Search Results - "Carozzi, T."

A Fundamental Figure of Merit for Radio Polarimeters by Carozzi, T D, Woan, G

“…Many modern radio applications, such as astronomy and remote sensing, require high-precision polarimetry. These applications put exacting demands on radio…”
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Utilization of photon orbital angular momentum in the low-frequency radio domain by Thidé, B, Then, H, Sjöholm, J, Palmer, K, Bergman, J, Carozzi, T D, Istomin, Ya N, Ibragimov, N H, Khamitova, R

“…We show numerically that vector antenna arrays can generate radio beams that exhibit spin and orbital angular momentum characteristics similar to those of…”
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A generalized measurement equation and van Cittert-Zernike theorem for wide-field radio astronomical interferometry by Carozzi, T. D., Woan, G.

“…We derive a generalized van Cittert-Zernike (vC-Z) theorem for radio astronomy that is valid for partially polarized sources over an arbitrarily wide field of…”
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Intrinsic instrumental polarization and high-precision pulsar timing by Foster, G., Karastergiou, A., Paulin, R., Carozzi, T. D., Johnston, S., van Straten, W.

“…Radio telescopes are used to accurately measure the time of arrival (ToA) of radio pulses in pulsar timing experiments that target mostly millisecond pulsars…”
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Orbital angular momentum in radio: Measurement methods by Mohammadi, Siavoush M., Daldorff, Lars K. S., Forozesh, Kamyar, Thidé, Bo, Bergman, Jan E. S., Isham, Brett, Karlsson, Roger, Carozzi, T. D.

“…Novel measurement and approximation methodologies for studying orbital angular momentum (OAM) modes in radio beams, i.e., electromagnetic beam modes having…”
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First results of electric field and density observations by Cluster EFW based on initial months of operation by Gustafsson, G., André, M., Carozzi, T., Eriksson, A. I., Fälthammar, C.-G., Grard, R., Holmgren, G., Holtet, J. A., Ivchenko, N., Karlsson, T., Khotyaintsev, Y., Klimov, S., Laakso, H., Lindqvist, P.-A., Lybekk, B., Marklund, G., Mozer, F., Mursula, K., Pedersen, A., Popielawska, B., Savin, S., Stasiewicz, K., Tanskanen, P., Vaivads, A., Wahlund, J.-E.

“…Highlights are presented from studies of the electric field data from various regions along the Cluster orbit. They all point towards a very high coherence for…”
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Competition between Langmuir and upper-hybrid turbulence in a high-frequency-pumped ionosphere by Thidé, B, Sergeev, E N, Grach, S M, Leyser, T B, Carozzi, T D

“…We show how the secondary escaping radiation, also known as stimulated electromagnetic emission (SEE), from the ionosphere irradiated by a high-intensity radio…”
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Asymmetric response of the topside ionosphere to large-scale IGW generated during the November 30, 1979, substorm by Karpachev, A.T., Deminova, G.F., Beloff, N., Carozzi, T.D., Denisenko, P.F., Lester, M., Karhunen, T.

“…We used bottomside ground observations and topside sounding data from the Intercosmos-19 satellite to study a Travelling Ionospheric Disturbance (TID) that…”
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Detection of large scale TIDs associated with the dayside cusp using SuperDARN data by Karpachev, A.T., Beloff, N., Carozzi, T.D., Denisenko, P.F., Karhunen, T.J.T., Lester, M.

“…Variations in the dayside ionosphere parameters as a result of a large-scale acoustic gravity wave (LS AGW) were studied for the 17 February 1998 substorm…”
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Observation of continuum radiations from the Cluster fleet: first results from direction finding by DECREAU, P. M. E, DUCOIN, C, BUCKLEY, A. M, CAROZZI, T. D, LE ROUZIC, G, RANDRIAMBOARISON, O, RAUCH, J.-L, TROTIGNON, J.-G, VALLIERES, X, CANU, P, DARROUZET, F, GOUGH, M. P

“…The Cluster fleet offers the first possibility of comparing non-thermal terrestrial continuum radiation from similarly equipped nearby observation points. A…”
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New Definition for Dual-Polarized Antenna Sensitivity by Carozzi, T. D.

“…Sensitivity is arguably the single most important defining characteristic of a radio telescope. This is because it sets the threshold for what sources can…”
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Imaging on a sphere with interferometers: the spherical wave harmonic transform by Carozzi, T. D.

“…I present an exact and explicit solution to the scalar (Stokes flux intensity) radio interferometer imaging equation on a spherical surface which is valid also…”
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Precession of the whistler polarisation plane normal observed on Freja by Karlsson, R. L., Carozzi, T. D., Bergman, J. E. S., Eriksson, A. I.

“…We have observed that the normal to the polarisation plane of a whistler precesses around the geomagnetic field. Magnetic field observations by the Freja…”
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Parallel processing speed increase of the one-bit auto-correlation function in hardware by Huber, Nicolas, Hromalik-Pouchet, M.S., Carozzi, T.D., Gough, M.P., Buckley, A.M.

“…Recently, a serial implementation of the one-bit auto- and cross-correlation functions (ACF and CCF respectively) in a field programmable gate array (FPGA) has…”
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Stimulated electromagnetic emissions during pump frequency sweep through fourth electron cyclotron harmonic by Carozzi, T. D., Thidé, B., Grach, S. M., Leyser, T. B., Holz, M., Komrakov, G. P., Frolov, V. L., Sergeev, E. N.

“…The frequency of a high‐power HF radio wave incident on the ionosphere was swept, using a computer‐controlled transmitter signal, in <10 s within a 60‐kHz‐wide…”
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Observations of auroral broadband emissions by CLUSTER by Wahlund, J.-E., Yilmaz, A., Backrud, M., Sundkvist, D., Vaivads, A., Winningham, D., André, M., Balogh, A., Bonnell, J., Buchert, S., Carozzi, T., Cornilleau, N., Dunlop, M., Eriksson, A. I., Fazakerley, A., Gustafsson, G., Parrot, M., Robert, P., Tjulin, A.

“…We present the results of a study based on several events of broadband ULF/ELF emissions observed in the auroral region by the CLUSTER multi‐spacecraft at…”
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Instantaneous local wave vector estimation from multi-spacecraft measurements using few spatial points by CAROZZI, T. D, BUCKLEY, A. M, GOUGH, M. P

“…We introduce a technique to determine instantaneous local properties of waves based on discrete-time sampled, real-valued measurements from 4 or more spatial…”
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Statistical properties of ionospheric stimulated electromagnetic emissions by KARLSSON, R. L, CAROZZI, T. D, NORIN, L, BERGMAN, J. E. S, THIDE, B

“…We have analysed the statistical properties of the stimulated electromagnetic emissions (SEE) spectral features in the steady state, reached after a long…”
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Global pattern of the ionospheric response to large-scale internal gravity waves by Karpachev, A.T., Deminova, G.F., Beloff, N., Carozzi, T.D., Denisenko, P.F., Karhunen, T.J.T., Lester, M.

“…The global pattern of the ionospheric response to large-scale acoustic gravity waves (LS AGW) has been constructed on the basis of an analysis of the large…”
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Intrinsic cross-polarization ratio (IXR) for antenna arrays and improving polarimetry via polarization diversity by Carozzi, T. D.

“…Future radio telescopes such as the SKA, will have to employ aperture arrays with full polarimetry for observations at the lowest frequencies. In the design…”
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