       Cassegrain radio telescope parameters
 Circular aperture diameter, D                           80.000 m
 Dish size ('vertical' diameter), D2                     98.751 m
 Focal length of primary mirror, f                       38.000 m
 Focal ratio of primary mirror, f/D                       0.200  
 Focal ratio of parent paraboloid, f/D_parent             0.200  
 Telescope F-number (or F/#): F_eff/D                     3.611  
 Deepest dish point is off mid point by                  24.925 m
 Dish depth, g_max                                        8.528 m
 Dish subtended angle - vertical plane                   80.351 deg
 Dish subtended angle - laterally                        71.544 deg
 Dish separation from axis, x1                           15.000 m
 Axis to outermost dish point, x2                        95.000 m
 Height of secondary focus above paraboloid vertex, h    -3.000 m
 Axis  subreflector outer edge distance                 15.000 m
 Prime focus  subreflector outer edge distance          15.375 m
 Prime focus to hyperboloid vertex, f1=c-a                4.767 m
 Secondary focus to hyperboloid vertex, f2=c+a           36.233 m
 Secondary interfocal length, f1+f2=2c                   41.000 m
 Eccentricity of the hyperboloid, e=c/a                   1.303  
 Ray path difference to the foci, (f-h)a/c               31.467 m
 Cassegrain telescope magnification, M=f2/f1              7.601  
 Effective focal length, F=M*f                          288.853 m
 Aperture center angle as seen from sec. focus           10.877 deg
 Subreflector physical center angle                      10.826 deg
 Subreflector subtended angle                            15.702 deg
 Subreflector size in vertical plane                     15.346 m
 Subreflector lateral size at center                     11.288 m
 Subreflector depth at center                             0.988 m
 Subreflector pivot coordinates, x,y,z    7.410   0.000  -2.438 m
 Subreflector tilt towards +ve X and Y           -0.005   1.031 deg
 Subreflector offsets in x, y and z      -0.033  -0.005   0.010 m
 Feed offsets in x, y and z               0.001   1.500   0.340 m
 Feed pattern nominal angles wrt YZ,XZ planes    10.910  -2.149 deg
  and respective offsets                         -0.100   0.080 deg
 Observing frequncy [GHz] and wavelength          4.997   6.000 cm
 Assumed z-coordinate for aperture plane                -27.309 m
 Number of rays traced                                     1313
 Number of pattern bins in u.v dimensions                51.037 
 Span of u coordinate [spacial cycles]                    5.600 
 Span of v coordinate                                     4.400 
 Beam offset, vertically (downward +ve)                   0.003 deg
 Beam offset, laterally (leftward +ve)                   -0.148 deg
 HPBW, beamwidth in vertical plane                        3.007 '
   same in orthogonal plane (laterally)                   2.993 '
 Free space illumination taper or just asymmetry          0.226 dB
 Feed illumination taper at the edge                     12.000 dB
 Ray tracing aberration loss                              2.594 %
 Ray tracing spillover loss                               0.095 %
 Loss due to decentered illumination                      3.538 %
 Pattern distortions range (min and max):       -0.127    1.376 %
 
        Some characteristics valid for symmetric reflector antenna
  (classical optics approx.; parabolic on pedestal or Gaussian illumin.)

 Half power beam width (Baars 2003) ..............   0.0500          [deg]
 First side lobe power level due to taper (Baars)    0.5351            [%]
 Gain loss due to tapered illumination ...........  10.6659            [%]
 Gain loss due to diffraction at subrefl. (Lamb) .   2.1510            [%]
 Astigmatic gain loss due to lateral feed offset .   0.0146            [%]
 Coma gain loss due to lateral feed offset .......   0.0097            [%]
 Aberration (astigmatism & coma) gain loss .......   0.0243            [%]
 Petzval surface radius (inverse field curvature)    4.2354            [m]
 Beam dev. due to primary translation (Baars) ....  -1.3024*Xoff/m   [deg]
 Beam dev. due to primary rotation ...............   1.8638*tilt/deg [deg]
 Beam dev. due to secondary translation ..........  -1.1046*Xoff/m   [deg]
 Beam dev. due to secondary rotation about vertex    0.2334*tilt/deg [deg]
 Beam dev. due to secondary rotation about focus .   0.1415*tilt/deg [deg]
 Beam dev. due to secondary rotation about "z_piv"   0.1886*tilt/deg [deg]
 Beam dev. due to feed translation in sec. focus .  -0.1978*Xoff/m   [deg]
 Feed offset per beam width, prime focus (Baars) .  -0.0384*NoOfBeams  [m]
 Feed offset per beam width, secondary focus .....  -0.2530*NoOfBeams  [m]
 
 Ray data - sample of amplitude distribution on aperture
 No of rays: 1313.  Rays per diameter: 41.  Step: 1.9512195 m
    (x [m],    y [m],  Ampl,  Phase [rad])
 Section along x-axis
  -39.0721   -0.1154  0.30268  2.11052
  -37.1189   -0.1288  0.37050  2.22465
  -35.1656   -0.1437  0.43475  2.33261
  -33.2122   -0.1601  0.49544  2.43421
  -31.2589   -0.1779  0.55257  2.52933
  -29.3054   -0.1973  0.60612  2.61793
  -27.3519   -0.2181  0.65610  2.70001
  -25.3983   -0.2403  0.70252  2.77563
  -23.4447   -0.2640  0.74536  2.84489
  -21.4910   -0.2890  0.78464  2.90795
  -19.5372   -0.3154  0.82035  2.96500
  -17.5834   -0.3432  0.85250  3.01626
  -15.6295   -0.3723  0.88108  3.06197
  -13.6755   -0.4027  0.90610  3.10241
  -11.7214   -0.4345  0.92757  3.13787
   -9.7673   -0.4674  0.94548  3.16865
   -7.8131   -0.5016  0.95985  3.19506
   -5.8588   -0.5370  0.97067  3.21740
   -3.9045   -0.5736  0.97795  3.23600
   -1.9501   -0.6113  0.98170  3.25117
    0.0044   -0.6502  0.98192  3.26322
    1.9589   -0.6901  0.97862  3.27245
    3.9134   -0.7311  0.97181  3.27914
    5.8680   -0.7731  0.96150  3.28360
    7.8227   -0.8160  0.94769  3.28607
    9.7774   -0.8599  0.93038  3.28684
   11.7321   -0.9048  0.90960  3.28614
   13.6868   -0.9504  0.88535  3.28420
   15.6416   -0.9969  0.85763  3.28125
   17.5964   -1.0442  0.82647  3.27750
   19.5512   -1.0923  0.79186  3.27314
   21.5060   -1.1410  0.75382  3.26835
   23.4608   -1.1904  0.71237  3.26330
   25.4156   -1.2404  0.66751  3.25814
   27.3704   -1.2910  0.61926  3.25302
   29.3252   -1.3421  0.56763  3.24808
   31.2800   -1.3937  0.51262  3.24344
   33.2347   -1.4458  0.45427  3.23920
   35.1895   -1.4982  0.39257  3.23547
   37.1442   -1.5509  0.32755  3.23234
   39.0988   -1.6039  0.25921  3.22990
 Central section perpendicular to x-axis
   -0.5223  -39.6436  0.26627  0.81123
   -0.4959  -37.6993  0.33507  0.31820
   -0.4695  -35.7543  0.40045  6.10801
   -0.4431  -33.8086  0.46238  5.61412
   -0.4167  -31.8624  0.52085  5.11955
   -0.3903  -29.9155  0.57587  4.62415
   -0.3639  -27.9681  0.62741  4.12773
   -0.3375  -26.0201  0.67548  3.63012
   -0.3112  -24.0715  0.72007  3.13115
   -0.2848  -22.1224  0.76118  2.63064
   -0.2585  -20.1728  0.79879  2.12842
   -0.2322  -18.2227  0.83290  1.62432
   -0.2058  -16.2721  0.86351  1.11818
   -0.1795  -14.3210  0.89062  0.60984
   -0.1532  -12.3694  0.91421  0.09918
   -0.1269  -10.4174  0.93429  5.86924
   -0.1007   -8.4649  0.95086  5.35353
   -0.0744   -6.5119  0.96390  4.83515
   -0.0481   -4.5585  0.97343  4.31401
   -0.0219   -2.6046  0.97944  3.79004
    0.0044   -0.6502  0.98192  3.26322
    0.0306    1.3046  0.98088  2.73351
    0.0569    3.2599  0.97633  2.20092
    0.0831    5.2157  0.96824  1.66546
    0.1093    7.1720  0.95664  1.12718
    0.1356    9.1287  0.94152  0.58615
    0.1618   11.0859  0.92289  0.04244
    0.1880   13.0437  0.90074  5.77936
    0.2143   15.0019  0.87508  5.23064
    0.2405   16.9607  0.84591  4.67963
    0.2667   18.9200  0.81324  4.12647
    0.2930   20.8799  0.77707  3.57135
    0.3192   22.8403  0.73741  3.01444
    0.3455   24.8013  0.69426  2.45594
    0.3718   26.7629  0.64762  1.89607
    0.3980   28.7252  0.59751  1.33504
    0.4243   30.6881  0.54393  0.77306
    0.4506   32.6516  0.48689  0.21036
    0.4769   34.6158  0.42640  5.93036
    0.5032   36.5807  0.36245  5.36690
    0.5296   38.5463  0.29507  4.80341

  Power spectra
 Central section (u,v0,Power,PowerNoPhase,RefPattern); Nu =   51
    -2.7257   -3.4424       486.8       564.5       543.7
    -2.6137   -3.4424       423.2       429.8       409.3
    -2.5016   -3.4424       260.6       201.3       187.1
    -2.3897   -3.4424        94.5        20.3        14.5
    -2.2776   -3.4424        69.1        72.5        74.7
    -2.1656   -3.4424       316.3       499.3       505.6
    -2.0537   -3.4424       876.3      1301.7      1304.4
    -1.9416   -3.4424      1638.4      2271.6      2262.6
    -1.8297   -3.4424      2347.8      3015.3      2985.3
    -1.7176   -3.4424      2711.4      3085.8      3033.2
    -1.6056   -3.4424      2612.0      2251.1      2185.3
    -1.4936   -3.4424      2395.3       831.3       775.3
    -1.3816   -3.4424      3150.0        14.0         8.7
    -1.2696   -3.4424      6878.5      2034.2      2137.9
    -1.1576   -3.4424     16449.5     10099.2     10384.0
    -1.0457   -3.4424     35265.5     27995.5     28539.2
    -0.9336   -3.4424     66645.7     59380.5     60264.7
    -0.8216   -3.4424    113010.0    106916.0    108187.9
    -0.7096   -3.4424    175030.4    171271.0    172994.2
    -0.5976   -3.4424    250960.4    250557.1    252732.3
    -0.4856   -3.4424    336349.4    339921.8    342546.3
    -0.3736   -3.4424    424282.5    431978.0    435012.0
    -0.2616   -3.4424    506174.4    517615.3    520992.7
    -0.1496   -3.4424    573013.5    587391.1    591020.6
    -0.0376   -3.4424    616828.8    633035.3    636824.9
     0.0744   -3.4424    632082.6    648917.9    652759.4
     0.1864   -3.4424    616686.3    633035.3    636824.9
     0.2984   -3.4424    572410.5    587391.1    591020.6
     0.4104   -3.4424    504591.3    517615.3    520992.7
     0.5224   -3.4424    421193.9    431978.0    435012.0
     0.6344   -3.4424    331436.3    339921.8    342546.3
     0.7464   -3.4424    244269.6    250557.1    252732.3
     0.8583   -3.4424    167030.7    171271.0    172994.2
     0.9703   -3.4424    104524.3    106916.0    108187.9
     1.0824   -3.4424     58679.5     59380.5     60264.7
     1.1944   -3.4424     28780.0     27995.5     28539.2
     1.3063   -3.4424     12145.4     10099.2     10384.0
     1.4184   -3.4424      5049.8      2034.2      2137.9
     1.5303   -3.4424      3644.5        14.0         8.7
     1.6423   -3.4424      4686.2       831.3       775.3
     1.7544   -3.4424      5952.4      2251.1      2185.3
     1.8663   -3.4424      6323.3      3085.8      3033.2
     1.9784   -3.4424      5592.8      3015.3      2985.3
     2.0903   -3.4424      4126.5      2271.6      2262.6
     2.2024   -3.4424      2493.9      1301.7      1304.4
     2.3144   -3.4424      1180.4       499.3       505.6
     2.4263   -3.4424       431.4        72.5        74.7
     2.5384   -3.4424       234.0        20.3        14.5
     2.6504   -3.4424       396.6       201.3       187.1
     2.7624   -3.4424       669.5       429.8       409.3
     2.8744   -3.4424       851.3       564.5       543.7

 Central section (u0,v,Power,PowerNoPhase,RefPattern); Nv =   37
     0.0744   -5.6424       922.1       804.7       752.1
     0.0744   -5.5201      2068.2      1823.0      1733.5
     0.0744   -5.3979      3249.1      2821.1      2711.7
     0.0744   -5.2757      3866.7      3222.9      3111.8
     0.0744   -5.1535      3440.4      2580.2      2501.1
     0.0744   -5.0312      2091.2      1071.4      1037.2
     0.0744   -4.9090      1049.1         2.5         0.3
     0.0744   -4.7868      2977.6      2127.3      2122.3
     0.0744   -4.6646     11906.8     11564.1     11530.2
     0.0744   -4.5424     32647.9     33207.8     33145.5
     0.0744   -4.4201     69713.7     71609.4     71530.8
     0.0744   -4.2979    125946.4    129634.0    129709.9
     0.0744   -4.1757    201206.1    207065.6    207592.7
     0.0744   -4.0535    291526.8    299801.5    300754.7
     0.0744   -3.9312    389079.5    399866.0    401499.8
     0.0744   -3.8090    483093.6    496203.8    498717.4
     0.0744   -3.6868    561626.6    576678.6    579864.6
     0.0744   -3.5646    613816.3    630161.3    633831.7
     0.0744   -3.4424    632082.6    648917.9    652759.4
     0.0744   -3.3201    613723.6    630161.3    633831.7
     0.0744   -3.1979    561492.4    576678.6    579864.6
     0.0744   -3.0757    483002.5    496203.8    498717.4
     0.0744   -2.9535    389120.1    399866.0    401499.8
     0.0744   -2.8312    291760.9    299801.5    300754.7
     0.0744   -2.7090    201646.5    207065.6    207592.7
     0.0744   -2.5868    126550.8    129634.0    129709.9
     0.0744   -2.4646     70395.9     71609.4     71530.8
     0.0744   -2.3424     33302.3     33207.8     33145.5
     0.0744   -2.2201     12437.2     11564.1     11530.2
     0.0744   -2.0979      3322.3      2127.3      2122.3
     0.0744   -1.9757      1192.7         2.5         0.3
     0.0744   -1.8535      2062.8      1071.4      1037.2
     0.0744   -1.7312      3299.2      2580.2      2501.1
     0.0744   -1.6090      3681.6      3222.9      3111.8
     0.0744   -1.4868      3078.7      2821.1      2711.7
     0.0744   -1.3646      1948.3      1823.0      1733.5
     0.0744   -1.2424       862.2       804.7       752.1

 Central section (u,v0,Difference); Nu =   51
       -2.73      -3.44     -39.62
       -2.61      -3.44      26.86
       -2.50      -3.44      79.44
       -2.39      -3.44      80.50
       -2.28      -3.44      -3.18
       -2.17      -3.44    -173.28
       -2.05      -3.44    -386.79
       -1.94      -3.44    -552.49
       -1.83      -3.44    -542.96
       -1.72      -3.44    -225.77
       -1.61      -3.44     495.94
       -1.49      -3.44    1644.54
       -1.38      -3.44    3141.60
       -1.27      -3.44    4808.30
       -1.16      -3.44    6394.39
       -1.05      -3.44    7630.36
       -0.93      -3.44    8289.98
       -0.82      -3.44    8249.16
       -0.71      -3.44    7516.02
       -0.60      -3.44    6233.62
       -0.49      -3.44    4653.63
       -0.37      -3.44    3049.98
       -0.26      -3.44    1684.77
       -0.15      -3.44     714.11
       -0.04      -3.44     175.94
        0.07      -3.44       0.00
        0.19      -3.44      33.51
        0.30      -3.44     111.11
        0.41      -3.44     101.64
        0.52      -3.44     -38.58
        0.63      -3.44    -259.47
        0.75      -3.44    -457.11
        0.86      -3.44    -483.73
        0.97      -3.44    -236.55
        1.08      -3.44     323.74
        1.19      -3.44    1144.81
        1.31      -3.44    2090.25
        1.42      -3.44    2979.59
        1.53      -3.44    3636.16
        1.64      -3.44    3935.49
        1.75      -3.44    3836.33
        1.87      -3.44    3386.20
        1.98      -3.44    2702.08
        2.09      -3.44    1935.55
        2.20      -3.44    1230.88
        2.31      -3.44     690.77
        2.43      -3.44     359.04
        2.54      -3.44     219.98
        2.65      -3.44     215.47
        2.76      -3.44     273.21
        2.87      -3.44     324.84

 Central section (u0,v,Difference); Nv =   37
        0.07      -5.64     193.77
        0.07      -5.52     389.61
        0.07      -5.40     623.25
        0.07      -5.28     853.46
        0.07      -5.15    1018.57
        0.07      -5.03    1086.87
        0.07      -4.91    1048.88
        0.07      -4.79     922.52
        0.07      -4.66     741.81
        0.07      -4.54     552.36
        0.07      -4.42     448.75
        0.07      -4.30     345.17
        0.07      -4.18     189.16
        0.07      -4.05     298.83
        0.07      -3.93     297.73
        0.07      -3.81     173.61
        0.07      -3.69     129.85
        0.07      -3.56      61.88
        0.07      -3.44       0.00
        0.07      -3.32     -30.74
        0.07      -3.20      -4.28
        0.07      -3.08      82.52
        0.07      -2.95     338.32
        0.07      -2.83     532.92
        0.07      -2.71     629.57
        0.07      -2.59     949.57
        0.07      -2.46    1130.93
        0.07      -2.34    1206.67
        0.07      -2.22    1272.27
        0.07      -2.10    1267.23
        0.07      -1.98    1192.47
        0.07      -1.85    1058.45
        0.07      -1.73     877.40
        0.07      -1.61     668.35
        0.07      -1.49     452.90
        0.07      -1.36     269.78
        0.07      -1.24     133.93
