7mm secondary focus receiver (41.6-44.4 GHz)
This is a 2-channel system for VLBI observations. The whole receiver was reconditioned in late 2006.

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
42.0 A LCP 13.8 108
 0.53 196
 19 1.5 36 19.8 Mar 2009
42.0 B RCP 12.2 131
 0.53 248
 19 1.5 35 19.8 Mar 2009

normalized, opacity corrected gain curve     (G = A0 + A1·Elv + A2·Elv2) Observed in
A0 = 0.8806      A1 = 5.8673E-3      A2 = -7.1243E-05 Dec 2007
A0 = 0.8800      A1 = 6.9970E-3      A2 = -1.0210E-04 Mar 2009

Comments:

  • For informations about the old parameters please contact Uwe Bach (ubach_at_mpifr.de).
  • Opacity correction was done with a zenith opacity of 0.08. Typical zenith opacities under good weather conditions are around 0.07 to 0.1 at 42 GHz