VLF Research in India and Setup of AWESOME Receivers by B. Veenadhari, et al., Indian Institute of Geomagnetism, Navi Mumbai, India, June 2009

7/30/2019 VLF Research in India and Setup of AWESOME Receivers by B. Veenadhari, et al., Indian Institute of Geomagnetism, Navi Mumbai, India, June 2009.

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RJB Si}ilsme fo Fogfl log }iwyq dbLXI]DKI Simifris}

C/ Riiolgelsf* Slni}e ]fohe* Q/ Rdelw log L/ KlysvlFogflo Fo}wfwywi db Hidklhoiwf}k* Olrf Kykclf* Fogfl

Q/ Qlow* LSFI]* Olfofwlj* Ywwsl`elog* Fogfl

L/@/ ]fohe* Qev}fm} Giqlswkiow* Clolsl} Efogy Yofris}fwv*Rlslol}f* Fogfl

LGRLOMFOH RJB ]MFIOMI WESDYHE WEI HJDCLJ LXI]DKIOIWXDS@* =1+Klv wd 1


2/38

Dywjfoi db wlj`

Fowsdgymwfdo

Wei ilsjfis RJB si}ilsme xds` fo Fogfl* efhe jfhew} log

jfkfwlwfdo}Wei kdwfrlwfdo db }iw yq db oix LXI]DKI fo}wljjlwfdo logFEV YOC]] fofwflwfdo

Fkqdswlomi db RJB }wlwfdo}* dweis }yqqdswig glwl bsdkkyjwf fo}wsykiow dc}isrlwdsfi}

Fofwflj dc}isrlwfdo} log si}yjw} db y}foh qsi}iow RJBLXI]DKI simifris} lw Fogfl

Bywysi qjlo}


3/38

Xef}wjis} log RJB ikf}}fdo}>Klfo xef}wjis kdgi xlri} fomjygi> Jfhewofoh xef}wjis}* Wsfhhisig

ikf}}fdo}* Ef}}* Medsy}* iwm/Hioislwig ifweis cv jfhewofoh }wsf`i} ds cv xlriqlswfmji fowislmwfdo fo weiklhoiwd}qeisi

Xef}wjis}Hioislwig cv

Xef}wjis

]qimwsyk

Jfhewofoh Qsdqlhlwi ljdoh hidklhoiwfm bfijg jfoi Gf}qis}ig

Cv loljv~foh gf}qis}fdo mysri db wei RJB xef}wjis xlri}* qjiowv dbfobdsklwfdo lcdyw wei klhoiwd}qeisfm kigfyk mlo ci dcwlfoig rf~/> Ijimwsdo gio}fwv

Wdwlj ijimwsdo mdowiow fo l bjyu wyci Ijimwsfm bfijg


4/38

Edx Fkqdswlow lsi RJB }fholj} fo Fogflo Jdx jlwfwygi sihfdo4

Fogflo MdonyhlwiSihfdo

Fogfl f} l risv fowisi}wfoh jdmlwfdo bds }irislj sil}do} jf`i>

mdonyhlwi sihfdo db wei Fogfl jfi} foFogflo Dmilo

ji}} jfhewofoh lmwfrfwv iuqimwig

Lj}d wei eifhew db wei klhoiwfm bfijgjfoi} % 511 `k klu/& mdooimwfohmdonyhlwi sihfdo} jfi} fo wei

fdod}qeisiQsdclcji lc}dsqwfdo db }fholj}

Odw iodyhe RJB lmwfrfwv iuqimwig


5/38

Irio wedyhe risv fowisi}wfoh simdsg} db xef}wjis}$RJBxlri} lw Fogflo Jdx jlwfwygi jdmlwfdo} el} ciio dc}isrig

jfì> Xef}wjis}

RJB ikf}}fdo} jfì mdowfoydy} log qyj}foh ef}}

Qisfdgfm ikf}}fdo}

Ef}} wsfhhisig ikf}}fdo}

Xef}wjis wsfhhisig ikf}}fdo}

Ef}}jis* iwm /

RJB ikf}}fdo} jfì xef}wjis} f} lj}d l mjl}} db olwyslj slgfdqeiodkiol* xed}i dsfhfo f} fo klhoiwd}qeisfm }dysmi} ds fo kloklgi }dysmi} }yme l} RJB wslo}kfwwis}/

Hioislwfdo kimelof}k db RJB ikf}}fdo} lsi qddsjv yogis}wddg*log weiv siklfo wei bdmy} db fowio}i si}ilsme lmwfrfwv/


6/38

Cimly}i db mysrlwysi db klhoiwfm bfijg jfoi lw jdx jlwfwygi* fw f}gfbbfmyjw wd hiw gdxo mdkfoh xef}wjis kdgi %XK& xlri fo}fgi weiXK wslo}kf}}fdo mdoi

Fkqdswlomi db }dysmi jdmlwfdo db RJB }fholj} fo jdx jlwfwygi

L} l si}yjw* |yfiw l cfw db lmwfrfwv }iio lw jdx jlwfwygi} klvelri iufwig lw lo fdod}qeisfm iufw qdfow lw }dki xelw efheis

jlwfwygi} log weio qsdqlhlwig fo wei Ilswefdod}qeisixlrihyfgi wd wei dc}isrlwfdo qdfow

Bysweiskdsi lw jdx jlwfwygi xi iuqimw XK xlri} iumfwfohfdod}qeisi cdwe fo wei Odswe log ]dywe wd silme wei dc}isrlwfdojdmlwfdo


7/38

RJB Si}ilsme fo Fogfl + ]wlwy} ]ddo lbwis wei y}lhi db xef}wjis} log RJB xlri} xl} hlfofoh

fkqdswlomi fo


8/38

]dki iulkqji} db dc}isrlwfdo

Bfh/ ]qimwsdhslk db Ef}}jis %Sib> ]fohe iw lj/* HSJ* 3117&

Bfh/ ]qimwsdhslk db Qyj}foh Ef}}


9/38

Fkqdswlow dc}isrlwfdo}

Gfbbisiow xef}wjis} jf`i }edsw* gfbby}ig* kyjwfblj}e*

kyjwfqlwe* wxfo }vomesdof~ig iwm

Ikf}}fdo} jf`i ef}}* qyj}foh ef}}* sf}is}* wsfhhisig*qisfdgfm* |yl}f qisfdgfm iwm xisi dc}isrig lw jdx

jlwfwygi} db Fogflo }imwds %]dklvlnyjy iw lj/*


10/38

Klfo jfkfwlwfdo}

Wei W wvqi lowiool simdsg} I~ mdkqdoiow} db wei xlri} log

riswfmlj lowiool} lsi eilrfjv kl}`ig cv jdmlj odf}i} mdkqlsig wdjddq lowiool/

Ljj }fwi} y}ig loljdh }v}wik} log }fohji melooij I~

kil}ysikiow} xefme jfkfw} wei }mfiowfbfm lqqjfmlwfdo logfowisqsiwlwfdo db glwl/

Odw qd}}fcji bds gfsimwfdo bfogfoh xefme f} i}}iowfljjv mdo}fgisig

lw kfg log efhe jlwfwygiBysweis wslgfwfdolj }v}wik y}ig bdsclgi wei y}i db RJBwslo}kfwwis }fholj l} weisi xl} od blmfjfwv wd kdofwds wed}i }fholj}/

Cimly}i db wei}i jfkfwlwfdo}* qsdcfoh db G sihfdo fdod}qeisfmelri odw ciio hfrio gyi lwwiowfdo lw jdx jlwfwygi}/

Wei }djls bjlsi ibbimw} log klhoiwfm }wdsk} }wygfi} do G sihfdo

fdod}qeisi elri odw ciio qd}}fcji cimly}i db odo lrlfjlcfjfwv dbOlssdx clog glwl/


11/38

Xfwe wei l}}dmflwfdo db FEV YOC]] qsdhslk* l mdjjlcdslwfdo ciwxiio

]wlobdsg Yofris}fwv log Fogflo Fo}wfwywi db Hidklhoiwf}k el} klgi gysfoh3118

Wesii LXI]DKI RJB simifris} xisi fo}wljjig log kdofwdsfoh olwyslj log}ycfdod}qeisfm RJB }fholj} mdowfoydy}jv/ Wef} xfjj eijq y} fo ciwwisyogis}wlogfoh db RJB xlri qeiodkiol fo jdx jlwfwygi sihfdo

Wei LXI]DKI simifris} lsi giqjdvig lw Gs @] @sf}eolo Hidqev}fmljSi}ilsme Jlcdslwdsv* FFH* Ljjlelclg %


12/38

Iuqisfkiowlj ]iwyq>RJB Simifris

fo}wljjigLXI]DKI RJB Simifris ]wlobdsg Yofris}fwv

Mlqlcji dbmdjjimwfoh

Olssdxclog+

Csdlgclog RJB glwl

Lkqjfwygi log Qel}i db Wslo}kfwwis }fholj

]lri} iowfsi RJB }fholj }qimwsyk

Msd}}ig jddq lowiool


13/38

Jdmlwfoh wei }dysmi db dc}isrig RJB }fholj} fo Fogfl xl} ljxlv} lqsdcjik* cimly}i db wei lc}iomi db Gfsimwfdo Bfogfoh

kil}ysikiow}/Wei RJB simifris y}ig xl} risv }fkqji Wwvqi lowiool* qsi logklfo lkqjfbfis} log l klhoiwfm ml}}iwwi wlqi simdsgis

Wesii Melooij LXI]DKI mlo kil}ysi

U mdkqdoiow %Odswe]dywe&

V mdkqdoiow %Il}wXi}w&

I~ Riswfmlj Ibfijg %fowisi}wig wd fo}wljj lw doi }fwi lw jil}w&

I~ kil}ysikiow f} y}ibyj bds }wygvfoh oils fdod}qeisfm iufw

}fholj log lj}d wd sikdri


14/38

Yogis FEV$YOC]]F qsdhslk

Rlslol}fJlw/


15/38

RJBsimifris}}fwi}

Fkqdswlomi db RJB }fwi}


16/38

Fkqdswlomi db RJB }fwi}

Ljjlelcg % L efhe ljwfwygi dc}isrlwdsv xfwe jdxis Lwkd}qeisfmdc}isrlwfdo}* ]djls dc}isrlwfdo} lsi kdofwdsig sihyjlsjv log ci}w jdmlwfdobds }qsfwi} dc}isrlwfdo} fo bywysi

Rlslol}f %


17/38

RWU

OXM

NNF=]L

FMREXY

BWL3

GE\HCS

Ljjlelclg

Olfofwlj

RO]

Kdofwds olwyslj log }ycfdod}qeisfm RJB }fholj} mdowfoydy}jvxfwe LXI]DKI simifris}/

Klwjlc mdgi} lsi girijdqig bds glwl loljv}f}

Qdsw Cjlfs*

LoglklokyjwfqlslkiwisDc}isrlwdsv

i}}iowflj bdsI\ }wygfi}


18/38

Glwl ]wdslhi > 391 HC qdm`iw iuwisolj elsg gf}`} lsi y}ig wd }wdsi weiglwl lw }fwi} log bfolj glwl f} }wdsig fo }isris lw FFH eilg |ylswis}

%Kykclf&/

Dcnimwfri}>

Yogis}wlog wei hioislwfdo log qsdqlhlwfdo kimelof}k db olwysljjvdmmyssfoh RJB xlri} fo jdx jlwfwygi sihfdo/

Wd fori}wfhlwi jdohwisk wsiog} db klhoiwd}qeisfm qlslkiwis} }yme l}

ijimwsdo gio}fwv* wdwlj ijimwsdo mdowiow fo l bjyu wyci log ijimwsfm bfijg} gysfoh|yfiw log lmwfri }djls qisfdg}/

Mdssijlwfdo ciwxiio RJB xlri lmwfrfwv log hidklhoiwfm lmwfrfwv/

Sikdwi }io}foh db wei jdxis fdod}qeisi* jfhewofoh log weyogis}wdsk}/

RJB xlri} l} qsimys}ds} wd Ilswe|yl`i}/


19/38

]djls Bjlsi Giwimwfdo

Md}kfm Hlkkl Slv}

Medsy} Ikf}}fdo} Jfhewofoh

Xef}wjis xlri}

JIQ Iriow}* eyssfmloi}wygfi}

Ilsjv$bl}w Iriow}

Ki}d}qeisfm jfhewofohgf}melshi}

]qsfwi}* ijri}* cjyi niw}*WHB}

Ijimwsdklhoiwfm ibbimw}

]yggio Fdod}qeisfm Gf}wysclomi


20/38

Rlslol}f

Ljjlelclg

Iulkqji} db }dki }qimwsdhslk}

]wygfi} fo Qsdhsi}}


21/38

Gvolkfm }qimwsl dbBfs}w Xef}wjis simdsgiglw Ljjlelclg do


22/38

Gvolkfm }qimwsyk dbmedsy} ciwxiio 1/89 log

=/3 `E~ simdsgig lwLjjlelclg do


23/38

Dcnimwfri} db ]djls Imjfq}i mlkqlfho qisfdg>%


24/38

RWU

OXM

NNF=]L

FMREXY

BWL3

GE\HCS

Ljjlelclg

Olfofwlj

RO]

Ljjlelclg %


25/38

Bywysi qjlo}

]djls Imjfq}i Wfki* Jdxis Fdod}qeisi$Klhoiwd}qeisi }wygfi} y}fohIJB$RJB %=1 E~=1 `E~& xlri} %


26/38

l lclg ] wi

Welo` Vdy bds vdys `fog Lwwiowfdo,


27/38


28/38

RJB Qsi}iowlwfdo lw Jfcvl


29/38

Ef}wdsv db RJB }wygfi} fo Fogfl > Ilsjfis xds`* }dki Xef}wjis}* wxii`} log ikf}}fdoiulkqji}* fkqdswlomi db Fogflo }wlwfdo}

Qsi}iow LXI]DKI fo}wljjlwfdo log fkqdswlomi db Olssdxclog glwl %bfs}w }wygv& logsil}do db medd}foh LJG* CEY* OLF/ RB qsdnimw fofwflwig gysfoh 3118 xefme jdx }djlslmwfrfwv qisfdg* hddg wfki wd }wygv |yfwi wfki G sihfdo ofhew wfki ijimwsdo gio}fwvrlsflwfdo}/

Ljjlelclg }wlwfdo* wei kyjwf fo}wsykiow} dc}isrlwdsv xefme f} y}ibyj wd }yqqjikiowdweis glwl db hslrfwv xlri}* qyj}lwfdo glwl log Fdod}dogi wd }wygv B log G sihfdomdyqjfoh %44&

Klfowlfofoh wei RJB }wlwfdo} log }wdslhi }v}wik db eyhi RJB glwl/

Girijdqfoh Klwjlc mdgi} bds rlsfdy} RJB }wygfi}

Olssdxclog glwl i}qimfljjv OXM iwm xefme simifri lw Fogflo }wlwfdo} mdris wei}if}kdjdhfmlj lsil} jf`i Lloglkdo* ]yklwsl log Mefol> qsi }fholwysi} db Ilswe|yl`ilog lov lodkljfi}* oix FFH dc}isrlwdsv byomwfdofoh lw Loglkdo/

]fhofbfmlomi db FFH klhoiwfm glwl bds ]BI iriow} log wei}i ibbimw} mlo ci }iio foOlssdxclog glwl* iuqimwig hddg }djls bjlsi} gysfoh efhe }djls lmwfrfwv qisfdg/

Hidklhoiwfm }wdsk}

]dki wvqfmlj RJB iriow} odwfmig gysfoh 3118 log 3115 %Giwlfj} cv Gs/ Slni}e&

Bywysi qjlo* kiowfdo }djls imjfq}i mlkqlfho gysfoh Nyjv 3116

GE\HCS


30/38

RWU

OXM

NNF=]L

FMREXY

BWL3

GE\HCS

Ljjlelclg

Olfofwlj

RO]

Jfhewofoh gf}melshi} Xef}wjis} IJB$RJB ikf}}fdo} Jfhewofoh fogymig

ijimwsdo qsimfqfwlwfdo %JIQ&

]qsfwi}* Ijri}* Cjyi niw}* iwm ]djls bjlsi} Hidklhoiwfm }wdsk} Ilswe|yl`i qsimys}ds} iwm/


31/38

]dysmi} db IJB $ RJB xlri}

IJB$RJB xlri} el} rlsfdy} Olwyslj log Lswfbfmflj dsfhfo >

Olwyslj }dysmi} db IJB$RJB xlri}>Fomjygi} Jfhewofoh gf}melshi bsdk weyogis }wdsk} * rdjmlofm isyqwfdo} * gy}w

}wdsk log wdsolgdi}* iwm

Klo Klgi ]dysmi} db IJB log RJB Slgfd Xlri}> EB eilwfoh

Bfuig bsi|yiomv RJB wslo}kfwwis} Oymjils iuqjd}fdo}

6Edxiris* do l hjdclj cl}f}* cv bls wei kd}w }fhofbfmlow}dysmi db xlri lw IJB$RJB f} welw hioislwig cv jfhewofohgf}melshi} bsdk weyogis}wdsk}/

Hjdclj Jfhewofoh Bjl}e slwi ~ 91+


32/38

F w g wf


33/38

Fowsdgymwfdo>Wei Ilswe} klhoiwd}qeisi f} mlqlcji db }y}wlfofoh xfgi

rlsfiwv db xlri qeiodkiol/ Wei}i xlri} lsi fkqdswlow qlswjvcimly}i weiv fobjyiomi wei cielrfds db wei klhoiwd}qeisi logqlswjv cimly}i weiv mlo ci y}ig l} lo iuqisfkiowlj wddj wd

fori}wfhlwi wei yqqis lwkd}qeisi/

Doi db wei kd}w xfgijv }wygfig xlri kdgi f} wei xef}wjis

kdgi xlri}/ Wei lfk f} wd y}i wef} l} l gflhod}wfm wddj bds wei}wygv db Ilswe} klhoiwd}qeisi/

Xef}wjis kdgi slgflwfdo mdo}f}w} db ijimwsdklhoiwfm xlri}xed}i yqqis bsi|yiomv mywdbb f} ifweis wei jdmlj ijimwsdoqjl}kl bsi|yiomv %bq& ds hvsdbsi|yiomv %bh&* xefme iris f} ji}}%]wfu*


34/38

RJB sikdwi }io}foh db wei jdxis fdod}qeisi>

]djls bjlsi}

Hflow md}kfm +slv bjlsi}

Jfhewofoh fogymig ijimwsdo qsimfqfwlwfdo %JIQ&

Ibbimw} db jfhewofoh gf}melshi]qsfwi}* ijri}* cjyi niw}* WHB}

]dysmi> Oiycisw W/* ]mfiomi* rdj =11* 311=

]ycfdod}qeisfm RJB dc}isrlwfdo} ljjdx wei kil}ysikiow db wei Gsihfdo db


35/38

]ycfdod}qeisfm RJB dc}isrlwfdo} ljjdx wei kil}ysikiow db wei Gsihfdo dbwei jdxis fdod}qeisi* odskljjv odw lmmi}}fcji xfwe dweis fo}wsykiow}/

Wei lkcfiow ofhewwfki ijimwsdo gio}fwfi} fo Gsihfdo lsi wvqfmljjv < wd


36/38

Wlcji


37/38

]wlwfdo$Mdgi Hidhslqefm

Jlwfwygi

Hidhslqefm

Jdohfwygi

Hidklhoiwfm

Jlwfwygi

Hidklhoiwfm

Jdohfwygi

Gfq/

Jlwfwygi

Wfsyoijrijjf %WFS& 5/8 O 88/5 I 1/


38/38

U3/= ]djls bjlsi %}bi& lw19>39 YW kdgfbfig wei fdod}qeisfmmyssiow log lbbimwig wei klhoiwfm bfijgxfwefo l bix kfoywi}/

Qsioddo \yfiw glv mdogfwfdoqsirlfj} }edxfoh l }wilgv hidklhoiwfmbfijg/

Documents

VLF Research in India and Setup of AWESOME Receivers by B. Veenadhari, et al., Indian Institute of Geomagnetism, Navi Mumbai, India, June 2009