Chakrabarthy D., R.Sekar, R. Narayanan, A. K. Patra, and C. V. Devasia, Effects of interplanetary electric field on the development of an equatorial spread F event, J. Geophys. Res., 111, A12316, doi: 10.1029/ 2006JA011884, 2006.

Phanikumar, D. V., K. Chenna Reddy and G. Yellaiah, Radar observations of Leonid meteor shower 2003,  Astrophys. Space Sci., 306, 235-239, 2006.

Kumar, K. K., VHF radar observations of convectively generated gravity waves: some new insights, Geophys., Res. Lett., 33, L01815, doi:10.1029/ 2005GL024109, 2006.

Bhavani Kumar, Y., C. Nageswara Raju and M. Krishnaiah, Indo-Japanese Lidar Observations of the Tropical Middle Atmosphere during 1998 and 1999, Advances in Atmosheric Sciences, 23 (5), 711-725, 2006

Bhavani Kumar, Y., Portable lidar system for atmospheric boundary layer measurements, J. Optical Engineering, 45(7), 076201, 2006.

Patra, A. K, S. Sripathi, P.B. Rao, and R. K. Choudhary, Gadanki radar observations of daytime E region echoes and structures extending down to 87 km, Ann. Geophys, 24, 1861-1869, 2006 during 1997/98 El Nino using Indian MST Radar, Journal of Applied Meteorology and Climatology, 46, 112-119, 2007

Sivakumar, V., P. B. Rao and H. Bencherif, Lidar observations of middle atmos-pheric gravity wave activity over a low-latitude site (Gadanki,13.5oN,79.2o E), Ann. Geophys, 24, 823-834, SRef-ID: 1432-0576/ag/2006-24-823, 2006

Mrudula, G., K. Mohan Kumar and K. Kishore Kumar, Wind characteristics of the troposphere and lower stratosphere during the passage of a tropical cyclone over India using VHF radar, J. Atmos. Solar Terr. Phys., 68, 869-876, doi:10.1016/ j.jastp.2005.12.006, 2006

Kumar, K. K., and A. R. Jain, L band wind profiler observations of convective boundary layer over Gadanki, India (13.5oN,79.2o E), Radio Sci., 41, doi : 10.1029/2005RS003259, 2006

Sivakumar, V., H. Bencherif, A. Hauchecorne, P. Keckhut, D. N. Rao, S. Sharma, H. Chandra, A. Jayaraman and P. B. Rao, Rayleigh lidar observations of double stratopause structure over three different northern hemisphere stations, Atmos. Chem. Phys. and Discuss., 6, 6933-6956, 2006

Abdu, M. A. , T. K. Ramkumar, I. S. Batista, C. G. M. Brum, H. Takahashi, B. W. Reinisch and J. H. A. Sobral, Planetary wave signatures in the equatorial atmosphere–ionosphere system and mesosphere- E- and F-region coupling, J. Atmos. Solar Terr. Phys., 68, 509-522, 2006

Toshiaki Kozu, K. Krishna Reddy, Shuichi Mori, Merhala Thurai, J.Teong Ong, D. Narayana Rao and Toyoshi  Shimomai, Seasonal and Diurnal Variations of Raindrop Size Distributions in Asian Monsoon Region, Journal of the Meteorological Society of Japan, 84A, 195-209, 2006

Kishore, P., S. P. Namboothiri, K. Igarashi, V. Sivakumar, S. Thulasiraman,I. V. Subba Reddy, K. Mizutani, D. Narayana Rao, S. V. B. Rao and Y. Bhavani Kumar, Rayleigh lidar observations of planetary waves in the middle atmosphere over Gadanki (13.5oN, 79.2o E), J. Atmos. Solar Terr. Phys., 68, 901-910, doi:10.1016/j.jastp.2006.01.010., 2006

Deepa, V., G. Ramkumar and B. V. Krishna Murthy, Gravity waves observed from the Equatorial Wave Studies (EWS) campaign during1999 and 2000 and their role in the generation of stratospheric semiannual oscillations, Ann. Geophys.,24, 2481–2491, 2006

Ramkumar, T. K., Y. Bhavanikumar, D. Narayana Rao, S. Gurubaran, A. Narendra Babu, A. K. Ghosh and R. Rajaram, Observational evidences on the influences of tropical lower atmospheric ~20 day oscillation on the ionospheric equatorial electrojet, J. Atmos. Solar Terr. Phys., 68, 523-538, doi: 10.1016/j.jastp.2005.03.026, 2006

Patra, A. K., and N. Venkateswara Rao, Radar observations of daytime 150-km echoes from outside the equatorial electrojet belt over Gadanki, Geophys. Res. Lett., 33, L03104, doi: 10.1029/2005GL024564, 2006

 Ramkumar, G., T. M. Antonita, Y. Bhavani Kumar, H. Venkata Kumar, and D. Narayana Rao, Seasonal variation of gravity waves in the Equatorial Middle Atmosphere: results from ISRO’s Middle Atmospheric Dynamics (MIDAS) program, Ann. Geophys,  24, 2471–2480, 2006