DTIC ADA431369: Spatial Structure of Summertime Ionospheric Plasma Near Magnetic Noon

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Spatial structure of summertime ionospheric plasma near magnetic

noon

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fiudy of the apa een the serine, ple
inaosphriscleton deus eodor enditogs of Lal?
SUMS IM Zo Ube FISCAT Seahan ular eval
gion of nhaneod dose neo umpc ee Dt, we
‘Sropurngratarscan dm dere line, speed
‘scape couued i opine Tis ws wife ate
Uinane nent (TOM halen nose st
nlc eign tat i wn poleward ino the pla 2
Tytheatsnied Hoeft blalovensveon he
"Ta was tooo a longing by bgh-nioe eva: te
eouoon tough obs sein do wis aint Moat
{r8'W sy the poston orgs on the ule ie lh
2 oon a 30°. Cesplemettaryscssremets by #4

thin tomygany te SerDAT try a RAS ste
ito, ogeir wah omparsoos with calor mofo Hark,

evil spp evidence fir de nto the
Gey stctrng ond bie ele a plas co

Sef paces prespinin played outyacoonday ein
‘meen Te ge sri emis emi
palercap.

Key wocds, looseptors_(Fasun_comwection;
Isupete and da Polar icp)

Phca

he gar funmghare i highieatetical im bat
compass clocnen density Sncaueriica ap a wide rng
of hriantal spinal sales CTstaole, 198. The cera
dy ie canned wih dayside Faegion dass rastek
fn Borzoi scales of tee to bundbede of lier ia

Tormpnakac 5B. ry
epsianense

20050405 028°

an

04 Plt 51 Janay 2005,

he renee mm seetar voter conten of Inplane-
lary Magtc ald (AF) BD. OF parler inet
the tngeoanennn (TO, mangporing potion
frou salar latitod ina the pla ep ha meals
(eights densiey wong bx the pr” nod posencen

"he sures oe lage per vem danse Boe een
_vorigaed ding the par event yar, at cay gout
ned teal of pat ra onion ne oo
ions oF BEF x0 hve reteled pais high elotion
ously (ucba eal, 1983, 1988}. Soft gare precipi
Wome sah pole rpinc bute ciel m4 poosibe reree
fur polar fenton, wil os cng te
els hing rast ences ot Bich idee ere
{he Efe of pam is after Tong Frio We tear
Ported ae th plo cp (Weer a 1 ei
anc, ives uggs ha thereay bo icin ina fe
hepa Lsty by buon if sie eomveting un
fabs ane slong Be esp raion for tna f ioe bere
‘cnn asin nt he poe cp, Hee, is uo?
‘idly acrpee dude bak fis oneal aie
Taresp inate en the meer of phrsanicaron emt
lure ni, end ot acc of gti pugiatnn
ths sito ep ate, 1978; Kelly ad Wik
5; 1984; Whoo, 1994). Poser (84) peosonel average
tae caret and Pepa resem dey A FHF
Intnds fon the Chacsila tala, ran of enhanced
_Phooionission wu covered orn the poster ine
Stor near 1g) of Hoy lagna Thi re OF
Dacsauneat suocuent’ foemed a tongue, sal to tha
fest kiealsd hy Stn (1459), tl ws ese co mow
(Oeongh he eles popu ths pole eap wih oa =
rion pneu me ove nsen. Parr ealea adi
‘Seg aber seta td barat agg gh
listioncemestin plowatd tough eft arn ot
pkircap hon (Ft, 1H, ard heron er)
% WE Sint etal: Spat rues of umustme ioocepbeve plana

‘Moro recy linn apc by 2a et
(2009) provera sivimaona evenee Fr te TOL ia he
teupieds aan saci Ras hawogris aging he
fied aide ofennted dest autora ads Ct
sete Suggeod Tim na re of alam ar
slighty poleward af region of gration. fo ths walls
Jnuwedge bere have been no EISCAT obscrations of the
laa ae 1 ns ete

Soveaauoa ase cited posible ena for he
leat uf pshes Bom the coosuens pase seam of
{e TOL Sofa tal (199%) oo th Tz Depeede ton
she Hae TP) sens ho temporal wins
IMF, can enss Ln cating af the TON iy Clos
tunsien wit pai pices (Cotes, 1996), Rodger et
(4939 asx how Fhseloly fw hail even ae
ble to cons envaced ans of plasma vecouioation at
eiay frapment te isto into poche Andezon
fal (198 suggest alan xu Ue hight
tameesti ple inn # region of photieiation a sb.
orl latin, and he subsequent wort, cok
‘Sveroe ah He stponnesin eb pole cap A von
‘iy Lockwood and Carer (1992) supped Uhl be sap:
sinm fhe cumsecon yore cold be onlay pulsed
{dynce magietsuee renin, Mal pal rep
‘en wii be cup way ese contour pte Zaman,
‘lug thea ey suring the sen)
‘eben denen i loon desi Chale ta, (990
Smoih eat, 2000: Nib x al, sued, 2008). The
1 ant yal mada of ole ptthcs Mas he med
kab Sol etal (1941) where plches wer mon ret
‘hang wine oie bebveen 2060-2400 UT. Suboqonk
‘odsling fuvng sie eununs nested the ets
OF IM A, end to oon of he observing ie (Bowins
a, 1985) flue rene sett hal he patho, a
‘eave TOL, wer oat atk brvoon [7:00-2:00 OT hat
‘Bet lect aaa rer ane rn cir bom
MMF 2, 031M aod, Homie aealilotaenteuee
stuly by Pret a 2001 pride engl evidence
Tw the TOL above Srlbnd nex mngete cam in wi,
nd whith gaehelaekgront re cr we cm
‘debit th rei or “700-2200 U4. twas
‘oadly in grin with eran mee at Ny Aes
a eth te pce eteion 9f Cros (1996) oy
‘o-Fldxaobaskg.

exons af depleted 2sgionclocbus density hat bound
the TO) ats pr barre rofored 0 3 igh ltd
eu ronghs (Wala, 199), Them taogheste dicated
in Ue review puper by Rodger ea (782) where tho aks
fof fw mgistion aed safari sr ie 9s
bring important fer tei fxmnon. Val te oi, ei
Tattade wagh Ue as a ears wee mph
ogy QMofet and Csza, 1943), the gatiuds eave
‘eles aad more ellongorae,oving te teas

Tice 6 Re J Co, Ob, Ky Cal Bae
ei al ah ttinte npsntelwn

af chesretons ia ese inbusplae xatons ne of
‘he Ingest abies ans aoverded ding the (aesaooa
‘opis! Year 1959 when vn enlense ery of ona
‘raed Sooner we ed fo OCD aps off? eet wee
lure as. als em heightens te coi
ted by When (194, 1989,“ 983) the heen of
Dhaene oehs in cat to high-latitude nave,

‘Seen (F942 Ue engine ition a rong
Ieaton, eb tthe oat babween the germane
epetinae agen, x which the hig eonwecon
are resis, snd a genarte cape rlem, Se
egal, When (199) propesod ane Deo also

{uF it eplena wher the sanvee amvevive Be ot

eng low esi plas fo oe hse to elas

lt ahs penn, Tee elaoatp

foeen ese density wonghs and He 10! ak Let epi
fay Whalen (1940), who soggesed tnt the esd do

ity of ge of into Hin cemes he TON td
seasonal speatencscaosinco wt esti by sora

i, abd @ sa ice depeice Dal wa enn
‘he onptr om cleenor ie da fs] produto

Sovsal incite ubsration: ave pened
sos of tplend Fsegion cleonon desis usar the aoe
Slo Este experiments the bight og
‘sumed on sowed oomeriap eld Tacs cqutervar of te
convention teresa bounty (CRN) in dee pre-and
oso ine sectors lly and Visio, 1984: Foner and
Doupaie 1884: ester eal, 1989). Timer, he rem by
eral (1957) ggssed uclough high ase
teceg does coe or srwardcnvesting lines fn te
snc Fine sch, teen 200 neous prs 8
{6 CRE and 3042Y olor aera omy nthe pre
ogo timo eck. Rado tomegysphy bas Uns eMail
inl stectue ofthe potnnan Nght rong ner
Git krermtseendions Pre tal, 1998) Cer
{te of tho alain with te Emin be oyna
model AZIM) anggetod det the Cokyh var wnt
‘wih tein ofsunvanl emreetve How ithe pos-anen
fave src. Recta temomphic sis suggest a the
Torenoon mough it percent elare in wine, siding
ately within regime of mrad sr eto he
(Gene, 207 vii palewanl ml hing eves oy st
oor preigttion and he cqurctvan wall woven by
hotlist,

‘he nels potent ia ths. pape fosus othe le
sealo gui stuctarcol he brs rmetae ooo
rude bythe EISCAT Sveftard aa (FSI) ly hate
(re30-890 LIT im 36 Auget 2007, The sremagutic
‘condone doing is prod wee uy ih Ky ane of
11 Anew inpest are Obcrations of cleeuon deity sha,
the TOV sauodel on eiher se by the pre-ond pvenace
Fiptaionte rang, Sianktncoue Shera’ bya
tomaggopiy the Sap A HP ar ond w elie
the Defence Metrooogieal Satelite ogi (OMSP' se
stellt baer eon spp forthe
fem nC ne deny se,
RW Smet al: Spatial est of une anspheric plana n

ACE IMT —

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‘tae (UT)

‘ig. Theos somponin ofc IG asm ts ACR apn opetoae ae lrwinthomes 00D LT O26 Aue

2 Bperinntnabeervtons

2.1 Indemlincy tic Hi

‘The thes camponens of ho IMF ouasared the ACE
“pose Rtn BD 0017 ne sr hoe
fotos af Fig 1 Of paula alee othe ellent dye
Enonegiiw Ry compoceacofbetwera ~Zand 30 éutng
‘ho intel 0800-0829 D1 eumnetouatewicqutial
‘ruenetpaner reennestion, At this tne dor 28 vonk
‘din he B, component far —2 ue +2} with mile
eo crosrgs, ected aprorinacy 07-00 UT. The By
Sanpotcil spi gern xi ate enc sn
round O6S0 UT Thr spacecraft wes posinad pecan of
‘he En othe star nd a appt 240 Ry, here
Se moreated an oxcniny cousin ae wind eo of
Satins 1, Spl ealevltion emi he ave de be
‘oon those abreast he enema nape
arse co bs agprowmtey 67min, wk ore ted
‘Aeon using pcan sitar dnt dete by
Teckwoed otal. (989) mggeting eine day cle to
“in. or the ne sales apeapNe Ws i study a Fe
ay Foe ered

Breron densi at euorl no aub-gnroraJatuder
221 EISCAT Sra dae

“The SCA Seaband sad (782° 16° B, 25.0" Ma.
113" LON) a aperatmy ne NOON UIC apsce po
arunins mode bony etecen 05:30-0930 UI. Ths steer
Sole Tam anion scanned from nonb-o-santh of ail
along the Beal googie mardan eyelet arpenee
Smotly tien mina, Hash reriionn cen mans
238 going decors eosyunding tx uel eps of
‘019° an tide of 300i, The maewrd oer de
ses nd tapers pontine oer >" eons
{oc impor sion e-oiss mt, a shown in Wigs. 2 am
‘Boies the JO e ay path neem or ee
lverdireeezenabownonaBILAT vous MU gut g i
Folly betwee 00 TOD MT in Fig. 4, wth eS
and lac seen abled 20d 2, eigetivly. The atipment of
“tneeeiverlbr sant ayay rom te maguete wing f
doc ths googie sowing epeston he a, T=
ing be nore port of oe aa co hs east ie mage
foe ad the southern ar fe sean ote eg
Inox cca puzning acl (11) MLT 9

‘Tre il bs eco deny soos stay st O65 CY
sa 06:51 UT ict dernven und 20210" 0"?
2. W. Sin is Sal teste onmsphs plan

sme 3 wneT

fe

Fy 2. Buco ene

need the FS igre Wl sn feats BDO UR el progr

Devi earn 300.0 UT on 36 AGU. Wha fame Cah Soa WD abe ais ere

poesard of 0 N (56.0 MT AT) widhincensB els oF
oar 25% 16" a at mre erie of Ue Gel
view hl rion oF enbnace Pegi con nse
ori a Lor lauds wih evident feline estan
Fell eteen 7607-28. 0° (73-15 0P MLA The
og fear iad cam tig 212 UT dhe
abript oppesrance of denso pth of ssana abi al
tes an latades het tren 78.9" SU PN FSS
125° ML AT) asa (03D MILT i Be pro-oen Ee ee
‘ol Gos Mig}. Vis Gokre hes ouxuimn denny of
S510!" ae hgh af sh thle sary
ottimshla deme peotle nea 250i. Tu presse pro
doen a nanos deisky love jue tthe sh some
2.47 tite ie, with pel denty of 5x10" ur
Tos dots patch of phat and nerm dei rh ae
sree a sigh Torr aise ad ales By cs
‘ea ea ua ating (1-72 UT, wih actor dense
Fmd IOF wy pod 210 wr sespcuvely. wey

ino ater ding tae ada sean eaing at 052 UT che
leit bogh ws ima cerabl ro the adn
fnnoaphenc smictae, A reately imo telen a
deny eaten yer the ne anol Hi
view ska ena gsc in Be Fesginn pei isrersiog
Sneha Thi alee meh ae hy the
22a sing 0 12 where lec dense i ce
{10% 10m? yet em orto gh i
‘Fong to sean, Thee ie Sene wed or yp meletoo
(OF this Sand oFbigh denstes on smal sal esl, wt
2 hota poleward geo he Sion 9 ha toate
esau of the Eelkofview. The elevnim densi eo
eae to ete o warty 810m by Bh aad
Inga 08-32 UT, deed analyse asain no sgn
Ses tint srt, Tie rogion of ery gh ca
fis ated aly ‘nt he heap penance oF ado
ey rome meer TPN 675.0" MLAT) ding be sea
(08:32 UY which wl be dacutst a s aterstg, Byte eet
7 Sinn ot st: Spt sete of scans loge pls »

. ane

dn Ba eae

i PS Fa

Jo BS a EE a 3

i Pe fs =
> wow oe won

: , f
| 5 -|

ip Seta nnpctas nena by hb sunspots coon dss pesca 2

scan starting a. €9.13 UF this antantat enon of igh le
‘wen dott eso jromunced pales ode car 725°
[CISS" MLAT) burton thane vs ney i
‘ered (800° F770 MEAT) with poleward all at
doen extn ofthe ldo

Consspouiig mseucucot of he clcowontompcrtue
inieales tba veyan of pecpimton occurs teal bee
{ooR TAD ARON (-75.0" 1507 MEAD tego te
intel af were (Nis:on ot a, 1998) Ths preiptaea
este clon exhibit iby eh oc o
rapnids, goto becoming Latiadially zon6o4 wk
time, Ths hrf te OAK corto beer he rat
fabighll-earscan ht deveaves Nom around 20" 1 LO"
{olitindinaloenteten nine ef €Ckm. 4 sepnme eat
in omeried aving the sean sng a¢ ORD Ue wha
region oF eae feomenteaptnoace ope thigh
‘ide ett ub evi WH By sgh tasty
‘weak iia lew)? ste: fom de sof pripeain
Te ot vay hm rye of reine the let

Aermpraur ae generally cota wie Lt repent
‘bedgreuad Tees, There howeve,wrrsion of entonsed
clove femporatucs dung (bs Raa sna t OB VT fo
the nother e-cvew tt evs cap sacred
(fgoucar 10.020." MLAT)

Je light oft ckewon temperate reise, and
tein in estan rr pect oe Ti) Ss est
thor tho dense patch of pasa cbse ct 13 UT i te
pronoon sectors oe beng protcedi-itby a par
{le prcinien athe Une of aera, bu coped
‘eld sol-prodaccd onnmiog tht ht cemootd a te
falar he Thi lease fh rnd Oy the igh
Shinde of the eohanceseat andi etl aap btn
Bide profile, wilh plan ining recombine oe Tower
des box smabing at high aids wher hs ne
fe ongee The agpeinse of he dene: pte of pam in
{hc ESR Asleceview oinldes with Wake gave
By compen the BT Th ony mothe nt ein
‘fsa alan, of TOT, ja the paar ap Seely,
RW

4 hin cde ays on LAL
cess nsisaemc belbecea VOD MEE
Site ndeing te rig pian fe ad at
Gra ena tea weasel ner
SRG ioc ong WT O56 Ps 1 pee he
doris de doy sec dea te ween
Zot blck ns, wah the Wack aac ahs gro-ac ext of
tase vieconl Merton speaent ounce
wot capa guna mao ee,
Shenae

1934). The agpeuance oa ath produced ation dot
‘iy wong ih verte i evence or
fsced heal sombiaton i exon hs oo
lerpsre na shown. 8 er es eee 760P=
TRON (-73 0-150" MAT) arc cleewon dost
sehen places by oltre prem
‘raion ite the mem set aka daring the
seh nso seri 38 U2 UR, wee Beil
fstatded rio of tigher sean dani ara cverse
‘eel ures “ke ft-ofvien Thi cm poe be
inn Sore hes fae UN matin eh
der appoaca lea gcatgbis noo (ce Fig 4), but Oe
Tack any vpn isolator de
shy angen cha este te TOL co magne on o>
bi, The ereing pe teigl wa culm Devoted
to both de geotel eect of teeing ela th
de wh ine, oe pla receminain eae eer
‘Mids th oct i est it ae ola ep ofc
the TL the role eat recipient
‘ho slseon dens at leer ltd apcar o be aving
bonlca wannlany lic he deny screed
ie mpepnionan ssk luge ha ground dey een

Sime al: Splat armel ones pla

Besa Deny

“emi inte ere

eto em

‘Gourmet epee

; fe

Fig & Tapers ips fh pi iret of tan
seni diag Live lie Soin ae oF SN
G16 tua ul, OF UF eu ate RT
overpne pal ana osonofPeiger aot nd,

seamorine. Th oly anoualy the waked owl vou
sheered daring he sean sprig a O87 UT evi 19
‘a anecnod with weak tendo MMF, Lhis ef
heed Fhe nthe denon, The Maosag Eom
‘henaon tobe pestnean ssi sided By te atares
‘ronounce pane age fhe TOT nthe an cing at
618 UT wih a does ugh ate Digest
1B, Sim tals Spl ast omen aos pla a

aboncd ccoren tempeznes within this noagh oe oon
wiser wilh ne ape dren i leon lag
Jn gions of depleted closron deo (Banks wed Keto,
‘cationic Prey Nes nk, 1973}.

Seppo Iran fee the lanl sscibaon ot
leetton densi ia provided By the ra trgtghy ex
Drcmien erate Yy the Ulver
rjc, 2003, The tomesaphy cxpsinmt compris +
than furnaces n Newt Senet al tu
plscocohsreat sigs fo ho pola siigg eis ihe
avy lononpltls Monit Syaa (SIMSI, pteiouly
leas 2 the Navy Navigaions Salss Syren (SNS),
Aiuto ie eure abl electron some
‘lege mune oficecting ato oes ea pat,
Teves of Phe dls Pe artim of ee An
iy over a astillooal sea of pou esoapre (Ce
xamgle Weller et a, (898), Tex slit passes ter.
feotd IS 8 at O70 UE 02:56 UE and 0212 UT and
The stata kt dest ane san ine es
once of Fig, 5. The 200éon my-ph fteneon for
Ure lie pes ae hon nage
Fig. 4 The fst comepphi img esresponding 1 ce
‘elite pate a 8726 1 sgn in the pe lf
Fig 5. The omozmpbic inuse shows th aati Sib
tin of lan deaty i tha pre-nn de snr os
‘epenen DRD-]EG MIT (oe Pig) deny rong
‘wile a tia dea of 13x10!" 0™ i cote at
FRO (80 RIVA) wih ral ren if enhanced
cen dennis ot Jv sea, Te the nor oF
Ieguh pl pln betwen 77.56 (795.5°
783" MEAT) wth a asian dove of 60x10"
‘The second iesogrplic nage corepanding to heart
su pases 56 UE Hester cle part F383
‘oe wsccemphis age shows the spl dzeuton of|
loca cou In th agate oan ses berseca 10
TRAD MIUT foe Fig 4). A tread regen o sake elecron
eats cen i Jov-tobigh tie slong hs eg
‘eure vida the TOL ia aba ding I Ded cme
rae ce 526 UT, she pe eres tech
Soxl0"' mle ane of i, with hi of deca
ing densest he note see of eae,
‘Comparison wit ESR. becrstions egg a the pe
ial deh images hy tray bec wile
tustionbetasen he pre- ad poseoon tno sear Tbe
[preroor. dexy meng and deaso pach bersoca 77.5"
SLO'N (785-7837 MILA dain the ate pss at
(OF 36 UT ia wey soar to thar obecved by he ESR ia
oth the rar sce nig 312 DT and 0792 LI
Tee obecrston of tho TO! ia tho aoon str in het
rmoanshie ase a O56 UT and (826 UT is emer
‘wh erteapendiag BSW obervains inthis at 0782 Dt
nd 08:12 UT tespectndy The decomsing densi thi
sing hell Dc een th bap

rma a 0826 U1 itn agree wil he light depletion
sbeerved ac tenner extant e ESR van sig et
(O12 hic edge lc tnt prmounoo dang x ter
ESR asad stutog st OP 18 UF, whewe a desis ough
very high aids snag ama tron a
rontneon tn estar. Tho sbssiot dense easel iy
formotaphy rein good ure wth ESR eterna
‘sing esata of an alight peak eight mt
so-well prod, becoan prosesvelydipaced ina
"late i crag o WSR obits. The dence
indi ede ietaatd othe incoupletecersiae ge
fey ofteaoglapy Ua alee cua nfries so
‘he vesil pre of the fois dsetbaion, Wada his
sete tration br mr teri et pe
fsounced effec ee fre vn heron owt,
Such he acon nage Crees, 198)

2:4‘ plas My

23. SopeDARNHE radars
Oberainaehy ce SoperDAIN na nf 1 ris Me
bea od extant global hight coxtenon ga
(orm derghoal the iar uf inter (Geen ef ty
$900). Lincofsghtveocsy ueatueumeats wate wed
cpedrin IM k-depentanl erp convestign adele
‘ot atiticlydatvd eoneaien prem by Racha
rd Creenal 1998), lo ono te es pe
‘cute (Rasbeniead ond Gomes, 1998) Seed cu
Dube ate seve er ig 6 J out Li parecer te
{tonsiba bate hep nt pstnona tne soto
"cd by tho ESR Thete pots were closen whore hes was
sntvieatbuchiter within the Slbard rein, sous
this seas ot posible fords fel pod bate (9-10
(9:12 Ut The eric tenis hae been od on +
MLAT visio MET por, equivalent otha shown a
ge A, wih ngewe fe psf each aug The
loondiaa of zen od erten of ft ESR sane corepceding
vo each Supt shown othe Date hy the ed marker and
be tne, especies

‘Olas in tho exsat stad clear boat Sunn
tim pall Uf cosine th te pertinent IRAP cond
ties (Comey, 1998). The weak wend ihe H, compoucnt
how aly dn Be eocady eet By Ho
trolacing aye te the Season pte Ch
fn Loetwnod, (990. 4 ebe Begouing of the inst of
fate he By enol f neaie an haere eon
BS exposed fo te red toads cade iLTs. 1h sab
ered th the nnigut wt Vt O62 UT, wha He ia
sues of 6WDum! as ited lads th ews
tor Ae he component woskrar nd ngucoee ae ths
‘avon ats hase rch vane apelin around
Tanwetic noon. Ths ebseevod dag he ort apa
(8:10 Bk Di; where News cme SK 4
‘ected along tht san dni meviia, Subecquety he
2B nmneal Steer wry pose ech ond Ee
iv sotion eke sp eet er Mae Ty
2 WSs al: Spatial traci ofsuneatine iecpheri pea,

9) 0640-06027 1), 0810-08120

©, 0830-0832 1), 0910-09120

i W

6 sees oa oon mids mtn fh cy mest ra Sipe ATON HE fe: dy ert

serra drags ind ouput a 80-08-92 UT andthe In emerge pla cap a6 4101 The nara ety rong
Gath olga (9:19 DT UT bet eho es aeat- a aig Jwer nad lo appear to dso aia
ten here Bowe i ees of A0ane weed uo Ihe wack ometing Geld Hes, ae he seciged eetod
peonon tect Senate fe oh ae broadly nine: il eels
‘fie preneuneomeectoncel, Ae the ESR increas ©

rng tft ouput between 60-0642 UT dc FS__angetie oom toe OF D-D982 LF te er hm he
fs loated 10 the wes a he expecta lori of ie TOL, —pamevalignel enemy log he noc digt mas
‘beri cbaees th pati ditbton of efceram dons ian Matta Ue EM Io the AC spare
inthe pono thre ecu. Chmprion wh te ccc craft inh pred woes hat Be sonnet not
‘ery weal napa oe Wg, Argionofhigh eton

‘enutos patho ex tain ange esc dg
‘hie me pein! ha of npr on cg he TOL Tho
TW inset Spat stmt of meri inomphi aa a

26 Aug 2000

ceageertct EE

ig. 7 ston eames ss (gyro pec) he ec poole on a pod i ep
THEDAI Psat Homeen 58 GHED TCE, The erent eon pn sm tn he etn pecs ae ye

B, compment subsea becomes pose, and heer
tela overdo otic oar MTs daing he cogs
C0830 (32 UV and Gye 9:12 UY. Dar the falar
‘Spur the ESR. ade sce Bc the poseoene Uae
Del where the TON cee a exn to .5°1 h
‘enn ong outed farther orth, Cseeion th hs
‘dene wi pax, wslFsie th pom-ngn conection c=
sence cirmen a an ey hr the
Tino gb othe ESR rar bovm (oc wal Fagor
‘he Une ster ace eon wilh SupetDARN oh
2.52 Delis Vemma Salty Progr
Furies xperinansl sopart Zor te eezued ex
ion pater se provided by messaremen sods ty’ ee
FIG auells of ths Defines Molorvinga Stell Ps
pomrse GIG), The evel lowed a eset ce
AooneatUsjetoly arom to dagsidelamnahere ern
smneroie nove ofr 754° NLAT ot 06:35 CT, OF pur
1 rot the pre sn mn ths sell pens
fn sown in mugoot co-sednnte im Pig. 4 by te hos
“uta Bc lies Mesuneels cf Bert tack bar
Zen component of fon 4 aloug he alte ajay
Be slr te einer panel of Fg. 7 The nape va
tus Botmsen 06:55-0648 LT ladles da an anus
ow component ic messed Ihe see pase Lem

he no a he pre ine ae say eae 758°
‘T82° MLA sa 1230-0934 MT, conse WD Swpee-
[DARN ubetean Pi. 6a At bray weahorng ofthe
aniayowaedcougenent i obeec=d neat 73.2" MUAT wil
fice lacs seas, Ki hustle thal he
trop weakening of how mn bave oad sot
Tce alectey and wih the isla of plana Mw te
pewisteor of te ly tle toner has fs ec to
Seawind tht Ue satel ove oul of Ue high

Complencusry mcarrements of Ge sIsetos aud i
spectra then ithe rp tse panels of Pig, 7 chow
sduractrsies ef eosp precpiotin (evel and nen,
AK} ton wyan nf 1? Vu leven oer oF
0 eV otourtetvoen 42°78 7 MLA witha areal
(OF om ispecran. TBoepeecpttion, echadod with 2
elon of tsunvard plasoe few, provides evidence fo
Frarnelopie remem ting IMF 2 condone
‘Plow and Meus, 181. 1995). The exe of tes dee
Sim slay hn hy the wile male, ested opp
‘tow sulite modo, supsingossd on De aa e

tery ius, 4nd above be eleron sper pel oF 1

the beso he wings usar 3. WILAL and 9:58 Wit
Fedints de ection of dopant of eV seeto0s aed
aneriard cdg of enrages an pespitb, where
5965 of x iglo net 752° MEAT and 1130 ML al

‘ales the ete the ener ll le eign