Atmospheric radio noise bursts in the LF band at Bangalore

S.V.C. Aiya, K.N. Lakshminarayan
1965 Journal of Research of the National Bureau of Standards Section D Radio Science  
An a tm os ph e ri c radi u noise burs t re prese nt s the rad ia ti o n rece ived from o ne co mpl e te li ghtnin g fla s h a t t he freq ue nc y to wh ic h til e rece ive r is tun ed a nd wi thin th e rece ive r ba ndwidth . Th e c ha rac te ri s ti cs of s ll c h no ise burs ts ari s ing fro m so urces a t va ri o us d is ta nces hav e bee n inves ti gate d. Th e gro up o f burs ts wit h th e h ighes t a mplitud es prese nt a t a n y g ive n tim e c a n be invcs ti ga ted se pa ra te ly b y
more » ... se pa ra te ly b y adjus tin g t he se ns itiv ity of th e rece iv er. Th e numbe r of burs ts in a gro up du e to so urces up to a boll t 1000 km m()st ly lies be tw ee n 10 a nd 40 pe r minut e. Th e s ho rt a nd lo ng te rm a mplitud e a nd tim e c ha rac te ri s ti es of th ese burs ts have bee n inves ti gate d. Th e di s tributi o ns a re found to be lognormal. In th e case o f ' di s tri b u ti o ns of pal'um e te rs s tudi e d ove r a s hort pe ri od o f tim e, th e s tandard d e vi atio n is prac ti ca ll y co ns ta nt. Th e lo ng te rm c ha rac te ri s ti cs indi c a te that th e re a re sys te mati c variation s from 12 to 20 hI' 1S T .
doi:10.6028/jres.069d.147 fatcat:2m5xz26ztzfn3krdp2dl22j34q