWHM (deg) 0.200 0.200 0.199 0.199
W41 passband, H FWHM (deg) 0.187 0.187 0.186 0.186
W42 passband, Max gain (dBi) 59.79 59.80 59.82 59.84
W42 passband, Omega (sq deg) 0.043 0.043 0.043 0.043
W42 passband, E FWHM (deg) 0.200 0.200 0.200 0.200
W42 passband, H FWHM (deg) 0.188 0.188 0.188 0.187
These data are shown in bbw4_beams_p45_pred.ps.

Predicted beams (perfect reflectors) and flat passbands W4_p45

fsyncffree ftherfdust
unpol Max gain (dBi) 59.85 59.86 59.88 59.90
unpol Omega (sq deg) 0.043 0.043 0.042 0.042
unpol X FWHM (deg) 0.190 0.190 0.189 0.189
unpol Y FWHM (deg) 0.198 0.197 0.197 0.196
The Poincare psi is 2.2 degrees, Poincare chi is 0.0 degrees, and polarization angle = 45.0 degrees. Convention is in Rholfs.

Measured W1A beams and measured passbands (co and cross)

fsyncffree ftherfdust
*W11 passband, Max gain (dBi) 58.43 58.44 58.46 58.47
*W11 passband, Omega (sq deg) 0.053 0.053 0.053 0.052
*W11 passband, E FWHM (deg) 0.200 0.200 0.199 0.199
*W11 passband, H FWHM (deg) 0.212 0.211 0.211 0.211
W12 passband, Max gain (dBi) 58.39 58.39 58.41 58.42
W12 passband, Omega (sq deg) 0.053 0.053 0.053 0.053
W12 passband, E FWHM (deg) 0.201 0.201 0.201 0.200
W12 passband, H FWHM (deg) 0.212 0.212 0.212 0.212

Measured W2A beams and measured passbands (co and cross)

fsyncffree ftherfdust
W21 passband, Max gain (dBi) 59.03 59.04 59.08 59.11
W21 passband, Omega (sq deg) 0.046 0.046 0.046 0.045
W21 passband, E FWHM (deg) 0.194 0.194 0.193 0.193
W21 passband, H FWHM (deg) 0.195 0.195 0.194 0.194
*W22 passband, Max gain (dBi) 59.10 59.11 59.15 59.18
*W22 passband, Omega (sq deg) 0.046 0.046 0.045 0.045
*W22 passband, E FWHM (deg) 0.193 0.193 0.193 0.192
*W22 passband, H FWHM (deg) 0.195 0.194 0.194 0.193
The reason for the difference between this and the above predictions is the rms deviation in the reflector.

Measured W3A beams and measured passbands (co and cross)

fsyncffree ftherfdust
*W31 passband, Max gain (dBi) 59.40 59.41 59.44 59.45
*W31 passband, Omega (sq deg) 0.043 0.043 0.043 0.043
*W31 passband, E FWHM (deg) 0.193 0.193 0.193 0.193
*W31 passband, H FWHM (deg) 0.186 0.186 0.186 0.186
W32 passband, Max gain (dBi) 59.46 59.46 59.49 59.50
W32 passband, Omega (sq deg) 0.043 0.042 0.042 0.042
W32 passband, E FWHM (deg) 0.193 0.193 0.193 0.192
W32 passband, H FWHM (deg) 0.186 0.185 0.185 0.185

Measured W3B beams and measured passbands (co and cross)

fsyncffree ftherfdust
W31 passband, Max gain (dBi) 59.01 59.01 59.04 59.07
W31 passband, Omega (sq deg) 0.046 0.046 0.046 0.046
W31 passband, E FWHM (deg) 0.197 0.197 0.196 0.196
W31 passband, H FWHM (deg) 0.200 0.200 0.199 0.199
W32 passband, Max gain (dBi) 59.04 59.05 59.08 59.11
W32 passband, Omega (sq deg) 0.046 0.046 0.046 0.046
W32 passband, E FWHM (deg) 0.196 0.196 0.196 0.195
W32 passband, H FWHM (deg) 0.199 0.199 0.198 0.198

Measured W4A beams and measured passbands (co and cross)

fsyncffree ftherfdust
W41 passband, Max gain (dBi) 58.69 58.70 58.72 58.73
W41 passband, Omega (sq deg) 0.050 0.050 0.050 0.050
W41 passband, E FWHM (deg) 0.205 0.205 0.205 0.205
W41 passband, H FWHM (deg) 0.197 0.197 0.196 0.196
*W42 passband, Max gain (dBi) 58.68 58.68 58.69 58.70
*W42 passband, Omega (sq deg) 0.050 0.050 0.050 0.050
*W42 passband, E FWHM (deg) 0.204 0.204 0.204 0.204
*W42 passband, H FWHM (deg) 0.197 0.197 0.197 0.197

Mapping Frequencies (GHz)

K Ka Q V W
18.5 ... ... ... ...
19.0 ... ... ... ...
19.5 27.5 34.0 51.5 80.0
20.0 28.0 35.0 53.0 82.0
20.5 29.0 36.2 54.8 84.7
21.1 30.0 37.4 56.5 87.3
21.7 31.0 38.6 58.3 90.0
22.2 32.0 39.8 60.2 92.7
22.8 33.0 41.1 61.9 95.3
23.3 34.0 42.3 63.6 98.0
23.9 35.0 43.5 65.4 100.6
24.4 36.0 44.7 67.2 103.3
25.0 37.0 46.0 69.0 106.0
25.5 37.5 47.0 70.5 108.0
K band has two extra frequencies because the bandpass is wider than originally expected.
Log:
Original L. Page Dec 17, 1998. page@pupgg.princeton.edu
Added memo, LP Jan 18, 1999
Added K-band, LP Jan 29, 1999
Finished W, V, K, Ka bands LP Feb 13, 1999
Updated the fullband plots. Compared to model. LP Feb 14, 1999
Updated K and W band plots. Added asterisks. LP Mar 3, 1999
Last modified: Wed Feb 6 23:39:24 EST 2002