Search Results - "Ellingson, S. W."

Bayesian constraints on the global 21-cm signal from the Cosmic Dawn by Bernardi, G., Zwart, J. T. L., Price, D., Greenhill, L. J., Mesinger, A., Dowell, J., Eftekhari, T., Ellingson, S. W., Kocz, J., Schinzel, F.

“…The birth of the first luminous sources and the ensuing epoch of reionization are best studied via the redshifted 21-cm emission line, the signature of the…”
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Coherent Time-domain Canceling of Interference for Radio Astronomy by Ellingson, S. W., Buehrer, R. M.

“…Abstract Radio astronomy is vulnerable to interference from a variety of anthropogenic sources. Among the many strategies for mitigation of this interference…”
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Path Loss in Reconfigurable Intelligent Surface-Enabled Channels by Ellingson, S. W.

“…A reconfigurable intelligent surface (RIS) employs an array of individually-controllable elements to scatter incident signals in a desirable way; for example,…”
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Design and characterization of the Large-aperture Experiment to Detect the Dark Age (LEDA) radiometer systems by Price, D C, Greenhill, L J, Fialkov, A, Bernardi, G, Garsden, H, Barsdell, B R, Kocz, J, Anderson, M M, Bourke, S A, Craig, J, Dexter, M R, Dowell, J, Eastwood, M W, Eftekhari, T, Ellingson, S W, Hallinan, G, Hartman, J M, Kimberk, R, Lazio, T Joseph W, Leiker, S, MacMahon, D, Monroe, R, Schinzel, F, Taylor, G B, Tong, E, Werthimer, D, Woody, D P

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The LWA1 Radio Telescope by Ellingson, S. W., Taylor, G. B., Craig, J., Hartman, J., Dowell, J., Wolfe, C. N., Clarke, T. E., Hicks, B. C., Kassim, N. E., Ray, P. S., Rickard, L. J., Schinzel, F. K., Weiler, K. W.

“…LWA1 is a new radio telescope operating in the frequency range 10-88 MHz, located in central New Mexico. The telescope consists of 258 pairs of dipole-type…”
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OBSERVATIONS OF CRAB GIANT PULSES IN 20-84 MHz USING LWA1 by Ellingson, S W, Clarke, T E, Craig, J, Hicks, B C, Lazio, T J W, Taylor, G B, Wilson, T L, Wolfe, C N

“…We report the detection and observed characteristics of giant pulses from the Crab Nebula pulsar (B0531+21) in four frequency bands covering 20-84 MHz using…”
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Probing Jovian decametric emission with the long wavelength array station 1 by Clarke, T. E., Higgins, C. A., Skarda, Jinhie, Imai, Kazumasa, Imai, Masafumi, Reyes, Francisco, Thieman, Jim, Jaeger, Ted, Schmitt, Henrique, Dalal, Nagini Paravastu, Dowell, Jayce, Ellingson, S. W., Hicks, Brian, Schinzel, Frank, Taylor, G. B.

“…New observations of Jupiter's decametric radio emissions have been made with the Long Wavelength Array Station 1 (LWA1), which is capable of making…”
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Design and analysis of low frequency strut-straddling feed arrays for EVLA reflector antennas by Harun, M., Ellingson, S. W.

“…A new feed system is designed for operation below 100 MHz. The only existing system on the EVLA operating below 100 MHz is the “4 m” (74 MHz) system which uses…”
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All-sky imaging of meteor trails at 55.25 MHz with the first station of the Long Wavelength Array by Helmboldt, J. F., Ellingson, S. W., Hartman, J. M., Lazio, T. J. W., Taylor, G. B., Wilson, T. L., Wolfe, C. N.

“…A new capability for high‐sensitivity, all‐sky monitoring of VHF meteor trail reflections with the first station of the Long Wavelength Array, or “LWA1,” is…”
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A polarimetric survey of radio-frequency interference in C- and X-bands in the continental united states using WindSat radiometry by Ellingson, S.W., Johnson, J.T.

“…Transmissions from ground-based systems in C- and X-bands present a significant challenge to the use of these bands for passive microwave remote sensing from…”
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Passive all-sky imaging radar in the HF regime with WWV and the first station of the Long Wavelength Array by Helmboldt, J. F., Clarke, T. E., Craig, J., Dowell, J. D., Ellingson, S. W., Hartman, J. M., Hicks, B. C., Kassim, N. E., Taylor, G. B., Wolfe, C. N.

“…We present a new passive, bistatic high‐frequency (HF) radar system consisting of the transmitters for the radio station WWV and the dipole antenna array that…”
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Antennas for the next generation of low-frequency radio telescopes by Ellingson, S.W.

“…The next generation of large telescopes for radio astronomy at frequencies below 100 MHz will consist of tens of thousands of wide-band dipole-like antennas,…”
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Effect of Antenna Pattern on Time-Domain Canceling of Interference from Satellites by Sengupta, R., Ellingson, S.W.

“…Signals from satellites are a source of interference to radio telescopes. One possible scheme for mitigation of this interference is coherent time-domain…”
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Design and commissioning of the LWA1 radio telescope by Ellingson, S. W., Craig, J., Dowell, J., Taylor, G. B., Helmboldt, J. F.

“…LWA1 is a new large radio telescope array operating in the frequency range 10-88 MHz, located in central New Mexico. The telescope consists of about 260 pairs…”
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Sidelobe Modification for Reflector Antennas by Electronically-Reconfigurable Rim Scattering by Ellingson, S. W, Sengupta, R

“…IEEE Antennas & Wireless Propagation Letters, Vol. 20, No. 6, June 2021, pp. 1083-7 Dynamic modification of the pattern of a reflector antenna system…”
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Coherent Time-Domain Canceling of Interference for Radio Astronomy by Ellingson, S. W, Buehrer, R. M

“…Radio astronomy is vulnerable to interference from a variety of anthropogenic sources. Among the many strategies for mitigation of this interference is…”
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New Results on Mitigation of Satellite Interference by Coherent Time-Domain Canceling by Ellingson, S.W., Buehrer, R.M., Anders, T., Li, X.

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OBSERVATIONS OF CRAB GIANT PULSES IN 20-84 MHz USING LWA1 by Ellingson, S. W., Clarke, T. E., Craig, J., Hicks, B. C., Lazio, T. J. W., Taylor, G. B., Wilson, T. L., Wolfe, C. N.

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A subspace-tracking approach to interference nulling for phased array-based radio telescopes by Ellingson, S.W., Hampson, G.A.

“…Several next-generation radio telescopes, now in the planning stages, are based on phased-array technology. One reason for this is to make use of adaptive…”
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An experimental study of antenna array calibration by Gupta, I.J., Baxter, J.R., Ellingson, S.W., Hyung-Geun Park, Hyun Seo Oh, Mun Geon Kyeong

“…The coupling matrix concept for predicting the radiation patterns of elements of an antenna array is studied. Measured data, as well as some numerical data,…”
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