The observations of F-region irregularities in association with ionospheric bubble made with the Chung-Li VHF radar

Conference · Sun Aug 01 04:00:00 EDT 1993

OSTI ID:188461

Chen, Y H; Chu, Y H; Liu, C H; Chao, J K

The intense radar echoes coming from F-region irregularities were observed by using the Chung-Li VHF radar on March 25-26, 1993, 1739 LT approximately 0130 LT. It indicates that the radar returns occurred from the altitude of 230 km to about 430 km and centered in the height range of 260 km approximately 300 km. Fine structures with scales of about 2 approximately 3 km can be found in the height distribution of the backscatter of the irregularities. Examining the evolution of the echo intensity reveals that these small scale irregularities seem to be generated from the large scale structures through the turbulent cascading process. In association with the occurrence of the VHF backscatter, the ionospheric bubble scaled from the TEC records and from the GOES 3 satellite, and the range spread F appearing on the ionogram are both observed simultaneously at the Lunping Observatory. By using the method of similar fade, the drift of the bubble can be deduced. It shows that the drift is toward northwest with a speed of 123 m/s.

• Research Organization: National Central Univ., Chung Li (Taiwan, Province of China)
• OSTI ID: 188461
• Report Number(s): CONF-9308284--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
F REGION
FLUCTUATIONS
IONOSPHERE
RADAR
REMOTE SENSING
SPREAD F