Preliminary Tatiana data

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 ??
• 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 Transient Luminous 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 night measured 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.