UDC 537.87, 621.371
Deep georadiolocation
L.B. Volkomirskaya1,2, O.A. Gulevich1,2, G.A. Lyakhov3, A.E. Reznikov1,2
1
Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation,
Russian Academy of Sciences
Kaluzhskoe shosse, 4, Troitsk, Moscow 108840, Russia
2
“Timer” LLC, ul. Lesnaya, 4B, Troitsk, Moscow 108840, Russia
3
Wave Research Center, Prokhorov General Physics Institute, Russian Academy of
Sciences, ul. Vavilova, 38, Moscow, 119991 Russia
The paper is received on March 31, 2019
Abstract.
GPR method began to develop from the
middle of the twentieth century and by the end of the century was effectively
applied in solving some geophysical problems in the upper layers of the earth's
surface. With the exception of the thick ice sounding in the polar regions,
however, the method was effective only in studying the first tens of meters of natural
media with low absorption of electromagnetic waves. For the further development
of the technology an increase of the penetration depth is crucial.
The
influence of the shape of the transmitted pulse on the penetration depth and
resolution of the GPR method is analyzed. The features of constructing radar
devices for subsurface sensing of media with high attenuation and dispersion
are discussed. Design features of radar devices for subsurface sensing of media
with high attenuation and dispersion are discussed. It is noted that the theory
of interaction of video pulses with absorbing disperse media is currently not
sufficiently developed for many applications. The lack of developed theory
about the model of interaction of video pulses with absorbing media with high
dispersion complicates the solution of the inverse problem of reconstructing
the medium parameters from experimental GPR data.
Experimental
results obtained during GPR studies at depths of more than 100-500 meters in
Yakutia are given. The advantage of using high-voltage video pulses for the
study of natural media with high attenuation and dispersion is confirmed. Quantitative
estimates of the attenuation of the video pulse signal made for media with
different lithological composition. The results obtained can serve as an
experimental basis for creation of local radio communication systems and
radiosounding of disperse media with high attenuation.
Key words: GPR,
video pulse, dispersion media.
References
1.
Reznikov A.E., Kopeikin V.V., Morozov P.A., Shchekotov A.Yu. Development of
apparatus and data processing methods for electromagnetic subsurface probing
and experiments with their practical implementation. Uspekhi Fizicheskikh Nauk
- Advances in Physical Sciences, 2000, Vol.170, No. 5, pp. 565-568. DOI:
10.1070/PU2000v043n05ABEH000793.
(In Russian)
2.
Rudenchik E.A., Volkomirskaya L.B., Reznikov A.E.,
Bezrukova E.G. Analytical Representation of
the field surface wave generated by an antenna at the interface of two homogeneous media. Physics
of Wave Phenomena, 2010, Vol. 18, No. 2, pp.1-9.
3.
Landau L.D., Lifshits E.M. Elektrodynamika sploshnykh sred. [Electrodynamics
of Continuous Media]. Moscow,
Nauka Publ.,
1982, 389 p. (In Russian)
4.
Vladov M.L., Starovoytov A.V. Vvedenie v georadiolokaziyu. [Introduction
to GPR]. Moscow,
Moscow State University Publ.,
2004, 153 p. (In Russian)
5. Rudenchik E.A., Volkomirskaya L.B.,
Reznikov A.E. Study of Signal Propagation in One-Dimensional Electrodynamics
for Interpretating Electromagnetic Sounding Data. Consideration of Conductivity
in the Function of Permittivity. Physics of Wave Phenomena, 2008, Vol.
16, No. 2, pp. 1-14.
6. Volkomirskaya L., Gulevich O., Rudenchik
E. Georadiolokaziya v sredakh s dispersiey. Zavisimost’ amplitudy i formy
impulsa georadara ot dispersii sredy. [Ground-penetrating radar in media
with dispersion. The dependence of the amplitude and the pulse shape of GPR on
the media dispersion]. LAP - LAMBERT Academic Publ., 2013, 81 p. (In Russian)
7.
Varenkov V.V., Volkomirskaya L.B., Gulevich O.A., Gorkin D.S., Reznikov A.E., Sakhterov
V.I. Evaluation of the effective use of high resolution electric exploration at
Samolazovskoe gold and skarn deposit. Marksherderiya i nedropolzovanie - Mine
surveying and subsurface use, No. 4, 2018, pp. 8-13. (In Russian)
8. Ivanov A.G. Fizika v
razvedke zemnikh nedr. [Physics in the exploration of the earth's interior].
Moscow, Nedra Publ., 1971, 200 p. (In Russian)
9. Mogilatov V.S. Impulsnaya
elektrorazvedka. [Pulsed electric prospecting]. Novosibirsk, Novosib. State
University Publ., 2002, 208 p. (In Russian)
10. Epov M.I., Eltsov I.N. Pryamye
i obratnye zadachi indukivnoy geoelektriki v odnomernykh sredakh. [Direct
and inverse problems of inductive geoelectrics in one-dimensional media].
Novosibirsk, OGGiM SB RAS Publ., 1992, No. 2, 31 p. (In Russian)
11. Volkomirskaya L.B., Gulevich O.A.,
Reznikov A.E. Deep georadar discovers the secrets of a giant crater on the
Yamal Peninsula. Ekologicheskiye systemy i pribory - Ecological systems and
devices, 2017, No. 7, pp. 43-51. (In Russian)
12. Shvartsburg A.B. Single-cycle waveforms
and non-periodic waves in dispersive media (exactly solvable models). Uspekhi
Fizicheskikh Nauk - Advances in Physical Sciences, 1998, 168, No. 1,
pp. 85-103. DOI:
10.1070/PU1998v041n01ABEH000331. (In Russian)