MA-TEC Ltd, in cooperation with the Research Radiophysical Institute (NIRFI, Nizhny Novgorod), develops and maintains software for processing big data recorded by radio interferometers with very long baselines.
A radio interferometer is a system of synchronous operating radio telescopes located at various points on the surface of the globe.
The idea to create the very long baseline radio interferometers (VLBI) was formulated in 1965 by Soviet scientists L.I.Matveenko, N.S.Kardashev and G.B.Sholomitsky. They proposed to independently register data on each separate radio telescope in a computer format, synchronizing the recordings using ultra-precise atomic clocks, and then jointly process the signals, realizing their interference on a computer.
Since individual radio telescopes can be located at a distance of thousands of kilometers from each other, the realizable measurement accuracy turns out to be tens of thousands of times higher than the accuracy of the best optical instruments.
When using this method, a complex problem arises of compensating for changes in received signals due to the rotation of the Earth, which leads to costly calculations on a computer using a very complex program called a correlator. This type of interferometer is called a Very Long Baseline Interferometry (VLBI) radio interferometer.
The main objects studied by the worldwide network of many hundreds of radio telescopes are quasars and the black holes that generate them, as well as asteroids, space debris and artificial satellites irradiated from Earth.
Measurement data of the parameters of black holes are of the greatest value, since they allow realizing a global coordinate system, the quality of which will not be surpassed in the foreseeable future.
Apparently, the VLBI network is the source of the largest data volume, since a separate radio telescope registers from 16 Mb to 16 Gb per second during many hours of observation sessions.
Quasar Radiation Analysis Results 
Here are observation results of quasar 3C345 radiation with two radio telescopes: Bear Lakes (near Moscow) and Noto (Sicily, Italy). The yellow line is the correlation function of quasar radiation. The noisy signal level at the correlator input is more than 10 000 times greater than quasar signal one.