There are many important astrophysical questions which could be answered with observations at frequencies of a few MHz and angular resolution of an arcminute or better. For example, strong interstellar and interplanetary scattering of electromagnetic radiation could be studied along many lines of sight, and the sizes and shapes of scattering disks could be directly measured as a function of time and frequency. Such data can be obtained with an interferometer array composed of several small satellites in Earth orbit. The individual satellites for a low frequency array could be very small and inexpensive.