Further investigations on 150-km echoing riddle using simultaneous observations of 150-km and e region echoes from off-electrojet location Gadanki

Journal of Geophysical Research: Space Physics

Volumn 112, Issue 9, 2007, Pages

  Patra, A K ^a   Rao, N Venkateswara ^a  

^a NATIONAL ATMOSPHERIC RESEARCH LABORATORY   (India)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 36148976470     PISSN: None     EISSN: 21699402     Source Type: Journal    
DOI: 10.1029/2006JA012204     Document Type: Article

References (24)

1. Balsley, B. B. (1964), Evidence of stratified echoing region at 150 km in the vicinity of magnetic equator during daylight hours, J. Geophys. Res., 69, 1925.
2. Blanc, E., B. Mercandalli, and E. Houngninou (1996), Kilometric irregularities in the E and F regions of the daytime equatorial ionosphere observed by a high resolution HF radar, Geophys. Res. Lett., 23, 645.
3. Chau, J. L. (2004), Unexpected spectral characteristics of VHF radar signals from 150-km region over Jicamarca, Geophys. Res. Lett., 31, L23 803, doi: 10.1029/2004GL021620.
4. Chau, J. L., and E. Kudeki (2006), Statistics of 150-km echoes over Jicamarca based on low-power VHF observations, Ann. Geophys., 24, 1305.
5. Chau, J. L., and R. F. Woodman (2004), Daytime vertical and zonal velocities from 150-km echoes: Their relevance to F-region dynamics, Geophys. Res. Lett., 31, L17801, doi:10.1029/2004GL020800.
6. Choudhary, R. K., J.-P. St.-Maurice, and K. K. Mahajan (2004), Observation of coherent echoes with narrow spectra near 150 km altitude during daytime away from the dip equator, Geophys. Res. Lett., 31, L19801, doi: 10.1029/2004GL020299.
7. de Paula, E. R., and D. L. Hysell (2004), The Sao Luis 30 MHz coherent scatter ionospheric radar: System description and initial results, Radio Sci., 39, RS1014, doi:10.1029/2003RS002914.
8. Fejer, B. G., D. T. Farley, R. F. Woodman, and C. Calderon (1979), Dependence of equatorial F-region vertical drifts on season and solar cycle, J. Geophys. Res., 84, 5792.
9. Fejer, B. G., E. R. de Paula, S. A. Gonzalez, and R. F. Woodman (1991), Average vertical and zonal F region plasma drifts over Jicamarca, J. Geophys. Res., 96, 13,901.
10. Hysell, D. L., and E. Kudeki (2004), Collisional shear instability in the equatorial F region ionosphere, J. Geophys. Res., 109, A11301, doi: 10.1029/2004JA010636.
11. Hysell, D. L., M. F. Larsen, and R. F. Woodman (1993), JULIA radar studies of electric fields in the equatorial electrojet, Geophys. Res. Lett., 24, 16871997.
12. Kudeki, E., and C. D. Fawcett (1993), High resolution observations of 150 km echoes at Jicamarca, Geophys. Res. Lett., 20, 1987.
13. Kudeki, E., C. D. Fawcett, W. L. Ecklund, P. E. Johnston, and S. J. Franke (1998), Equatorial 150-km irregularities observed at Pohnpei, Geophys. Res. Lett., 25, 4097.
14. Patra, A. K., and N. V. Rao (2006), Radar observations of daytime 150-km echoes from outside the equatorial electrojet belt over Gadanki, Geophys. Res. Lett., 33, L03104, doi:10.1029/2005GL024564.
15. Patra, A. K., S. Sripathi, V. Sivakumar, and P. B. Rao (2004), Statistical characteristics of VHF radar observations of low latitude E-region irregularities over Gadanki, J. Atmos. Solar Terr. Phys., 66, 1615.
16. Prakash, S., S. P. Gupta, and B. H. Subbaraya (1969), Irregularities in the equatorial E region over Thumba, Radio Sci., 4, 791.
17. Royrvik, O. (1982), Drift and aspect sensitivity of scattering irregularities in the upper equatorial E-region, J. Geophys. Res., 87, 8338.
18. Royrvik, O., and K. L. Miller (1981), Nonthermal scattering of radio waves near 150 km above Jicamarca, Peru, J. Geophys. Res., 86, 180.
19. Scherliess, L., and B. G. Fejer (1999), Radar and satellite global equatorial F region vertical drift model, J. Geophys. Res., 104, 6829.
20. Smith, L. G., and O. Royrvik (1985), Electron density irregularities in the day-time equatorial ionosphere, J. Atmos. Terr. Phys., 47, 813.
21. sq over Kwajalein and their relationship to 150 km echoes over dip equator, Geophys. Res. Lett., 21, 2741.
22. Tsunoda, R. T., and W. L. Ecklund (2000), On the nature of 150-km radar echoes over the magnetic dip equator, Geophys. Res. Lett., 27, 657.
23. 1) radar echoes over Pohnpei, Geophys. Res. Lett., 31, L06810, doi: 10.1029/2003GL018704.
24. Woodman, R. F. (1970), Vertical drift velocities and east-west electric fields at the magnetic equator, J. Geophys. Res., 75, 6249.