The Magdalena Ridge Observatory interferometer: a status update

Creech‐Eakman, M. J.; Romero, V.; Payne, Ifan; Haniff, Christopher A.; Buscher, David F.; Alvidrez, V.; Dahl, C.; Deninger, J.; Farris, Allen; Jimenez, Stephen R.; Jurgenson, C. A.; King, Ron; Klinglesmith, Daniel A.; McCracken, Tyler; Olivares, A.; Salcido, C.; Santoro, Fernando; Seamons, John; Selina, Robert; Shtromberg, A. V.; Steenson, J.; Torres, Nick; Fisher, Martin; Seneta, E.; Sun, Xiaowei; Wilson, Donald M.; Young, John S.

doi:10.1117/12.926516

Optical and Infrared Interferometry III 2012

DOI: 10.1117/12.926516

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The Magdalena Ridge Observatory interferometer: a status update

M. J. Creech‐Eakman

V. Romero

Ifan Payne

et al.

Abstract: The Magdalena Ridge Observatory Interferometer has been designed to be a 10 × 1.4 m aperture long-baseline optical/near-infrared interferometer in an equilateral "Y" configuration, and is being deployed west of Socorro, NM on the Magdalena Ridge. Unfortunately, first light for the facility has been delayed due to the current difficult funding regime, but during the past two years we have made substantial progress on many of the key subsystems for the array. The design of all these subsystems is largely complet… Show more

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Cited by 2 publications

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Interferometric imaging of geo-synchronous satellites with ground-based telescopes

Young

Haniff

Buscher

2013

2013 IEEE Aerospace Conference

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Inteferometric imaging with arrays of telescopes is now a routine technique in optical/infrared astronomy, delivering images with nano-radian resolution. Sensitive next generation arrays, such as the Magdalena Ridge Observatory Interferometer, thus offer a potentially important capability for space situational awareness, allowing satellites in geo-synchronous Earth orbit (GEO) to be inspected after launch. A critical factor for such observations is a lack of short spacings between the telescopes comprising the interferometric array. Large GEO satellites are frequently 20-30 m in size, hence ideally the shortest spacings used for the observations should be between 1.2-1.8 m for observations at 1 µm wavelength. These cannot easily be realised with existing separated-element arrays. In this paper we explore the approach of combining observations from a separated-element interferometer with interferometric data obtained by optical masking of a "single-dish" telescope. We present simulations that demonstrate that substantial improvements in image fidelity can be achieved in this way. Two shapes of generic satellite shape are investigated, intended to be representative of the majority of bright GEO targets, and the efficacy of the method is assessed for these different target shapes and differing brightness levels.

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Interferometric imaging of geo-synchronous satellites with ground-based telescopes

Young

Haniff

Buscher

2013

2013 IEEE Aerospace Conference

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The performance of the MROI fast tip-tilt correction system

et al. 2014

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The fast tip-tilt (FTT) correction system for the Magdalena Ridge Observatory Interferometer (MROI) is being developed by the University of Cambridge. The design incorporates an EMCCD camera protected by a thermal enclosure, optical mounts with passive thermal compensation, and control software running under Xenomai real-time Linux. The complete FTT system is now undergoing laboratory testing prior to being installed on the rst MROI unit telescope in the fall of 2014. We are following a twin-track approach to testing the closed-loop performance: tracking tip-tilt perturbations introduced by an actuated at mirror in the laboratory, and undertaking end-to-end simulations that incorporate realistic higher-order atmospheric perturbations. We report test results that demonstrate (a) the high stability of the entire opto-mechanical system, realized with a completely passive design; and (b) the fast tip-tilt correction performance and limiting sensitivity. Our preliminary results in both areas are close to those needed to realise the ambitious stability and sensitivity goals of the MROI which aims to match the performance of current natural guide star adaptive optics systems.

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The Magdalena Ridge Observatory interferometer: a status update

Cited by 2 publications

References 14 publications

Interferometric imaging of geo-synchronous satellites with ground-based telescopes

Interferometric imaging of geo-synchronous satellites with ground-based telescopes

The performance of the MROI fast tip-tilt correction system

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