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Showing 1 to 6 of 6 for “"NRAO"”.
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A millimeter-wave interferometric study of gas-phase silicon dicarbide in the circumstellar envelope surrounding IRC+10216
… envelope (CSE) surrounding IRC+10216. The NRAO 12-m telescope was used to fill in missing flux from large scale structure not detected by the interferometer. The interferometry and 12-m single-element data were combined to make full synthesis maps of emission from SiC$\sb2$ toward IRC+10216.
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Nineteen-Element Phased-Array Feed Development and Analysis on Effects of Focal Plane Offset and Beam Steering on Sensitivity
… at the National Radio Astronomy Observatory (NRAO) in Green Bank West Virginia for use on the Green Bank 20-Meter Telescope. Numerical simulations were performed to determine how sensitivity was affected by electronic beam steering and offset of the phased array feed (PAF) relative to the …
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Characterization of a Phased Array Feed Model
… array. Experiments were performed at the NRAO site in Green Bank, West Virginia, and utilized the outdoor antenna test range and 20 meter radio telescope. Accurate modeling of the PAF requires modeling the signal and noise characteristics of the array, which is a computationally large …
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Time Blanking for GBT Data with RADAR RFI
… at the National Radio Astronomy Observatory (NRAO) at Green Bank, West Virginia, USA, where this RADAR system causes significant data corruption. Using this data, we present a blanking technique to separate RFI from cosmic signal. There are generally two blanking approaches, time window …
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Characterization of Radio Emission from Young Stellar Objects
… the 150 MHz TIFR GMRT Sky Survey, the 1.4 GHz NRAO VLA Sky Survey, and the 3 GHz VLA Sky Survey, as well as a targeted large program of 66 young stellar systems with the Disks@EVLA project at 5.8 GHz, 21 GHz, 34 GHz, and 41 GHz. These findings are analyzed in the context of possible emission …
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Real-time Adaptive Cancellation of Satellite Interference in Radio Astronomy
Radio astronomy is the science of observing the heavens at radio frequencies, from a few kHz to approximately 300 GHz. In recent years, radio astronomy has faced a growing interference problem as radio frequency (RF) bandwidth has become an increasingly scarce commodity. A programmable real-time …