# VLBA IF # IF 1 IF2 # Freq Side Tcal Tcal #[GHz] band [K] [K] 18.2 LSB 4.22 3.38 18.5 LSB 3.41 3.03 19.0 LSB 3.25 3.06 19.5 LSB 3.35 3.02 20.0 LSB 3.11 2.78 20.5 LSB 2.91 2.69 21.0 LSB 2.82 2.43 21.5 LSB 2.48 2.09 22.0 LSB 2.35 1.90 22.2 LSB 2.33 1.72 22.5 LSB 2.26 1.72 21.5 USB 2.48 2.02 22.0 USB 2.33 1.90 22.2 USB 2.34 1.73 22.5 USB 2.29 1.69 23.0 USB 2.29 1.68 23.5 USB 2.33 1.61 23.7 USB 2.28 1.58 24.0 USB 2.06 1.52 24.5 USB 2.03 1.53 25.0 USB 2.05 1.52 25.5 USB 1.94 1.52 26.0 USB 1.96 1.49 26.5 USB 1.88 1.56