Effects of Scintillation on Synchronous Satellite Communication Signals at 250 MHz.
Research and development rept. May-Aug 70,
NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA
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The effects of the phenomenon of scintillation on synchronous satellite communication signals at 250 MHz are determined. Thin-phase-diffracting-screen theory is used to convert to 250 MHz scintillation data observed at 136 MHz. The following findings are made 1 for weak scattering and no magnetic field, scintillation is a serious limitation at zenith angles larger than 50 degrees 2 at 250 MHz, the range of frequencies over which amplitude scintillations are highly correlated is extremely wide for weak scattering but much narrower for strong scattering 3 the distance for which correlation between spaced receivers on the ground falls to 50 percent is less than 1.1 km for weak scattering and less than 0.675 for strong scattering 4 the periods of fading range from 6 to 60 sec. Author
- Unmanned Spacecraft
- Radio Communications