| || Concentration and Grist size spectrum of Airborne dust during operation of earth moving machineries of Alluvial soil
Author : Ganguli, S.C. ;Datta Gupta, B.K. ;Gupte, R.D.
Source : Defence Science Journal ; Vol:13(1) ; 1963 ; pp 115-122
Subject : 551.51 Atmospheric Physics;551.5 Meteorology;551 Geology
Keywords : Spectrum ;Earth ;Dust ;Alluvial ;Soil ;Airborne
Abstract : Concentration and grist size spectrum of airborne dust generated by heavy earth moving machinery while operating on alluvial soil on the Indogangetic plain at Roorkee (29.52DegreeN, 77.53DegreeEN) has been determined.
| || Sampling of Airborne dust in heavily laden atmosphere
Author : Ganglia, S.C. ;Dutta Gupta, B.K. ;Ganguli, N.K.
Source : Defence Science Journal ; Vol:13(1) ; 1963 ; pp 109-114
Subject : 551 Geology;551.5 Meteorology;551.51 Atmospheric Physics
Keywords : Atmosphere ;Airborne dust
Abstract : The U.S. Bureau of Mines Sugar Tube Type B for determining rock dust in air has been modified to give higher filtering efficiency in a heavily laden atmosphere.
| || Tropospheric Scatter Propagation Measurements Beyond the Horizon in Arid Zone A Note
Author : Singh, M.D. ;Agrawala, S.N. ;Bhatnagar, P.S.
Source : Defence Science Journal ; Vol:35(4) ; 1985 ; pp 411-416
Subject : 551.51 Atmospheric Physics;551.5 Meteorology
Keywords : Troposcatter link ;C band ;Diurnal behaviour;Transmission loss
Abstract : Tropospheric scatter study beyond the horizon radio link presently necessitates tests to establish the median path loss and to determine the magnitude and duration of the path loss variations. The average basic transmission loss of the scattered component, L/sub bs/, can be found if K (ratio of r.m.s. value of scattered and constant component) and the resultant basic transmission loss L/sub bm/, are known. This paper also deals with the diurnal and seasonal behaviour of signal strength, based on the analysis of about ten months recording on a C band Troposcatter Link between Pilani and Delhi.