Abstract
Abstract. According to the sounding rocket experiment conducted at Hainan ionospheric observatory (19.5° N, 109.1° E), a valley between the E layer and F layer in the ionospheric electron density profile is observed and presented. The sounding rocket was launched in the morning (06:15 LT) on 7 May 2011, and the observed electron density profile outside the valley agrees with the simultaneous observation by the DPS-4 digisonde at the same station. The width of the observed valley was about 42 km, the depth almost 50%, and the altitude of the electron density minimum 123.5 km. This is the first observation of the E–F valley in the low-latitude region in the East Asian sector. The results are also compared with models, and the physical mechanism of the observed valley is discussed in this paper.
Highlights
Aalr.e(c1i9b9o0(,181.939◦4DN),as6tut6ad.7ie◦SdWyth)seftrevoammria1st9io7n4 with a reduced electron density between the E and F layer of the valley parameters with local time and soDliasrcuzsesnioitnhsaniamennaerdtlahyneTsaiitsothonienorpsitdpehgrhefeeo1,rri9m1c59e07lisen7,c)J.tsraioStcunkosudmonenednais(ns1itug9yr5Merp4mor)cooekrfineedltptesseo(orEpltfer–DodGFtvhteivehedaevevloleeaetsxlhylliee;ocsyLtie.poeonnAmbcnlbyesteifnictgq2aclu0eti0e.r3reBi)ss.etoAiincmssge.waHmerooekwmdneeoolvwitene,rg,mthioneefatitshohuMeneroeElomsopwaedhn-nedletar,evtltiahthuDleGaldesbeyeseartrvcreeokoggesnsiicoolgaocnnDtrsitpeieesng(rcmTinuEorisetnatehssisaiuefotlnilrnAtccisstdhsgraieear-, of depleted electron density regions in the ionosphere us- there are no E–F valley measurements with sounding rocket ing the data from Viking 5 and Aerobee-Hi NRL-50 rock- or ISR being reported
Shi et al.: Ionospheric E–F valley observed by a sounding rocket at the low-latitude station Hainan detailed parameters such as depth and height of the valley bottom (Denisenko and Sotsky, 1978; Mahajan et al, 1997)
A sounding rocket was launched in the morning (06:15 LT) of 7 May 2011 at Hainan ionospheric observatory (19.5◦ N, 109.1◦ E) to measure the ionospheric electron density profile with a Langmuir probe
Summary
Aalr.e(c1i9b9o0(,181.939◦4DN) ,as6tut6ad.7ie◦SdWyth)seftrevoammria1st9io7n4 with a reduced electron density between the E and F layer of the valley parameters with local time and soDliasrcuzsesnioitnhsaniamennaerdtlahyneTsaiitsothonienorpsitdpehgrhefeeo1,rri9m1c59e07lisen7,c)J.tsraioStcunkosudmonenednais(ns1itug9yr5Merp4mor)cooekrfineedltptesseo(orEpltfer–DodGFtvhteivehedaevevloleeaetsxlhylliee;ocsyLtie.poeonnAmbcnlbyesteifnictgq2aclu0eti0e.r3reBi)ss.etoAiincmssge.waHmerooekwmdneeoolvwitene,rg,mthioneefatitshohuMeneroeElomsopwaedhn-nedletar,evtltiahthuDleGaldesbeyeseartrvcreeokoggesnsiicoolgaocnnDtrsitpeieesng(rcmTinuEorisetnatehssisaiuefotlnilrnAtccisstdhsgraieear--,, of depleted electron density regions in the ionosphere us- there are no E–F valley measurements with sounding rocket ing the data from Viking 5 and Aerobee-Hi NRL-50 rock- or ISR being reported. Ing rockets launched from Huancayo (I1n21◦E9S6,a57,r8stih◦xWsSo)uynosdb--temuspsehderitco dEe–tFermvainlleeyt,hebuotccthueryrenccaennaonEtdableorctuahstieoSdn ytoosf stthheeomwionthoeserved ionospheric E–F valleys at daytime and nSigchtiteimneces. Shi et al.: Ionospheric E–F valley observed by a sounding rocket at the low-latitude station Hainan. Detailed parameters such as depth and height of the valley bottom (Denisenko and Sotsky, 1978; Mahajan et al, 1997). In this paper, using the data from the first observation of the E–F valley in the low-latitude region of the East Asian sector, an E–F valley is presented and the valley parameters are given.
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