Estimation of turbulence parameters in the lower atmosphere from MST radar observations

2004 ◽  
Vol 130 (599) ◽  
pp. 1235-1249 ◽  
Author(s):  
K. Satheesan ◽  
B. V. Krishna Murthy
Keyword(s):  
Lower Atmosphere ◽  
Radar Observations ◽  
Mst Radar ◽  
Turbulence Parameters

Deduction of temperature profile from MST radar observations of vertical wind

1996 ◽  
Vol 23 (3) ◽  
pp. 285-288 ◽  
Author(s):  
K. Revathy ◽  
S. R. Prabhakaran Nair ◽  
B. V. Krisha Murthy
Keyword(s):  
Temperature Profile ◽  
Vertical Wind ◽  
Radar Observations ◽  
Mst Radar

MST radar observations of short-period gravity wave during overhead tropical cyclone

Radio Science ◽  
2012 ◽  
Vol 47 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Siddarth Shankar Das ◽  
K. N. Uma ◽  
Subrata Kumar Das
Keyword(s):  
Tropical Cyclone ◽  
Gravity Wave ◽  
Radar Observations ◽  
Short Period ◽  
Mst Radar

scholarly journals Tidal wind oscillations in the tropical lower atmosphere as observed by Indian MST Radar

2001 ◽  
Vol 19 (8) ◽  
pp. 991-999 ◽  
Author(s):  
M. N. Sasi ◽  
G. Ramkumar ◽  
V. Deepa
Keyword(s):  
Seasonal Variation ◽  
Solar Radiation ◽  
Meridional Wind ◽  
Radar Data ◽  
Short Wave ◽  
Tropical Meteorology ◽  
Lower Atmosphere ◽  
Radiation Absorption ◽  
Tidal Theory ◽  
Mst Radar

Abstract. Diurnal tidal components in horizontal winds measured by MST radar in the troposphere and lower stratosphere over a tropical station Gadanki (13.5° N, 79.2° E) are presented for the autumn equinox, winter, vernal equinox and summer seasons. For this purpose radar data obtained over many diurnal cycles from September 1995 to August 1996 are used. The results obtained show that although the seasonal variation of the diurnal tidal amplitudes in zonal and meridional winds is not strong, vertical phase propagation characteristics show significant seasonal variation. An attempt is made to simulate the diurnal tidal amplitudes and phases in the lower atmosphere over Gadanki using classical tidal theory by incorporating diurnal heat sources, namely, solar radiation absorption by water vapour, planetary boundary layer (PBL) heat flux, latent heat release in deep convective clouds and short wave solar radiation absorption by clouds. A comparison of the simulated amplitudes and phases with the observed ones shows that agreement between the two is quite good for the equinox seasons, especially the vertical structure of the phases of the meridional wind components.Key words. Meteorology and atmospheric dynamics (tropical meteorology; waves and tides)

scholarly journals Gadanki radar observations of daytime E region echoes and structures extending down to 87 km

2006 ◽  
Vol 24 (7) ◽  
pp. 1861-1869 ◽  
Author(s):  
A. K. Patra ◽  
S. Sripathi ◽  
P. B. Rao ◽  
R. K. Choudhary
Keyword(s):  
Spectral Width ◽  
Plasma Waves ◽  
Observational Period ◽  
Low Velocity ◽  
Radar Observations ◽  
Mst Radar ◽  
Collisional Damping ◽  
E Region ◽  
Low Altitude

Abstract. Observations of daytime E region echoes extending to altitudes as low as 87 km made using the Gadanki MST radar are presented. The echoing regions display descending layer resembling the characteristics of tidal winds and show structures with periods 2–4 min having both positive and negative slopes. At the center of the layer where strongest SNR is observed, the velocity is maximum and spectral width is minimum. At altitudes slightly above and below, where SNR is relatively low, velocity is low but spectral width is maximum. Daytime observations of echoes extending to such a low altitude and associated structures akin to nighttime quasi-periodic echoes throughout the observational period are the most significant results, not reported earlier from Gadanki and other locations. Other notable results are large SNR (as high as 15 dB) and spectral width (as high as 70 m/s) at the bottommost altitudes, where collisional damping of the plasma waves is significant

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