1962•Journal of Research of the National Bureau of Standards Section D Radio PropagationOpen access
Propagation problems with space radio communications
K. Rawer
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Abstract
Ionospheric a nd tropospheric refraction and absorption influence earth-space propagat ion. The relative importance of t he ionospheri c influence is considerably la rger t ha n in terrestria l propagation. Apart from t he effects of t his latter known from experience, some new phenomena have bee n observed, viz , special cases of a ntipode r eception , fi eld-st rength scin t ill ations and blackouts. Specifi c phase effects have been observed: t he Doppler-effect is due to t he satelli tes qui ck moveme nt, t he Faraday effect is caused by the prese nce of double refr action in the ionosphere. Both cffects prese nt so me difficulties for most app li cat ions. Th e most importa nt tropos pheri c effccts are molec ula r absorption a nd t he correspondin g statis t ical noise.
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