The low frequency space array

Details The low frequency space array The low frequency space array

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986nrl..reptq....d&link_type=abstract

Interim Report Naval Research Lab., Washington, DC.

Astronomy and Astrophysics

Astronomy

Astronomy, Electromagnetic Absorption, Interferometry, Ionospheric Propagation, Arrays, Atmospheric Windows, Earth (Planet), Electromagnetic Spectra, High Frequencies, High Resolution, Hydrogen, Images, Interstellar Matter, Ionization Frequencies, Low Frequencies, Radiation Absorption, Sensitivity, Sky

Scientific paper

A scientific justification and technical description is developed for the construction of a Low Frequency Space Array (LFSA) to carry out full sky mapping and individual source imaging at frequencies between 1.5 and 26.3 MHz; a frequency range over which the Earth's ionosphere transmits poorly or not at all. Such an instrument, with high resolution and high sensitivity, will open a new window in the electromagnetic spectrum to astronomical investigations. It will also bring astronomy to the fundamental limit below which observations from within the Milky Way become impossible due to absorption by the diffuse ionized hydrogen component of the interstellar medium. Many high quality scientific programs can already be specified for such an instrument and, due to the fact that it will be operating in essentially unexplored ranges of frequency, sensitivity and resolution, the likelihood of discovering entirely unexpected objects and processes is large. Also, even though the technology for constructing the elements of the LSFA already exists, its operation as an entirely space based synthesis interferometer will represent a significant advance in space capability.

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