The new 85-95 GHz receiver for the 100m radio telescope

First light on April 5-9, 2001

Overview (click on images to enlarge):

         
             
           

Some Details:
A new dual beam dual polarisation (left + right hand circular) HEMT receiver was built
(2 GHz bandwidth). The main application will be global VLBI observations at 86 GHz (3.5 mm).
Below are some impressions from a first test at the telescope performed on April 5-9, 2001.

   Mr. Kämpf optimizes the receiver          

    The Wave Guides - 3 Channels: Main Horn (right and left circular), Offset Horn (left circular)

         The 2 Feeds, Angular Separation: 56"

        In the Prime Focus      
    "First Light on Jupiter"   Focusing on the Moon
    Testing Frequency Tuning on Orion's SiO Maser
    Resolving the Planetary Disk of Venus
    Determination of System-Temperature: about 155 K in RCP, average atmospheric opacity 0.1
    Fringe detection on the baseline Effelsberg to Pico Veleta, 3C279, SNR = 300 !
last modified on:   Monday, May 7 15:28:44 2001
T.P. Krichbaum (tkrichbaum@mpifr-bonn.mpg.de)