Observation of Low Latitude Ionosphere by the Impedance Probe on Board the Hinotori Satellite
Observation of Low Latitude Ionosphere by the Impedance Probe on Board the Hinotori Satellite
复制标题
DOI：
10.5636/jgg.38.111
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
H. Oya;Tadatoshi Takahashi;S. Watanabe
中科院分区：
文献类型：
--
作者：
H. Oya;Tadatoshi Takahashi;S. Watanabe
用1981年2月21日发射的Hinotori卫星上的阻抗探头(IMP)进入倾角为31°、高度几乎为650公里的半赤道轨道，获得了1500多个轨道上的电子密度分布数据，误差小于±3%。探测到的电子密度分布包含赤道等离子体气泡的数据。对发生频率的初步统计研究表明，至少存在三种类型的等离子体气泡。属于第一种类型的等离子体气泡主要从傍晚到午夜生长，电子密度的耗尽率很大；因为耗尽区是按顺序排列的，所以这里称之为多个等离子体气泡(MPB)。第二类等离子体泡主要在午夜以后增强，即使在日照条件下也是如此，具有周期性特征，这里称为准周期等离子体泡(QPB)。还有第三种类型的等离子体泡，以其孤立特征为特征，在这里称为孤立等离子体泡(SPB)。SPB现象发生在整个夜间时段。在靠近等离子体泡发生区边缘的电离层上侧区域，经常出现电子密度增强，与背景电子密度的偏差只有几个百分点。这些新发现的现象在这里被称为等离子体斑点。文中还讨论了等离子体斑点的产生特征。
By the impedance probe (IMP) on board the Hinotori satellite, that was launched on February 21, 1981, into the semi-equatorial orbit with inclination of 31° and nearly constant altitude of 650km, data of electron density profiles along more than 1500 orbits have been obtained with an error less than ±3%. The detected profiles of electron density contain the data of the equatorial plasma bubbles. Preliminary statistic studies on the occurrence frequency indicate that there are at least three types of the plasma bubbles. The plasma bubbles that belong to the first type grow mainly from the evening to the midnight period with large depletion rates of electron density; since the depletion regions are sequencially aligned those are called here multiple plasma bubbles (MPB). The second type plasma bubbles are enhanced mainly after midnight, even in sunlit condition, with periodic features and are called here quasi periodic plasma bubbles (QPB). There is a third type of plasma bubble characterized by its solitary features called here solitary plasma bubble (SPB). The SPB phenomena takes place in all of the night time period. In the topside region of the ionosphere near the edge of the occurrence region of the plasma bubble, there frequently appear electron density enhancements with deviation of a few percent to the background electron density. These newly discovered phenomena are called here plasma blob. Occurrence characteristics of the plasma blob are also discussed.