Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Gozzard, David"'
Autor:
Frost, Alex M., Dix-Matthews, Benjamin P., Walsh, Shane M., Gozzard, David R., Schediwy, Sascha W.
We present the generalised design of low-complexity, small aperture optical terminals intended for kilometre-scale, terrestrial, free-space laser links between fixed and dynamic targets. The design features single-mode fibre coupling of the free-spac
Externí odkaz:
http://arxiv.org/abs/2407.04745
Autor:
McSorley, Shawn M. P., Dix-Matthews, Benjamin P., Frost, Alex M., McCann, Ayden S., Karpathakis, Skevos F. E., Gozzard, David R., Walsh, Shane M., Schediwy, Sascha W.
The comparison of optical reference frequency signals over free-space optical links is limited by the relative motion between local and remote sites. For ground to low earth orbit comparison, the expected Doppler shift and Doppler rate typically reac
Externí odkaz:
http://arxiv.org/abs/2402.08899
Autor:
Walsh, Shane, Frost, Alex, Anderson, William, Digney, Toby, Dix-Matthews, Benjamin, Gozzard, David, Gravestock, Charles, Howard, Lewis, Karpathakis, Skevos, McCann, Ayden, Schediwy, Sascha
Free-space communications at optical wavelengths offers the potential for orders-of-magnitude improvement in data rates over conventional radio wavelengths, and this will be needed to meet the demand of future space-to-ground applications. Supporting
Externí odkaz:
http://arxiv.org/abs/2201.11846
Autor:
Gozzard, David R., Howard, Lewis A., Dix-Matthews, Benjamin P., Karpathakis, Skevos, Gravestock, Charles, Schediwy, Sascha W.
A global network of optical atomic clocks will enable unprecedented measurement precision in fields including tests of fundamental physics, dark matter searches, geodesy, and navigation. Free-space laser links through the turbulent atmosphere are nee
Externí odkaz:
http://arxiv.org/abs/2103.12909
Autor:
Dix-Matthews, Benjamin P., Gozzard, David R., Karpathakis, Skevos F. E., Gravestock, Charles T., Schediwy, Sascha W.
Free-space optical (FSO) communications has the potential to revolutionize wireless communications due to its advantages of inherent security, high-directionality, high available bandwidth and small physical footprint. The effects of atmospheric turb
Externí odkaz:
http://arxiv.org/abs/2010.03745
Autor:
Dix-Matthews, Benjamin P., Schediwy, Sascha W., Gozzard, David R., Savalle, Etienne, Esnault, François-Xavier, Lévèque, Thomas, Gravestock, Charles, D'Mello, Darlene, Karpathakis, Skevos, Tobar, Michael, Wolf, Peter
Publikováno v:
Nat Commun 12, 515 (2021)
Timescale comparison between optical atomic clocks over ground-to-space and terrestrial free-space laser links will have enormous benefits for fundamental and applied science, from measurements of fundamental constants and searches for dark matter, t
Externí odkaz:
http://arxiv.org/abs/2007.04985
Autor:
Karpathakis, Skevos F. E., Gravestock, Charles T., Gozzard, David R., Pulbrook, Thea R., Schediwy, Sascha W.
Next generation radio telescopes, such as the Square Kilometre Array (SKA) and Next Generation Very Large Array (ngVLA), require precise microwave frequency reference signals to be transmitted over fiber links to each dish to coherently sample astron
Externí odkaz:
http://arxiv.org/abs/2007.00157
Autor:
Dix-Matthews, Benjamin P., Schediwy, Sascha W., Gozzard, David R., Driver, Simon, Schreibe, Karl Ulrich, Carman, Randall, Tobar, Michael
Publikováno v:
J Geod 94, 55 (2020)
Doppler orbitography uses the Doppler shift in a transmitted signal to determine the orbital parameters of satellites including range and range-rate (or radial velocity). We describe two techniques for atmospheric-limited optical Doppler orbitography
Externí odkaz:
http://arxiv.org/abs/2005.02546
Akademický článek
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Autor:
Schediwy, Sascha, Gozzard, David
The Square Kilometre Array (SKA) project is an international effort to build the world's most sensitive radio telescope operating in the 50 MHz to 14 GHz frequency range. Construction of the SKA is divided into phases, with the first phase (SKA1) acc
Externí odkaz:
http://arxiv.org/abs/1808.04696