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Dissertations / Theses on the topic 'Spectrograms'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Im, Jinhyeok. "Numerical analysis of spectrograms in attosecond photoionisation." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP175.

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Depuis leur première observation au début des années 2000, les impulsions lumineuses attosecondes (1 as = 10^-18 s) dans le domaine de l'ultraviolet extrême (XUV) ont révolutionné l'étude de la dynamique électronique dans les atomes et les molécules. La spectroscopie attoseconde basée sur la photoionisation assistée par laser a permis d'observer des processus ultrarapides tels que les délais temporels dans l'effet photoélectrique. Cette approche consiste à mesurer l'énergie cinétique des photoélectrons émis lors de l'ionisation d'atomes ou de molécules par une impulsion attoseconde combinée à

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Ford, George Harold. "Spoken Language Identification from Processing and Pattern Analysis of Spectrograms." NSUWorks, 2014. http://nsuworks.nova.edu/gscis_etd/152.

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Prior speech and linguistics research has focused on the use of phonemes recognition in speech, and their use in formulation of recognizable words, to determine language identification. Some languages have additional phoneme sounds, which can help identify a language; however, most of the phonemes are common to a wide variety of languages. Legacy approaches recognize strings of phonemes as syllables, used by dictionary queries to see if a word can be found to uniquely identify a language. This dissertation research considers an alternative means of determining language identification of speech

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McMullen, Cheyenne. "ASMR, Spectrograms, and Adam Young: Shaping a Genre Through Frequencies." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2839.

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Spectrogram analysis of the most popular works of Adam Young’s four major projects; Owl City, Sky Sailing, Port Blue, and The Score Project. Spectrograms reveal several elements separate to what waveforms can show, and better show elements like frequency saturation, frequency ranges, overtones, and timbral sections. All these elements also can be used to better describe the phenomenon of the Autonomous Sensory Meridian Response (ASMR) and can also be seen on a spectrogram. Because of the ability to see these different elements, a spectrogram provides a good vehicle to analyze and compare eleme

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Al-Darkazali, Mohammed. "Image processing methods to segment speech spectrograms for word level recognition." Thesis, University of Sussex, 2017. http://sro.sussex.ac.uk/id/eprint/71675/.

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The ultimate goal of automatic speech recognition (ASR) research is to allow a computer to recognize speech in real-time, with full accuracy, independent of vocabulary size, noise, speaker characteristics or accent. Today, systems are trained to learn an individual speaker's voice and larger vocabularies statistically, but accuracy is not ideal. A small gap between actual speech and acoustic speech representation in the statistical mapping causes a failure to produce a match of the acoustic speech signals by Hidden Markov Model (HMM) methods and consequently leads to classification errors. Cer

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Bergström, Joakim. "Transfer Learning on Ultrasound Spectrograms of Weld Joints for Predictive Maintenance." Thesis, Uppsala universitet, Signaler och system, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424726.

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A big hurdle for many companies to start using machine learning is that trending techniques need a huge amount of structured data. One potential way to reduce the need for data is taking advantage of previous knowledge from a related task. This is so called transfer learning. A basic description of it would be when you take a model trained on existing data and reuse that for another problem. The purpose of this master thesis is to investigate if transfer learning can reduce the need for data when faced with a new machine learning task which is, in particular, to use transfer learning on ultras

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TAECHAWATTANANANT, PASRAWIN. "Peak identification and quantification in proteomic mass spectrograms using non-negative matrix factorization." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/253496.

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京都大学<br>0048<br>新制・課程博士<br>博士(薬科学)<br>甲第22651号<br>薬科博第123号<br>新制||薬科||13(附属図書館)<br>京都大学大学院薬学研究科薬科学専攻<br>(主査)教授石濱泰, 教授緒方博之, 教授馬見塚拓, 教授山下富義<br>学位規則第4条第1項該当<br>Doctor of Pharmaceutical Sciences<br>Kyoto University<br>DFAM

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Truskinger, Anthony M. "Semi-automated annotation of environmental acoustic recordings." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/84543/8/Anthony_Truskinger_Thesis.pdf.

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Environmental sensors collect massive amounts of audio data. This thesis investigates computational methods to support human analysts in identifying faunal vocalisations from that audio. A series of experiments was conducted to trial the effectiveness of novel user interfaces. This research examines the rapid scanning of spectrograms, decision support tools for users, and cleaning methods for folksonomies. Together, these investigations demonstrate that providing computational support to human analysts increases their efficiency and accuracy; this allows bioacoustics projects to efficiently ut

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Carvalho, Kelly Cristiane Henschel Pobbe de. "Descrição fonético-acústica das vibrantes no português e no espanhol /." Assis : [s.n.], 2004. http://hdl.handle.net/11449/102467.

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Orientador: Rafael Eugenio Hoyos-Andrade<br>Banca: Adelaide Hercília P. Silva<br>Banca: Gisele Domingos do Mar<br>Banca: Mirian Therezinha da Matta Machado<br>Banca: Zilda Maria Zapparoli Castro Melo<br>Resumo: Neste trabalho observamos e contrastamos as realizações das consoantes chamadas vibrantes, no português e no espanhol, em diferentes contextos fônicos, do ponto de vista acústico. Para tanto, utilizamos o Multi-Speech, programa de análise de fala para Windows, produzido pela Kay Elemetrics, que possibilita o desenvolvimento das análises espectrográficas necessárias neste tipo de investi

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Carvalho, Kelly Cristiane Henschel Pobbe de [UNESP]. "Descrição fonético-acústica das vibrantes no português e no espanhol." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/102467.

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Made available in DSpace on 2014-06-11T19:32:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-03-02Bitstream added on 2014-06-13T20:42:48Z : No. of bitstreams: 1 carvalho_kchp_dr_assis.pdf: 17423514 bytes, checksum: 5a2ddc3e71ca7722c0a452d6131d37ce (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho observamos e contrastamos as realizações das consoantes chamadas vibrantes, no português e no espanhol, em diferentes contextos fônicos, do ponto de vista acústico. Para tanto, utilizamos o Multi-Speech, programa de análise de fala para Windows,

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Marques, Mário Dinis. "Aspetos de interpretação na música para saxofone na obra de Daniel Schnyder." Doctoral thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/12225.

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Refém de uma dicotomia na forma de tocar, o saxofone tem vindo desde a sua criação a percorrer um caminho de convergência num consequente estreitar de diferentes abordagens técnicas e interpretativas que definem quer a escola clássica quer o jazz. Com a multiplicação de géneros musicais e uma prolífera produção de compositores motivados para essa inclusão de géneros, torna-se fundamental definir em que medida e com que critérios, é também necessária uma atitude inclusiva de escolas, na técnica de execução interpretativa deste novo género. Através deste estudo deu-se provimento a essa necessida

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Pethiyagoda, Ravindra. "Mathematical and computational analysis of Kelvin ship wave patterns." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/101167/1/Ravindra_Pethiyagoda_Thesis.pdf.

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This thesis concerns the form of water wave patterns generated by an idealised ship moving steadily through still water. An efficient numerical scheme for computing these waves with much finer detail than ever before is developed, and the results are used to determine the effect that certain properties, such as the ship's speed and dimensions, have on ship wakes. Two features are used to characterise the ship wave: the ship's apparent wake angle, the half-angle of the characteristic v-pattern of a ship wave, and a spectrogram produced by applying time-frequency analysis to a cross-section of t

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Tyas, Luke Martin Graham. "The SALT HRS Spectrograph." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3492/.

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SALT HRS (Southern African Large Telescope High Resolution Échelle Spectrograph) is a high-resolution, high-efficiency spectrograph for the 11m SALT telescope in Sutherland, South Africa. The initial optical design work was performed at the University of Canterbury, New Zealand. Revisions to the concept, the mechanical design, manufacture, assembly and testing have been handled by the Centre for Advanced Instrumentation, at Durham University in the United Kingdom. SALT HRS is a fibre-fed echelle grating spectrograph with four operational modes: low-, medium- and high-resolution and high-stabi

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Pavlycheva, N. K., and M. A. Hassan. "Spectrographs for analyzing nanomaterials." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20724.

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The optical schemes of high numerical aperture spectrographs based on concave holographic diffraction gratings are described. A calculations of an optical schemes using flat field spectrograph method for analyzing the fluorescence of all kinds of Quantum dots in a wide range of wavelengths with spectral resolution of 6,3 nm are submitted. A special calculation of spectrographs for investigating CdSe/ZnS, InP Quantum dots with high resolution of 1 nm are given because of their wide uses. An experimental mounting for analyzing Raman scattering in carbon nanotubes is described. Experimenta

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Campbell, Richard S. "Development and integration of the NPS middle ultraviolet spectrograph with an extreme ultraviolet spectrograph." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26983.

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Lampert, Thomas. "Spectrogram track detection : an active contour algorithm." Thesis, University of York, 2010. http://etheses.whiterose.ac.uk/956/.

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In many areas of science, near-periodic phenomena represent important information within time-series data. This thesis takes the example of the detection of non-transitory frequency components in passive sonar data, a problem which finds many applications. This problem is typically transformed into the pattern recognition domain by representing the time-series data as a spectrogram, in which slowly varying periodic signals appear as curvilinear tracks. The research is initiated with a survey of the literature, which is focused upon research into the detection of tracks within spectrograms. An

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Burchill, William Carleton University Dissertation Engineering Electrical. "A novel speech spectrograph system." Ottawa, 1985.

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Behr, Michael K. "State-space multitaper spectrogram algorithms : theory and applications." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107033.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 63-67).<br>I present the state-space multitaper approach for analyzing non-stationary time series. Nonstationary time series are commonly divided into small time windows for analysis, but existing methods lose predictive pow

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Hansen, Vedal Amund. "Unsupervised Audio Spectrogram Compression using Vector Quantized Autoencoders." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264947.

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Despite the recent successes of neural networks in a variety of domains, musical audio modeling is still considered a hard task, with features typically spanning tens of thousands of dimensions in input space. By formulating audio data compression as an unsupervised learning task, this project investigates the applicability of vector quantized neural network autoencoders for compressing spectrograms – image-like representations of audio. Using a recently proposed gradient-based method for approximating waveforms from reconstructed (real-valued) spectrograms, the discrete pipeline produces list

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Wilken, Tobias. "Calibrating Astronomical Spectrographs with Frequency Combs." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-129033.

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Lemke, Ulrike. "Measurement uncertainties in fibre-coupled spectrographs." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3412/.

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The signal quality of ﬁbre-coupled spectrographs can be limited by the inherent properties of the optical ﬁbre. This is especially the case for applications that require high signal-to-noise performance and high spectral resolution. Examples include metallicity and age of star clusters, as well as investigations of Lyman-alpha absorbers. Extra-solar planet research in particular encounters its limitations due to the non-repeatability of the ﬁbre response. Initially, a limited signal quality due to ﬁbres seems counter-intuitive, since one of the most remarkable advantages of ﬁbres is their sign

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Aikio, Mauri. "Hyperspectral prism-grating-prism imaging spectrograph /." Espoo [Finland] : Technical Research Centre of Finland, 2001. http://www.vtt.fi/inf/pdf/publications/2001/P435.pdf.

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Biancalani, Enrico. "Towards a novel concept of imaging spectrograph." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14056/.

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L'obiettivo della presente tesi è di introdurre una nuova concezione di fotorivelatore astrofisico, in grado di analizzare immediatamente la composizione spettrale di immagini bidimensionali. Prima di tutto, la sua innovativa tecnologia, che si basa sull'effetto superconduttivo dell'induttanza cinetica, è confrontata con lo standard dei dispositivi semiconduttivi ad accoppiamento di carica. Essi contano sull'effetto fotoelettrico e possono solo percepire l'intensità della luce su un periodo d'esposizione, di per sé, senza elementi dispersivi o filtri monocromatici dinnanzi. In questo conte

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Huber, Nicolas. "Reconfigurable Hardware for the Correlating Electron Spectrograph." Thesis, University of Sussex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487931.

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This thesis describes an aspect of the operational and functional implementation of the CORES instrument, an electronion spectrograph to be flown aboard the Russian Obstanovka Experiment Complex mission to the ISS in 2008. For the phenomenon under investigation, wave-particle interactions in space plasma, CORES is ideally suited as it can accept a very wide band of energies simultaneously and at the same time have 3600 field-of-view. This instrument includes a novel delay-baSed particle readout system, . developed specifically for this application. A reconfigurable device (FPGA) lies at the he

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Dean, A. J. "CIRPASS : the Cambridge Infrared Panoramic Survey Spectrograph." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598467.

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The Cambridge Infrared Panoramic Survey Spectrograph, CIRPASS, is an infrared spectrograph that operates in the 0.9 to 1.8 <i>m</i>m wavelength region. CIRPASS was developed entirely at the Institute of Astronomy, Cambridge, and the design, construction and performance of CIRPASS are presented in this thesis. CIRPASS provides integral field spectroscopy (IFS). Spectra are simultaneously obtained from 499 contiguous spatial elements in a two-dimensional area of sky using an integral field unit (IFU). The construction of the IFU, which used a lenslet array and fibre optic bundle, is presented, a

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Stern, Paul-Eric. "Un système expert en lecture de spectrogrammes." Paris 11, 1986. http://www.theses.fr/1986PA112321.

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Malgré l’extrême variabilité du signal de parole, certains experts phonéticiens sont capables de déchiffrer une représentation visuelle de la parole, le spectrogramme, avec de meilleures performances que les systèmes actuels de reconnaissance de la parole. La maîtrise de cette expertise présente un intérêt capital pour le décodage acoustico-phonétique et l’usage de techniques d’intelligence artificielle semble approprié à la résolution de ce type de problèmes. Nous présentons un système expert permettant de modéliser le raisonnement d’un expert phonéticien. Le système raisonne à partir d’indic

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Stern, Paul-Eric. "Un Système expert en lecture de spectrogrammes." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37601373n.

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Kotte, Timo Oliver. "Application of Image Processing Techniques for Lamb Wave Characterization." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4787.

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Characterization of dispersion curves in plate-like structures is possible with guided Lamb waves. In this research, experimental development of dispersion curves relies on the spectrogram, which suffers from the Heisenberg Uncertainty Principle. Reassignment is capable of localizing ill--defined dispersion curves. Unfortunately, reassignment also introduces spurious components, which reduce reassignment performance. This research develops an algorithm that provides both localization of dispersion curves and elimination of spurious components. To achieve this, an alternative formulation of rea

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Albert, Florea George, and Filip Weilid. "Deep Learning Models for Human Activity Recognition." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20201.

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AMI Meeting Corpus (AMI) -databasen används för att undersöka igenkännande av gruppaktivitet. AMI Meeting Corpus (AMI) -databasen ger forskare fjärrstyrda möten och naturliga möten i en kontorsmiljö; mötescenario i ett fyra personers stort kontorsrum. För attuppnågruppaktivitetsigenkänninganvändesbildsekvenserfrånvideosoch2-dimensionella audiospektrogram från AMI-databasen. Bildsekvenserna är RGB-färgade bilder och ljudspektrogram har en färgkanal. Bildsekvenserna producerades i batcher så att temporala funktioner kunde utvärderas tillsammans med ljudspektrogrammen. Det har visats att inkluder

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Radley, Alan Stuart. "New advances in optical design for astronomical spectrographs." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321567.

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Zieleniewski, Simon. "Science with integral field spectrographs present and future." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:53b2f52e-f42c-4635-aaa2-e88660e29202.

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In the first part of this thesis we use the Oxford Short Wavelength Integral Field spec- Trograph (SWIFT) to trace radial variations of initial mass function (IMF) sensitive stellar absorption features in several galaxies. We observe M31 and M32, the two massive Coma brightest cluster galaxies (BCGs), NGC4889 and NGC4874, and the BCG in the Coma south-west cluster NGC4839. We measure equivalent widths of the sodium NaI ?8190 doublet, calcium triplet CaT ?8498, 8542, 8662 and Wing-Ford band FeH ?9916. In M31 we find a strong NaI gradient within the central 10 arcsec (38 pc) in contrast to a at

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Lombardo, Simona. "A flux calibration device for Integral Field Spectrographs." Doctoral thesis, Humboldt-Universität zu Berlin, 2017. http://dx.doi.org/10.18452/18054.

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SNe Ia können als Standardkerzen verwendet werden, um den Zustandsparameter der dunklen Energie w zu messen. Nachdem viele SN Ia beobachtet wurden, wird die Genauigkeit aktueller Studien durch systematische Fehler beschränkt, wobei die Flusskalibrierung (in Wellenlänge) die dominierende Fehlerquelle ist. In dieser Arbeit wird eine Möglichkeit präsentiert, das Problem mit dem “SNIFS Calibration Apparatus” (SCALA) zu lösen oder wenigstens zu verringern. Das Ziel von SCALA ist es, dass System aus Teleskop und SNIFS mit hoher Genauigkeit zu kalibrieren und diese Kalibration auf das Standardstern

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Welsh, Frederick V. "Scientific application of the Santa Barbara instrument group self-guided spectrograph." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1295146.

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The Santa Barbara Instrument Group self-guided spectrograph is aimed primarily at the advanced amateur astronomer. This study has determined that this instrument is capable of being used for scientific research. A comparison lamp box was built to be used in conjunction with the spectrograph. A test was conducted to determine the accuracy of the grating positioning micrometer. A chart was created to allow the conversion of the micrometer readings to correlate with the position of the low-dispersion grating. To determine the scientific applicability of the spectrograph, it was used to: (1) measu

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Doerr, Hans-Peter [Verfasser], and Wolfgang [Akademischer Betreuer] Schmidt. "Precision spectroscopy with a frequency-comb-calibrated solar spectrograph." Freiburg : Universität, 2016. http://d-nb.info/1120020719/34.

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Salter, Graeme S. "High contrast limitations of slicer based integral field spectrographs." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:de6d946d-063f-4568-8615-ea5154ac5909.

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The viability of using a slicer based integral field spectrograph (IFS) for high contrast observations has been under scrutiny due to the belief that the one dimensional coherence that persists along the slice to the point of sampling at the detector will cause the creation of secondary speckles that will not have the same characteristics as normal speckles, thus stopping us from calibrating them out. It has also been previously assumed that a suitably low differential wavefront error when moving slice to slice was not guaranteed by design. It was for these reasons that slicer based IFSs were

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Lamel, Lori Faith. "Formalizing knowledge used in spectrogram reading : acoustic and perceptual evidence from stops." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14780.

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Harsten, Joel. "Designing a Spectrograph for Observation of Microparticles in the Ionosphere." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153799.

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In this report the development of a spectrograph for confirming the size of the particles in a particle cloud is described. With the wavelength dependency of Mie-scattering, it can be determined if the particles are of the desired size. There is a significant trade-off effect between size and resolution of an optical system. The spherical aberrations that arise due to the focal length being short compared to the lens diameter are reduced by using lens combinations called achromatic doublets, both as collimating and focusing lenses. The manufactured spectrograph has a resolution of about 10 nm

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Kilburn, Lilia Maud. "Answering machine, auto-tune, spectrograph : queer vocality through sonic technology." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106760.

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Thesis: S.M. in Comparative Media Studies, Massachusetts Institute of Technology, Department of Humanities, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 113-121).<br>In academic and activist contexts, "voice" has long served as shorthand for inclusion, empowerment, and the like, occasioning bromides about having or not having a voice, giving voice to the voiceless, breaking the silence, and speaking truth to power. Such metaphysically inflected phrasings often serve to reinforce a binary between sound and silence at the expense of attending to ot

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Hymas, Hewitt M. "A calibration of the Naval Postgraduate School middle ultraviolet spectrograph and an analysis of the OII 2470 Å emission obtained by the middle ultraviolet spectrograph /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283449.

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Hymas, Hewitt M. "A calibration of the Naval Postgraduate School middle ultraviolet spectrograph and an analysis of the OII 2470 ΩA emission obtained by the middle ultraviolet spectrograph". Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/28021.

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The NPS middle ultraviolet spectrograph, MUSTANG, instrument was tested using standard techniques to determine the wavelength calibration and overall sensitivity. The instrument was launched on March 10, 1994 on a NASA sounding rocket from Poker Flats, Alaska. Post-flight calibration indicates the wavelength calibration did not change as a result of the launch and no significant change in the sensitivity calibration. Ultraviolet dayglow spectra of the earth's ionosphere from 1800 A to 3400 A were obtained during a similar launch on March 19, 1992 from White Sands Missile Range, New Mexico. Dat

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Porter, Martin John. "A CCD camera system for use in echelle spectroscopy /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17953.pdf.

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Masters, Richard John. "Characterising KMOS and scaling relations in the rich cluster MS0451.6-0305." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:144317cf-cdae-459e-97e8-aa048c0ae9dd.

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This Thesis contains two parts. Part I details my work on KMOS, a new instrument for the VLT and Part II details my research on scaling relations for the massive galaxy cluster MS0451.6-0305. Part I: The K-Band Multi-Object Spectrograph (KMOS) is a new near infra-red (NIR) instru- ment to be installed at the Very Large Telescope (VLT). KMOS is capable of spatially resolved kinematics via 24 deployable integral field units (IFUs), each with a 2.8′′ field of view. I describe my contribution to the construction and optical characterisation of the spectrograph modules and instrument as a whole. Pa

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Chase, Bruce E. Cleary David D. "A calibration of the Naval Postgraduate School Middle Ultraviolet Spectrograph (MUSTANG)." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School; Available from the National Technical Information Service, 1992. http://handle.dtic.mil/100.2/ADA257323.

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Wilken, Tobias [Verfasser], and Theodor [Akademischer Betreuer] Hänsch. "Calibrating Astronomical Spectrographs with Frequency Combs / Tobias Wilken. Betreuer: Theodor Hänsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2010. http://d-nb.info/1015734472/34.

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Cvetojevic, N., N. Jovanovic, S. Gross, et al. "Modal noise in an integrated photonic lantern fed diffraction-limited spectrograph." OPTICAL SOC AMER, 2017. http://hdl.handle.net/10150/626070.

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In an attempt to develop a streamlined astrophotonic instrument, we demonstrate the realization of an all-photonic device capable of both multimode to single mode conversion and spectral dispersion on an 8-m class telescope with efficient coupling. The device was a monolithic photonic spectrograph which combined an integrated photonic lantern and an efficient arrayed waveguide grating device. During on-sky testing, we discovered a previously unreported type of noise that made spectral extraction and calibration extremely difficult. The source of the noise was traced to a wavelength-dependent l

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Harris, Walter M., Kevin C. France, Brian T. Fleming, et al. "The LUVOIR Ultraviolet Multi-Object Spectrograph (LUMOS): instrument definition and design." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/626500.

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The Large Ultraviolet/Optical/Infrared Surveyor (LUVOIR) is one of four large mission concepts currently undergoing community study for consideration by the 2020 Astronomy and Astrophysics Decadal Survey. LUVOIR is being designed to pursue an ambitious program of exoplanetary discovery and characterization, cosmic origins astrophysics, and planetary science. The LUVOIR study team is investigating two large telescope apertures (9- and 15-meter primary mirror diameters) and a host of science instruments to carry out the primary mission goals. Many of the exoplanet, cosmic origins, and planetary

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Barnes, Stuart. "The design and performance of high resolution échelle spectrographs in astronomy." Thesis, University of Canterbury. Physics and Astronomy, 2004. http://hdl.handle.net/10092/5576.

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The design and performance of several high resolution spectrographs for use in astronomy will be described. After a basic outline of the required theory, the design and performance of HERCULES will be presented. HERCULES is an R2 spectrograph fibre-fed from the MJUO 1-m telescope. The échelle grating has 31.6 grooves/mm and it uses a BK7 prism with a 50° apex angle in double-pass for cross-dispersion. A folded Schmidt camera is used for imaging. With a detector having an area 50 x 50 mm, and pixels less than 25 µm, HERCULES is capable of resolving powers of 40,000 to 80,000 and wavelength cove

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Chase, Bruce E. "A calibration of the Naval Postgraduate School Middle Ultraviolet Spectrograph (MUSTANG)." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/38504.

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Approved for public release; distribution is unlimited.<br>The Naval Postgraduate School's Middle Ultraviolet Spectrograph (MUSTANG) was designed to measure the spectrum of the Earth's airglow from 1800 A to 3400 A. The MUSTANG instrument was tested using standard techniques to determine the wavelength calibration, overall sensitivity, and detector linearity. The instrument was launched on a NASA sounding rocket on March 19, 1992, from White Sands Missile Range N.M. Post-flight tests indicate that the calibration did not change as a result of the rocket experiment.

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Quint, John H. "Development of an NPS Middle Ultraviolet Spectrograph (MUSTANG) electronic interface package." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/25847.

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Ohkawa, Hana. "Determination of spectral sensitivity of a vacuum ultraviolet, grazing incidence spectrograph." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43927.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1997, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.<br>Includes bibliographical references (leaf 79).<br>by Hana Ohkawa.<br>M.S.

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Rains, Adam D., Michael J. Ireland, Nemanja Jovanovic, et al. "Precision single mode fibre integral field spectroscopy with the RHEA spectrograph." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622808.

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The RHEA Spectrograph is a single-mode echelle spectrograph designed to be a replicable and cost effective method of undertaking precision radial velocity measurements. Two versions of RHEA currently exist, one located at the Australian National University in Canberra, Australia (450 - 600nm wavelength range), and another located at the Subaru Telescope in Hawaii, USA (600 - 800 nm wavelength range). Both instruments have a novel fibre feed consisting of an integral field unit injecting light into a 2D grid of single mode fibres. This grid of fibres is then reformatted into a 1D array at the i

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