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Three-module experimental radiometric matrix was designed and put
in operation successfully. Flowchart of the one channel is shown
in Figure 1. The receiver module is about the same, as for
![]() Figure 1. MARS-2. Flowchart of the single channel.
The input switch is a latching WR-28 waveguide circulator,
driven by alternate polarity current pulse sequence ( I = 8 - 10 A;
t = 2 - 3
![]() Figure 2. The receiver module and switch assembly. The elementary radiometers are combined ( figure 3 ) into the microwave unit ( one pair of horns shown is out of use ), where they integrated to use unified systems for calibration, power supply and temperature control. ![]() Figure 3. HF part of the MARS-2 radiometric system.
The MARS-2 system was installed at the feed cabin No.1 of the
RATAN-600 radio telescope ![]() Figure 4. The focal line of the RATAN-600 radio telescope ( feed cabin No.1 ).
To illustrate the results, two beam-switching recordings of
the radio source are shown in ![]() Figure 5. Sensitivity comparison of the MARS-2 uncooled elementary radiometer and of the cryoradiometer at nearest wavelength 1.38 cm. The results of the MARS-2 investigation are used now as a basis for development of the next phase of the Project - 16 module matrix MARS-3 [2].
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