由於在2009年完成中壢30MHz與52MHz特高頻雷達同步觀測的系統設定，藉由此機會可同時使用30MHz及52MHz特高頻雷達觀測散塊E層5公尺及3公尺場沿不規則體。同時觀測的資料從2009年7月18日至26日，但本文處理及使用資料是從7月24至26日，針對3公尺或5公尺不規則體的回波頻譜特性或三維定位結果進行分析與統計。
同時觀測的結果，3公尺與5公尺回波頻譜特性為平均都普勒速度小且頻譜寬大的TypeII不規則體。3公尺的都普勒頻移(Hz)大於5公尺結構。3公尺與5公尺結構的都普勒速度大小是相近，可是隨高度增加時，速度變化趨勢相似，但3公尺速度比5公尺速度略大。三維定位結果，3公尺與5公尺結構大部分分佈於52MHz波束主軸的西邊，受到發射功率與天線面積等影響，在高度較高處，觀測到3公尺比5公尺結構的機率較大。3公尺與5公尺團狀結構的追蹤速度(Trace velocity)方向相同且速度接近。

With newly established capability of simultaneous ionosphere measurement made with, a coordinated campaign of simultaneously measuring 5-m and 3-m scale in sporadic E (Es) region was made field-aligned irregularities (FAI). We use interferometer technique to locate three dimensional position s and structures of 3-m and 5-m irregularities in respective echoing regions. The echo power, mean Doppler velocity and spectrum width of the radar returns are also analyzed. It shows that the Doppler shift in unit Hz of 3-m structure is slightly larger than 5-m structure, and they are very close in unit of m/s. Interferometer result of three dimensional measurements show that the echoing regions of the 3-m and 5-m FAIs are not coincident with each other. The former are about 5km meat from the latter, which is consistent with the separation of the expected echoing regions between 30MHz and 52MHz radars. The trace velocities of 3-m and 5-m blob structures are also analyzed and the result shows that they are generally consistent with each other.

Chu, Y.‐H., and C.‐Y. Wang, Interferometry observations of three‐dimensional spatial structures of sporadic E irregularities using the Chung‐Li VHF radar, Radio Sci., 32, 817-832, 1997.
Chu, Y.‐H., and C.‐Y. Wang, Interferometry investigations of VHF backscatter from plasma irregularity patches in the nighttime E region using the Chung‐Li radar, J. Geophys. Res., 104, 2621-2631, 1999.
Chu , Y.-H. and C.-Y. Wang , Plasma structures of 3-meter type 1 and type 2 irregularities in nighttime midlatitude sporadic E region, J. Geophys. Res., 107, 1447, 1182 ,2002.
Chu , Y.-H. and C.-Y. Wang, Three-dimensional spatial structures of midlatitude type 1 Es irregularities, J. Geophys. Res., 107, 1182, 2002.
de Paula , E. R. and D. L. Hysell, The São Luís 30 MHz coherent scatter ionospheric radar: System description and initial results, Radio Sci., 39, RS1014, 2004.
Farley, D. T., H. M. Ierkic, and Fejer. B. G., Radar interferometry: A new technique for studying plasma turbulence in ionosphere, J. Geophys. Res., 86, 1476, 1981.
Fejer B. G., D. T. Farley, B. B. Balsley, and R. F. Woodman, Vertical Structure of the VHF Backscattering Region in the Equatorial Electrojet and the Gradient Drift Instability, J. Geophys. Res., 80, 1313-1324, 1975.
Fejer, B. G. and M. C. Kelley, Ionospheric irregularities, Rev. Geophys., 18, 401-454, 1980.
Haldoupis, C., K. Schlegel, and D. T. Farley, An explanation for type 1 radar echoes from the midlatitude E‐region ionosphere, Geophys. Res. Lett., 23, 97-100, 1996.
Haldoupis, C., K. Schlegel, and D. T. Farley, An explanation for type 1 radar echoes from the midlatitude E‐region ionosphere, Geophys. Res. Lett., 23, 97-100, 1996.
Haldoupis, C., A. Bourdillon, J. Delloue, and G. Hussey, Wavelength dependence of Doppler spectrum broadening in midlatitude E region coherent backscatter, J. Geophys. Res., 103, 11605-11615, 1998.
Hysell, D. L., and J. D. Burcham, The 30‐MHz radar interferometer studies of midlatitude E region irregularities, J. Geophys. Res., 105, 12797-
12812, 2000.
Kelley, M. C.: The earth’s ionosphere, Academic Press, London, 1989.
Rogister A. and N. D’Angelo, Type II Irregularities in the Equatorial Electrojet, J. Geophys. Res., 75, 3879-3887, 1970.
Sudan, R., J. Akinrimisi, and D. Farley, Generation of Small‐Scale Irregularities in the Equatorial Electrojet, J. Geophys. Res., 78, 240-248, 1973.
朱延祥, MST雷達回波機制的研究, 博士論文, 國立中央大學大氣物理研究所, 1988.
王建亞, 利用中壢VHF雷達進行電離層散塊E層不規則體之觀測, 國立中央大學太空科學研究所, 博士論文, 1999.
陳祥章, 中壢雷達三維輻射場型模擬與分析及系統建立, 國立中央大學太空科學研究所, 碩士論文, 2005.
楊國峰,電離層散塊E層不規則體結構與特性之研究, 國立中央大學太空科學研究所, 博士論文, 2008.
吳俊賢, 利用中壢30MHz雷達進行中壢地區日間場沿不規則體的研究, 國立中央大學太空科學研究所, 碩士論文, 2008.