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D.V.Skobeltsyn Institute of Nuclear Physics , Moscow State University,

The new information about UV radiation of the Earth's atmosphere according to the «Universitetskij-Tatiana-2» data. D.V.Skobeltsyn Institute of Nuclear Physics , Moscow State University, Vorobjevy Gory 1, Moscow 119992, Russia. OBJECTIVE OF THE EXPERIMENT.

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D.V.Skobeltsyn Institute of Nuclear Physics , Moscow State University,

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  1. The new information about UV radiation of the Earth's atmosphere according to the «Universitetskij-Tatiana-2» data D.V.Skobeltsyn Institute of Nuclear Physics, Moscow State University, Vorobjevy Gory 1, Moscow 119992, Russia.

  2. OBJECTIVE OF THE EXPERIMENT • Simulataneous research of the transient events by means of optic and charged particles detectors. • The studies of the connections between the transient events and the processes in the near-Earth space and atmospheric processes in the electrically-active zones of the Earth. • Detectors onboard «Tatiana-2» satellite: • Charged particles detector with total area of 400 cm2 (FZK) • UV (300-400 nm) and red (600-700 nm) radiation detector (DUFIK)

  3. Carrier rocket: “Soyuz-2”Upper-stage rocket “Fregat” Operating orbit: Polar Sun synchronous Altitude: 800 – 850km Inclination 98.80 Mass: 100kg Power: 100W Contribution from: • MSU • VNIIEM • EWHA Woman's University, Seoul, Korea • University of Puebla (BUAP), Puebla, Mexico.

  4. «Tatiana-2» launching 17.09.2009

  5. «Tatiana-2» satellite's orbit

  6. DUFIK and FZK detectors' block diagram • Digital oscilloscope: • Oscillogram width — 128 мс • Integral action time for trigger output — 1 ms • Fixation of the most powerful event during the minute Automatic arrangement of photomultiplier amplification High voltage changes depending on UV background

  7. Research of the TransientLuminous Events (TLE): blue jets, sprites, gigantic jets, elves.

  8. UV flashes registration examples

  9. Geographical distribution of the flashes measured by «Tatiana-2» detector in October-November 2009

  10. One day transient flashes distribution on the Global clouds map 16 of November 2009

  11. Typical distribution of the lightnings above the clouds during the hours of the maximum thunderstorm activitey (by http://wwlln.net)

  12. Oscillogram example. Simultaneous measurements of ultraviolet, infrared and charged particles density.

  13. Town UV light at nightmeasured by “Tatyana-2”

  14. Global charged particles distribution measured by “Tatyana-2” November 2009

  15. UV flashes global distribution on the map of total column water vapor

  16. Conclusion • The global distribution of the transient flashes (over 1000 events) is obtained • Portion of flashes is observed in the cloudless regions • It is proved that the transient discharges are produced not only by lightnings as it was considered by now but also by other reasons which are still unknown • The flashes are not detected by the Global network of lightning registration by means of radio signals within the range of ultra-long waves. It indicates that the flashes are located higher than the lower boundary of the ionosphere. • The flashes are not observed above Sahara desert. Probably, it indicates the important role of the water vapor in the production of the Earth's electric field not only in the troposphere, but also in the ionosphere. Data processing is in progress.

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