Space VLBI at Low Frequencies
At sufficiently low frequencies, no ground-based radio array will be able to produce high resolution images while looking through the ionosphere.
Engineering topics
Publications and source records attributed to Desch, M..
At sufficiently low frequencies, no ground-based radio array will be able to produce high resolution images while looking through the ionosphere.
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A radio interferometer array in space providing high dynamic range images with unprecedented angular resolution over the broad frequency range from 0.030 - 30 MHz will open new vistas in solar, terrestial, galactic, and extragalactic astrophysics.
Using a model to simulate wave propagation, estimates were obtained on the effect of the earth's magnetosphere on the imaging potential of the Low-Frequency Space Array mission for observations above the ionosphere at frequencies below about 10 MHz. Results of this simulation show that, for imaging at 1.5 MHz, large orbital radii will be required. It is concluded that successful imaging from within the plasmasphere may depend upon the feasibility of correction schemes.