scholarly journals VHF radar observations of nighttime F-region field-aligned irregularities over Kototabang, Indonesia

2009 ◽  
Vol 61 (4) ◽  
pp. 431-437 ◽  
Author(s):  
Y. Otsuka ◽  
T. Ogawa ◽  
Effendy
Keyword(s):  
Vhf Radar ◽  
Radar Observations ◽  
F Region ◽  
Field Aligned Irregularities

First VHF radar observations of tropical latitude E-region field aligned irregularities

1996 ◽  
Vol 23 (25) ◽  
pp. 3683-3686 ◽  
Author(s):  
R. K. Choudhary ◽  
K. K. Mahajan ◽  
Sachchidanand Singh ◽  
Keshav Kumar ◽  
V. K. Anandan
Keyword(s):  
Vhf Radar ◽  
Radar Observations ◽  
Tropical Latitude ◽  
E Region ◽  
Field Aligned Irregularities

scholarly journals Characteristics of the E- and F-region field-aligned irregularities in middle latitudes: Initial results obtained from the Daejeon 40.8 MHz VHF radar in South Korea

2014 ◽  
Vol 31 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Young-Sil Kwak ◽  
Tae-Yong Yang ◽  
Hoysub Kil ◽  
Devulapalli Venkata Phanikumar ◽  
Bok-Haeng Heo ◽  
...  
Keyword(s):  
South Korea ◽  
Vhf Radar ◽  
Middle Latitudes ◽  
F Region ◽  
Initial Results ◽  
Field Aligned Irregularities

First VHF radar observation of midlatitude F-region field-aligned irregularities

1988 ◽  
Vol 15 (8) ◽  
pp. 768-771 ◽  
Author(s):  
S. Fukao ◽  
J. P. McClure ◽  
A. Ito ◽  
T. Sato ◽  
I. Kimura ◽  
...  
Keyword(s):  
Radar Observation ◽  
Vhf Radar ◽  
F Region ◽  
Field Aligned Irregularities

scholarly journals Statistical characteristics of low-latitude ionospheric field-aligned irregularities obtained with the Piura VHF radar

2002 ◽  
Vol 20 (8) ◽  
pp. 1203-1212 ◽  
Author(s):  
J. L. Chau ◽  
R. F. Woodman ◽  
L. A. Flores
Keyword(s):  
Signal To Noise Ratio ◽  
Equatorial Electrojet ◽  
Meridional Wind ◽  
Statistical Characteristics ◽  
Doppler Velocity ◽  
Vhf Radar ◽  
F Region ◽  
Seasonal Characteristics ◽  
E Region ◽  
Field Aligned Irregularities

Abstract. We present a summary of the statistical characteristics of echoes from ionospheric (E- and F-region) field-aligned irregularities obtained with the Piura VHF radar. This radar is located at ~ 7.0° dip latitude, just outside the equatorial electrojet (EEJ) region. Our results are based on (1) intermittent observations made between 1991 and 1999 just few days a year, and (2) continuous observations made between January 2000 and June 2001. During most of the intermittent observations, simultaneous measurements of EEJ and equatorial spread F (ESF) irregularities were performed with the Jicamarca VHF radar. From the continuous measurements, we have obtained the diurnal and seasonal characteristics of a variety of parameters (percentage of occurrence, signal-to-noise ratio and/or Doppler velocities) from the lower and upper E-region irregularities and also from F-region irregularities over Piura. For example, we have found that (1) the E-region echoes are stronger and occur more frequently during local summer (i.e. between December and March); (2) between May and June, the E-region echoes are weaker and occur less frequently; moreover, during these months, a semidiurnal wave with large amplitudes is observed in the meridional wind (> 100 ms- 1); (3) there is vertical wavelength of about 20 km in the Doppler velocity, particularly after midnight; (4) the lower (upper) E-region Doppler velocities are influenced mainly by meridional winds (equatorial F-region vertical drifts). In addition, we have observed that the seasonal and daily occurrences of Piura F-region irregularities are similar to the occurrence of topside ESF irregularities over Jicamarca. The likelihood of occurrence of F-region irregularities over Piura and, therefore, topside ESF over Jicamarca is greater when there are no E-region irregularities over Piura. On the other hand, there is more probability of observing bottomtype/bottomside ESF irregularities over Jicamarca when E-region irregularities are observed over Piura.Key words. Ionosphere (ionospheric irregularities; equatorial ionosphere; instruments and techniques)

Eiscat vhf radar observations of periodic mesopause echoes

1988 ◽  
Vol 36 (4) ◽  
pp. 423-428 ◽  
Author(s):  
H Rishbeth ◽  
AP van Eyken ◽  
B S Lanchester ◽  
T Turunen ◽  
J Röttger ◽  
...  
Keyword(s):  
Vhf Radar ◽  
Radar Observations
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