Космический эксперимент "Сейсмопрогноз-СМ"The twelfth item in the section "Space Education. Cosmonauts Explain Things and Tell Stories".

Report on space еxperiment «Seismoprognoz-SM» made by cosmonauts Ryazansky Sergei Nikolaevich and Kotov Oleg Valerievich from the ISS RS.

(Kotov). Now we'll tell you about geophysical Experiment Seismoprognoz-SM staged by Institute of Tessestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences (IZMIRAN). Seismoprognoz-SM Experiment is conducted to determine the temporal and spatial extent of ionospheric disturbance effects and the algorithm development to detect the plasma features of approaching earthquakes and anthropogenic impacts based on the measurement data onboard the International Station.
The objects of investigations in SE are:
– characteristics of electromagnetic high-frequency (HF) oscillation in near – Earth plasma;
– VHF wave – radio signal propagation characteristics;
– GLONASS and GPS satellite system radio signal propagation characteristics.
The International Space Station is a scientific laboratory where the development a procedure of the global earthquake prediction system is tested. The problem solved by the experiment investigators is to measure the plasma oscillation spectrum in the ionosphere, detect anomalies in the measured spectrum, compare these anomalies with the subsequent earthquakes and test the monitoring methods of forerunners of earthquakes from spacecraft (SC).
Now we'll show You two units of Seismoprognoz hardware. This is a stand-alone temperature control module which maintains a temperature of the main unit located on the outer surface of the Service Module and the data control and acquisition module for the active mode of the experiment during which scientific information enters it automatically from the external module of the hardware, preliminary processing is provided, as well as long-term storage of the results.

(Ryazansky) On December 27, 2013 we installed the external measurement unit of Seismoprognoz hardware on the outer surface of the Service Module on handrails between planes II and I. It is shown in the Figure.

Seismoprognoz science hardware monoblock location on the outer surface of SM
Seismoprognoz science hardware monoblock location on the outer surface of SM

The external unit antenna except reception of electromagnetic high-frequency oscillation is used as an impedance probe which allows to determine the plasma parameters around the Space Station. The second antenna (rev., - a white rectangle on the green body of the external unit of the hardware) is intended to receive signals from GPS and GLONASS satellites and jointly with the satellite navigation equipment module is used to obtain information on the plasma ionization along the propagation path of the navigation signals. Our task during EVA-37 was to deliver science hardware Seismoprognoz to the required area, dismantle from it the Vsplesk hardware which performed its scientific task, install Seismoprognoz hardware at its place and connect to the cable network assembled by us inside the pressurized module of the Station (rev., - see video).

Сейсмопрогноз. Выход космонавт...
Сейсмопрогноз. Выход космонавтов в открытый космос

(Kotov) Thus, we told You about the crew work timeline when preparing for geophysical experiment Seismprognoz. This timeline is typical for any other science hardware which must be installed on the outer surface of the Station. This is an installation of internal units inside the Station. Usually it is the hardware control unit and the storage area for the experiment results, installation of the penetration plate internal cables, mounting of the external unit and installation of the external cables to the penetration plate outside the Station.
After all these operations the MCC confirmation of the mating reliability of all cables in this circuit is required.
And now we'll show You the results of experiment Seismoprognoz which were specially resent to us by the experiment investigators after their processing (On the graphics screen there are radio frequency signal spectra after processing of information obtained during RFEM operation on January, 28).

Spectrum No. 1
Figure 4. Spectrum No. 1

Spectrum No. 8
Figure 5. Spectrum No. 8

Spectrum No. 237
Figure 6. Spectrum No. 237

The amplitude of RF signal in relative units of a logarithmic scale is plotted on the vertical axis of the graph. The signal frequency in kHz is plotted on the horizontal axis of the graph. One can say that in Figures 4, 5, 6 we see spectral traces of electromagnetic noise in the frequency band from 100 kHz to 40 MHz, generated by signal sources of both artificial and natural origin.
The main task of the subsequent analysis of the electromagnetic noise spectrum consists in studying the behavior of its different patterns in time, in space and under different geophysical and heliophysical conditions to discover factors defining the kind of the spectrum and its behavior, that is to say, determination of radio signal sources and distribution thereof.

Космический эксперимент "Сейсм...
Космический эксперимент




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