中低緯度地區使用雷達觀測 E層場列小尺度不規則體，經常都會伴隨層狀離子層結 構出現，由於它可以提供必要的電子密度梯度及局部極化電場，產生梯度飄移不穩定 使不規則體成長，再經由非線性的分段碎裂過程形成小尺度不規則體。學者研究結果 普遍認為，潮汐產生的風切造成金屬離子聚集是散塊 E離子密度累加的最可能原因。 本計畫將統計過去幾年 52M 雷達偵測資料，在有雷達回波的時段，比對 atmPhs 50Hz 的福爾摩沙衛星 3 號資料，同時國家通訊委員會位於崙坪的電離層圖，可以提供長時 間電離層背景訊息。此外 HWM07 水平風場及MSIS 模型可以提供潮汐風場的電離層 E 域背景參數，將有助於探討中壢地區散塊 E層，層狀結構場列不規則體回波機制。 In low and mid-latitude itself it is becoming clear that the observation of m-size irregularities with radars is associated with the presence of sporadic Es layers that provide the necessary gradients and localized electric fields to exited gradient-drift instabilities. The small scale plasma irregularities have been assumed to come from a nonlinear cascading process. The results of researchers have provided a unified picture of sporadic E layers that are formed by tidal-driven wind shears that the compress metallic ions into thin layers. In this proposal simultaneous observed Chung-Li 52 MHz echoes and COSIC 50Hz sampling radio occultation data will be used to study the mechanism of forming Es layer. Besides these the ionograms that provide by NCC (National Communications Commission) can provide the long term ionospheric background information. Also, the HWM07 and MSIS model will be associated to study the mechanisms of forming sporadic E layers.
