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We describe a new digital receiver for passive radar observation at HF, VHF, and UHF frequencies, which is free of Nyquist aliasing through 800 MHz. It follows the development of the digital… (More)
Passive radar permits inexpensive and stealthy detection and tracking of aerospace and geoscience targets. Transmitters of opportunity such as commercial FM broadcast, DTV broadcast, and cell phone… (More)
We present the calibration and reduction of Event Horizon Telescope (EHT) 1.3 mm radio wavelength observations of the supermassive black hole candidate at the center of the radio galaxy M87 and the… (More)