TY - JOUR
T1 - E-region irregularity observed by the tanegashima frequency agile radar during seek-2 campaign
AU - Brahmanandam, P. S.
AU - Pan, C. J.
AU - Lee, C. C.
AU - Tsai, W. C.
PY - 2009
Y1 - 2009
N2 - The present paper reports the nighttime field-aligned plasma irregularity (FAI) at 6.1 m in E-region during SEEK-2 (Sporadic E Experiment over Kyushu) campaign during July-August 2002 using Tanegashima (30.75°N, 131.03°E, geomagnetic 20.970N, dip 43.20N) Frequency Agile Radar (FAR) operated at 24.515 MHz. According to the characteristics of radar echo, the echoes are classified into four types: negative quasi-periodic (NQP) echo; positive quasi-periodic (PQP) echo; continuous echo; and undefined echo. A study shows that FAI appear generally at 80-110 km altitudes during 1800-0400 hrs LT, and FAI occur most frequently at 2200 hrs LT. Further, among the four different echo types, the occurrence probability of NQP is greater than other types.
AB - The present paper reports the nighttime field-aligned plasma irregularity (FAI) at 6.1 m in E-region during SEEK-2 (Sporadic E Experiment over Kyushu) campaign during July-August 2002 using Tanegashima (30.75°N, 131.03°E, geomagnetic 20.970N, dip 43.20N) Frequency Agile Radar (FAR) operated at 24.515 MHz. According to the characteristics of radar echo, the echoes are classified into four types: negative quasi-periodic (NQP) echo; positive quasi-periodic (PQP) echo; continuous echo; and undefined echo. A study shows that FAI appear generally at 80-110 km altitudes during 1800-0400 hrs LT, and FAI occur most frequently at 2200 hrs LT. Further, among the four different echo types, the occurrence probability of NQP is greater than other types.
KW - Field aligned irregularities
KW - Ionospheric irregularities
KW - Mid-latitude ionosphere
KW - Quasi-periodic echoes
UR - http://www.scopus.com/inward/record.url?scp=84873192517&partnerID=8YFLogxK
M3 - 期刊論文
AN - SCOPUS:84873192517
SN - 0367-8393
VL - 38
SP - 42
EP - 49
JO - Indian Journal of Radio and Space Physics
JF - Indian Journal of Radio and Space Physics
IS - 1
ER -