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GAIN CURVES

Gain characteristics were measured in 2000 or 2001 by B.J. Butler and R.A. Perley for most VLA antennas. Power gains do not vary significantly with zenith angle at frequencies of 5.0 GHz and lower, but do vary with zenith angle at higher frequencies. Gains at 8.5, 15, 23, and 43 GHz were normalized; corrected for zenith opacities of 0.010, 0.015, 0.175, and 0.075, respectively; and fit to polynomials of second order. Polynomial fits to these gain curves are plotted and tabulated in the next four figure-table pairs. The third column in each table is in the form expected by program ANTAB in the NRAO AIPS package and applies to single-antenna VLBI (but not to phased-array VLBI). In addition to the polynomial fits, the third column carries the nominal gains based on nominal antenna efficiencies in the ``VLA Observational Status Summary''.

Figure 2: Gain curves for VLA antennas 1-8.
\begin{figure}\vspace{7in} \special{psfile=figAa.ps angle=0 hscale=65 vscale=65 hoffset=-15 voffset=0} \end{figure}


Table 3: Gain Information for VLA Antennas 1-8
Freq.
Ant. [GHz] Single-Antenna Gain Information for Program ANTAB
1 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.999E+00,0.139E-03,-.336E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.102E+01,-.198E-02,-.540E-05
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.938E+00,0.419E-02,-.731E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.699E+00,0.168E-01,-.261E-03
2 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.100E+01,-.120E-03,-.981E-06
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.993E+00,0.774E-03,-.223E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.102E+01,-.152E-02,-.264E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.983E+00,0.257E-02,-.924E-04
3 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.970E+00,0.602E-03,-.283E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.896E+00,0.322E-02,-.250E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.809E+00,0.774E-02,-.787E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.807E+00,0.941E-02,-.116E-03
4 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.972E+00,0.137E-02,-.165E-04
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.827E+00,0.287E-02,-.119E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.776E+00,0.606E-02,-.409E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.000E+00,0.000E+00
5 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.985E+00,0.541E-03,-.493E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.910E+00,0.309E-02,-.265E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.905E+00,0.499E-02,-.658E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.103E+01,-.253E-02,-.138E-04
6 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.992E+00,0.448E-03,-.638E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.952E+00,0.232E-02,-.283E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.908E+00,0.504E-02,-.696E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.807E+00,0.945E-02,-.117E-03
7 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.985E+00,-.134E-03,0.404E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.878E+00,0.391E-02,-.313E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.789E+00,0.778E-02,-.722E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.000E+00,0.000E+00
8 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.100E+01,-.121E-03,-.220E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.916E+00,0.308E-02,-.283E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.840E+00,0.723E-02,-.819E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.702E+00,0.150E-01,-.194E-03

Figure 3: Gain curves for VLA antennas 9-16.
\begin{figure}\vspace{7in} \special{psfile=figAb.ps angle=0 hscale=65 vscale=65 hoffset=-15 voffset=0} \end{figure}


Table 4: Gain Information for VLA Antennas 9-16
Freq.
Ant. [GHz] Single-Antenna Gain Information for Program ANTAB
9 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.985E+00,0.638E-03,-.679E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.967E+00,0.179E-02,-.247E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.918E+00,0.470E-02,-.687E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.000E+00,0.000E+00
10 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.966E+00,0.745E-03,-.399E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.888E+00,0.378E-02,-.320E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.841E+00,0.692E-02,-.753E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.761E+00,0.103E-01,-.113E-03
11 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.100E+01,-.124E-05,-.308E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.944E+00,0.269E-02,-.326E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.993E+00,0.128E-02,-.497E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.932E+00,0.516E-02,-.106E-03
12 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.980E+00,0.728E-03,-.648E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.851E+00,0.441E-02,-.326E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.697E+00,0.111E-01,-.103E-03
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.697E+00,0.138E-01,-.159E-03
13 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.970E+00,0.729E-03,-.441E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.962E+00,0.193E-02,-.242E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.886E+00,0.564E-02,-.701E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.806E+00,0.995E-02,-.130E-03
14 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.983E+00,0.368E-03,-.188E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.901E+00,0.355E-02,-.320E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.781E+00,0.874E-02,-.875E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.818E+00,0.973E-02,-.133E-03
15 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.102E+01,-.196E-02,0.157E-04
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.980E+00,0.123E-02,-.189E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.902E+00,0.639E-02,-.110E-03
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.000E+00,0.000E+00
16 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.985E+00,0.408E-03,-.284E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.863E+00,0.437E-02,-.350E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.746E+00,0.976E-02,-.944E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.913E+00,0.230E-02,-.153E-04

Figure 4: Gain curves for VLA antennas 17-24.
\begin{figure}\vspace{7in} \special{psfile=figAc.ps angle=0 hscale=65 vscale=65 hoffset=-15 voffset=0} \end{figure}


Table 5: Gain Information for VLA Antennas 17-24
Freq.
Ant. [GHz] Single-Antenna Gain Information for Program ANTAB
17 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.983E+00,0.623E-03,-.565E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.908E+00,0.367E-02,-.366E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.858E+00,0.604E-02,-.646E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.764E+00,0.124E-01,-.166E-03
18 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.100E+01,-.436E-03,-.150E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.986E+00,0.140E-02,-.354E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.101E+01,-.361E-03,-.384E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.887E+00,0.760E-02,-.140E-03
19 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.975E+00,0.677E-03,-.462E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.873E+00,0.464E-02,-.427E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.912E+00,0.501E-02,-.725E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.749E+00,0.118E-01,-.139E-03
20 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.979E+00,0.777E-03,-.715E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.873E+00,0.525E-02,-.543E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.897E+00,0.561E-02,-.773E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.000E+00,0.000E+00
21 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.999E+00,0.810E-04,-.262E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.993E+00,0.726E-03,-.192E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.101E+01,-.670E-03,-.318E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.100E+01,0.700E-03,-.571E-04
22 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.984E+00,0.650E-03,-.653E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.897E+00,0.362E-02,-.321E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.823E+00,0.778E-02,-.856E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.812E+00,0.951E-02,-.122E-03
23 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.991E+00,0.522E-03,-.791E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.954E+00,0.167E-02,-.151E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.957E+00,0.302E-02,-.552E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.932E+00,0.433E-02,-.710E-04
24 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.998E+00,0.138E-03,-.198E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.958E+00,0.207E-02,-.254E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.100E+01,-.133E-03,-.200E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.836E+00,0.100E-01,-.165E-03

Figure 5: Gain curves for VLA antennas 25-28.


Table 6: Gain Information for VLA Antennas 25-28
Freq.
Ant. [GHz] Single-Antenna Gain Information for Program ANTAB
25 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.973E+00,0.109E-02,-.109E-04
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.869E+00,0.409E-02,-.321E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.856E+00,0.584E-02,-.594E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.750E+00,0.116E-01,-.137E-03
26 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.980E+00,0.946E-03,-.113E-04
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.971E+00,0.246E-02,-.537E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.100E+01,0.866E-03,-.498E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.701E+00,0.137E-01,-.159E-03
27 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.995E+00,0.305E-03,-.470E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.918E+00,0.329E-02,-.331E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.803E+00,0.873E-02,-.970E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.717E+00,0.121E-01,-.131E-03
28 8.5 GAIN Y ALTAZ DPFU=0.112,0.112 POLY=0.985E+00,0.595E-03,-.590E-05
15 GAIN Y ALTAZ DPFU=0.103,0.103 POLY=0.967E+00,0.163E-02,-.204E-04
23 GAIN Y ALTAZ DPFU=0.071,0.071 POLY=0.920E+00,0.512E-02,-.848E-04
43 GAIN Y ALTAZ DPFU=0.062,0.062 POLY=0.786E+00,0.104E-01,-.128E-03

next up previous contents
Next: SCHEDULING HINTS Up: VERY LONG BASELINE INTERFEROMETRY Previous: CALIBRATION INFORMATION   Contents
Stephan Witz 2002-04-10