Программа и тезисы докладов - Институт космических ...

field recordings for detailed analysis. Applying our real full wave (UWB) propagation
code, and utilizing the high sensibility of the satellite sensors, proper interpretation
of amplitude modulated character of trans-ionospheric whistlers was possible
as closely spaced oblique propagated impulses. This technique provides more accurate
information about the generation (lightning flash) mechanism. Results of UWB
modeling of lightning excited impulse propagation in the anisotropic ionosphere
confirmed the conlusions of earlier studies, performed in higher altitude satellite recordings.
Swallow tailed whistler (STW) occurrences has been demostrated in Chibis
records. Unlike to already known, published character of STWs, these cases were
coupled to 0 + whistler types. With the analysis of newly found STW occurrences
their source region, exciting process may be better described.
The iniTial reSulTS oF MagneTic-Wave coMplex
daTa proceSSing (MicroSaTelliTe “chibiS-M”)
S. M. Belyaev, D. F. Dudkin
Lviv Centre of Institute for Space Research (LC ISR) of the National Academy
of Sciences of Ukraine and National Space Agency of Ukraine, Lviv, Ukraine
Scientific equipment complex “Groza” of “Chibis-M” includes magneticwave
complex (MWC) consisting of 2 combined wave probes (CWP1, CWP2), an
induction magnetometer and a spectral analysis processor (SAP). MWC is meant
for measuring and examining space weather electromagnetic parameters within the
band of 1 Hz — 20 kHz.
MWC detectors are set on the micro-satellite in such a way that the induction
magnetometer and magnetic field measurers, belonging to wave probes, form
orthogonal coordinate system, and the plates of space plasma current measurers
of both wave probes are mutually perpendicular. This configuration allows for measuring
3 components of magnetic field induction, 2 components of space current
density and electric field intensity.
Analogue output voltages of detectors are transformed into a digital form
and undergo primary treatment in the spectral analysis processor. Resulting data
streams are transmitted to the ground contact points.
During data processing intense disturbance coming from the onboard equipment
of the micro-satellite were registered. This was caused by the proximity of
detectors to other devices of the scientific equipment complex. After the onboard
disturbance examination new methods and algorithms of digital data filtering were
elaborated and tested. The onboard recordings demonstrated great effectiveness
of these algorithms.
The analysis of telemetry packets received from MWC in contingency (power
shortage) has indicated the sufficient stability of equipment and modes adopted in
such situations.
In the process of filtered data analysis whistler waves illustrating ionosphere
electromagnetic processes were detected. The most qualitative results were obtained
on the examination of measurements of magnetic field induction and electric field
intensity. Least informative were the channels of current measuring.
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