The spectrometric complex of the RATAN-600 radio telescope is intended for investigation of centimeter radio lines and allocated in the secondary mirror cabin N 2. It consists of microwave receivers and spectrum analyzers which parameters are tabulated below. There is a system of stable computer driven local oscillators that have accuracy about 10 to degree -8.
User has an opportunity to arrange the necessary spectrometer structure.
Spectrometer driving system is accomplished with two DVK-4 computers
and one IBM PC and make possible to develop radio line observations
on the frequency band pass of the input low noise amplifiers ( LNA ):
The performance of spectrometric complex is controlled by program
driving system ( PDS ) and the data gathering and recording system ( DGS ).
For adjustment of the spectral reseivers to changing observational conditions the next preparatory operations are automatically fulfilled before each observation:
Special software batch was created for carrying out of spectrometric observation in the various modes:
PDS supplies modulation and compensation modes of spectrometer operations. The last one is implemented with acoustic optical analyzer in the range of integration time up to 20--30 min. and gives advantage in sensitivity by two times. The data obtained are recorded to the computer hard disk and immediately displayed on the monitor. Then these data may be reduced to antenna temperature scale, cleaned from interferences and arranged to necessary format. Further they may be transmitted through the local network of the RATAN-600 to the central server or to any computer in the network. They may be accumulated on the Zip-diskettes too. An example of HI drift curves is shown on the Figure.
The special soft ware was created for consequent reduction. It makes possible, in the first place, to see obtained data on the screen and to take any hard copy of drift curves, profiles or contours in any region of coordinates. Secondly, data may be reduced for
All these function work with displaying results on the screen and store them
on the files. For three dimensional data ( alpha , delta , V )
there is an opportunity to obtain a cross-section with any pairs of
The equipment and soft wear are in operation during many years and
have displayed their high operational quality.
The losses of observational
time due to equipment failure are no more then 3%, that is much less
than due to weather conditions, power supply or operator mistakes.