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Comparison of E‐region electric fields observed with a sounding rocket and a Doppler radar in the Seek Campaign
Author(s) -
Yamamoto Mamoru,
Itsuki Tetsuya,
Kishimoto Takeshi,
Tsunoda Roland T.,
Pfaff Robert F.,
Fukao Shoichiro
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/98gl01055
Subject(s) - sounding rocket , sporadic e propagation , electric field , doppler effect , depth sounding , radar , rocket (weapon) , doppler radar , polarization (electrochemistry) , geophysics , ionosphere , geology , physics , meteorology , remote sensing , geodesy , geography , aerospace engineering , astronomy , oceanography , chemistry , archaeology , quantum mechanics , engineering
This paper describes results from simultaneous measurements of mid‐latitude irregularities by a sounding rocket and a Doppler radar. The experiment was conducted on August 26, 1996 as part of the SEEK (Sporadic‐ E Experiment over Kyushu) campaign in Japan. Electric field observed with a double‐probe sensor on the rocket showed very large fluctuations of ±10 mV/m where irregularity echoes were quite intense. Doppler velocities observed with the radar agreed well with the electric fields. We estimated growth rates of the gradient‐drift instability, which showed positive values around the major sporadic‐ E layer. It was found that, within intense irregularity region with quasi‐periodic structures, there were large polarization electric fields that was likely to be associated with spatial structure of the sporadic‐ E layer.