VLF campaign during the total eclipse of July 22nd, 2009: Observational results and interpretations

被引：25

作者：

Chakrabarti, S. K. ^{[1
,2
]}

Pal, S. ^{[1
]}

Sasmal, S. ^{[2
]}

Mondal, S. K. ^{[2
]}

Ray, S. ^{[2
]}

Basak, T. ^{[1
]}

Maji, S. K. ^{[2
]}

Khadka, B. ^{[2
]}

Bhowmick, D. ^{[2
]}

Chowdhury, A. K. ^{[2
]}

机构：

[1] SN Bose Natl Ctr Basic Sci, Kolkata 700098, India

[2] Indian Ctr Space Phys, Kolkata 700084, India

来源：

JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS | 2012年 / 86卷

关键词：

VLF radio waves; Waveguides; Ionospheric phenomena; Solar Eclipse; TOTAL SOLAR ECLIPSE; INDIAN SUBCONTINENT; SIGNALS; SUMMER; WINTER;

D O I：

10.1016/j.jastp.2012.06.006

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A Total Solar Eclipse (TSE) provides us with an exciting opportunity to study the VLF propagation effects under a controlled experimental condition where the extreme ultraviolet and the X-rays from the sun are totally blocked by the moon. During the total eclipse of July 22nd, 2009, the Indian Centre for Space Physics conducted a VLF campaign to obtain the signal from a dozen of places in the Indian subcontinent. Six of these locations gave very good and noise-free data. In some of these data, the signal amplitude is found to be higher than that at non-eclipse condition, while in some other places, it is lower. We present the results of our campaign and give an interpretation of the results using the Long Wavelength Propagation Capability (LWPC) code in a perturbed waveguide both for the easterly and westerly propagation paths. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：65 / 70

页数：6

共 14 条

[1] International Reference Ionosphere 2007: Improvements and new parameters [J].

Bilitza, D. ;

Reinisch, B. W. .

ADVANCES IN SPACE RESEARCH, 2008, 42 (04) :599-609

[2] THEORY OF FORMATION OF AN IONOSPHERIC LAYER BELOW E-LAYER BASED ON ECLIPSE AND SOLAR FLARE EFFECTS AT 16 KC SEC [J].

BRACEWELL, RN .

JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1952, 2 (04) :226-235

[3] 26 FEBRUARY 1979 TOTAL SOLAR ECLIPSE INDUCED LF (60 KHZ) PHASE RETARDATION [J].

BUCKMASTER, HA ;

HANSEN, CH .

JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1986, 48 (04) :393-397

[4]

Budden K., 1966, Radio waves in the ionosphere

[5] VLF signals in summer and winter in the Indian sub-continent using multi-station campaigns [J].

Chakrabarti, S. K. ;

Mondal, S. K. ;

Sasmal, S. ;

Pal, S. ;

Basak, T. ;

Chakrabarti, S. ;

Bhowmick, D. ;

Ray, S. ;

Maji, S. K. ;

Nandi, A. ;

Yadav, V. K. ;

Kotoch, T. B. ;

Khadka, B. ;

Giri, K. ;

Garain, S. K. ;

Choudhury, A. K. ;

Partra, N. N. ;

Iqbal, N. .

INDIAN JOURNAL OF PHYSICS, 2012, 86 (05) :323-334

[6] Results of VLF campaigns in Summer, Winter and during Solar Eclipse in Indian Subcontinent and Beyond [J].

Chakrabarti, Sandip K. ;

Sasmal, S. ;

Pal, S. ;

Mondal, S. K. .

PROPAGATION EFFECTS OF VERY LOW FREQUENCY RADIO WAVES, 2010, 1286 :61-+

[7] Total solar eclipse effects on VLF signals: Observations and modeling [J].

Clilverd, MA ;

Rodger, CJ ;

Thomson, NR ;

Lichtenberger, J ;

Steinbach, P ;

Cannon, P ;

Angling, MJ .

RADIO SCIENCE, 2001, 36 (04) :773-788

[8] Ionospheric D region remote sensing using VLF radio atmospherics [J].

Cummer, SA ;

Inan, US ;

Bell, TF .

RADIO SCIENCE, 1998, 33 (06) :1781-1792

[9] LOWER IONOSPHERE EFFECT OBSERVED DURING THE 30 JUNE 1992 TOTAL SOLAR ECLIPSE [J].

DACOSTA, AM ;

LEME, NMP ;

PIAZZA, LR .

JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1995, 57 (01) :13-17

[10]

Fergusson J.A., 1990, 1773 NAT OC SYST CTR

← 1 2 →