Bulgarian Academy of Sciences (BAS)

Solar-Terrestrial Influences Laboratory (STIL)

Space Radiation Investigation Group (SRIG)



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What are we doing?



Space radiation investigation group of Solar-terrestrial influences laboratory (STIL) is working now on the:

- Analysis of the obtained space radiation data from “MIR” and ISS space stations and from long-term commercial aircraft flights;

- Development, calibrations, testing and operations of a new generation space and airborne 256 channels spectrometry systems of Liulin-4 type.


New: Spurný, F., Ts. Dachev, Long-Term Monitoring of the Onboard Aircraft Exposure Level With Si-Diode Based Spectrometer, Advances in Space Research, 32, No 1, 53-58, 2003.


More details for the presented below spectrometry systems (pdf)




Liulin instrument worked successfully on MIR space station in 1988-1994 time frame

Liulin-E094 instrument operated by Second crew on ISS in May-August 2001 time frame

Two of the Liulin-MKC dosimeters and CIU, which will be operated on Russian segment of ISS for 15 years. Launch is scheduled for 2003

Large size Liulin spectrometer for up to 100 days aircraft dosimetry use


R3D view as mounted inside of EXPOSE facility.

It will flow on ESA EXPOSE facility on International Space Station for 1.5 years

R3D-B instrument, which is prepared for ESA Biopan mission on Foton-1M satellite

8 channel Data Acquisition System with a GPS receiver for 3D geographical and time positioning

Liulin spectrometer for aircraft dosimetry with rechargeable Sony Li-ion battery for about 30 days use




Liulin-4S spectrometer for continuous monitoring of the space radiation at aircraft altitudes with a GPS receiver for 3D geographical and time positioning







How to contact us:

Telephone: +359 2 870 0307 or +359 2 979 3209

FAX: +359 2 979 7080 or +359 2 870 0178

Mail address: Solar-Terrestrial Influences Laboratory,

Bulgarian Academy of Sciences, Acad. G. Bonchev St. Block 3

1113 Sofia, Bulgaria

E-Mail: General Information: Senior Res. Sci. Tsvetan Dachev, Ph. D.


Last modified: 22 June 2004