3.6cm secondary focus receiver (7.8-8.9 GHz)
This is a 4-channel system mainly for VLBI and continuum observations.

Frequency [GHz] Channel Polarisation Tcal [K] Tsys [K] Sensitivity [K/Jy] SEFD [Jy] Aperture Eff. [%] TMB/S [K/Jy] Main Beam Eff. [%] FWHM [arcsec] Last update
8.410 I   (BB) RCP 2.5 22 1.35 18 45 2.6 49 81.7 Jul 2008
8.410 J   (BB) LCP 2.5 22 1.35 18 45 2.6 49 81.7 Jul 2008
8.550 I   (BB) RCP 2.5 23 1.35 18 46 2.6 50 80.6 Jul 2008
8.550 J   (BB) LCP 2.5 25 1.35 19 46 2.6 50 80.6 Jul 2008

normalized Gain curve     (G = A0 + A1·Elv + A2·Elv2) Observed in
A0 = 0.97453      A1 = 1.192E-3      A2 = -1.389E-5 Dec 2001
A0 = 0.99500      A1 = 4.3434e-04      A2 = -1.0562e-05 Feb 2007

Comments:

  • All values are valid for the new receiver which was installed in September 2001. If you need data for the old one, please contact akraus_at_mpifr-bonn.mpg.de.
  • Note that (against our usual designation) Channel A is RCP and B LCP!
  • The new gain curve (Feb 2007) was corrected for opacity.
  • If no other information about the opacity is available a typical zenith tau value of about 0.018 should do a good job.