Measuring solar wind velocity with spacecraft phase scintillations

Details Measuring solar wind velocity with spacecraft phase scintillations Measuring solar wind velocity with spacecraft phase scintillations

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.266..514w&link_type=abstract

Nature, vol. 266, Apr. 7, 1977, p. 514. NASA-supported research.

Astronomy and Astrophysics

Astronomy

6

Phase Deviation, Radio Sources (Astronomy), Scintillation, Solar Wind Velocity, Amplitudes, Interplanetary Medium, Signal To Noise Ratios

Scientific paper

The measurement of spacecraft phase scintillations with a coherent dual-frequency radio system permits solar-wind velocity measurements based on multiple-station phase scintillations. Advantages of measuring solar-wind velocity on the basis of multiple-station phase scintillations are discussed with respect to amplitude scintillations. These advantages include the ability to carry out observations closer to the sun, a much wider range of possible baselines, a lower S/N ratio for long-baseline phase measurements, and a wider range of antenna sizes and receiver noise temperatures. NASA antennas particularly suitable for these measurements are identified, and observations with the coherent S/X radio system aboard various NASA spacecraft intended for deep-space missions are proposed.

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