Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 135 for “"Space telescope"”.
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Optomechanical Design of a Space Telescope Primary Mirror
… mirror is the most critical component of a space-borne telescope. The size of the primary mirror is the main driver for the resolution of the telescope. A high resolution telescope requires a larger primary mirror with the high-precision requirement of deformation due to space thermal loads, …
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Design and optimization of lightweight space telescope structures
… deeper into the universe, increasingly larger space telescopes will be needed to achieve the levels of resolution required to perform these missions. Due to this increase in size, increasing emphasis will be placed on designing lightweight, efficient structures in order to reduce structural …
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Meteoroid damage to a large space telescope mirror
Thesis. 1976. B.S.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Astronomers and the Hubble space telescope: an historical analysis
In this thesis I describe a period in the Hubble Space Telescope's history during which a relatively small number of astronomers worked to encourage their colleagues to support the telescope project. I analyze astronomers' behavior in terms of the various problems which they faced. I argue that …
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Towards the Advancement of Rotating Synthetic Aperture Space Telescope Technology
Optical imagery of the Earth from space-based telescopes is one of the most valuable tools for understanding various large and small-scale processes. Value is derived from the unique observing perspective on orbit, which has enabled an expansive list of new science from the discovery of the ancient …
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Minimizing high spatial frequency residual in active space telescope mirrors
The trend in future space telescopes is towards large apertures and lightweight, rib-stiffened, and actively controlled deformable mirrors. These mirror architectures permit the development of segmented and deployed primary mirrors that lead to tremendous advancement in space telescope performance. …
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Integrated modeling and dynamics simulation for the next generation space telescope
The Next Generation Space Telescope (NGST) represents a challenging problem from the point of view of maintaining a milli-arcsecond level pointing accuracy and diffraction limited wavefront performance in the presence of dynamic onboard disturbances during science observations. This is due to the …
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Stellar occultation studies of Saturn's rings with the Hubble Space Telescope
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
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Minimizing actuator-induced residual error in active space telescope primary mirrors
Heritage space telescope mirror technology-i.e. large, monolithic glass primary mirrors-has reached an upper limit on allowable aperture diameter given launch vehicle volume and mass constraints. The next generation of space telescopes will feature lightweight, actively controlled, segmented …
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Deployment and on-orbit shape modifications for a large space telescope using magnetostriction
The Hubble Space Telescope, with its 2.4-m primary mirror, enabled notable scientific progress and discoveries, like for instance the acceleration of the expansion of the universe. Twenty-six years later, NASA is about the launch the next generation of space telescopes, namely the James Webb Space …
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Bayesian atmospheric retrieval for exoplanets : uniqueness of exoplanet spectra, characterizations of super-earths, and evaluations of dedicated space telescope designs
… the science case for the largest Hubble Space Telescope program ever awarded for a single exoplanet. The numerical methods and the conceptual understanding of atmospheric spectra presented in this thesis are key for the design of future space telescopes dedicated to the characterization …
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Spectral measurements of hydrogen Lyman-alpha in the atmospheres of Venus and Jupiter using a sounding rocket and the Hubble Space Telescope
… formation. The measurement will be made using a telescope with a spectrograph launched on a sounding rocket scheduled for launch in early 2012 from White Sands Missile Range. On Jupiter, the Lyman-alpha emission was observed to better characterize an anomalously bright region near the equator …
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Analysis of Molecular Variability Due to Accretion Bursts in the Protoplanetary Disk of Ex Lup as Observed with the James Webb Space Telescope
… study the postburst evolution. Using James Webb Space Telescope Mid-Infrared Instrument (MIRI) Cycle 1 programs GO-2209 and GO-4427 (PI: Peter Ábrahám, Co-I: Andrea Banzatti), mid-IR observations of EX Lup after the 2008 outburst were conducted in August 2022 and April 2023, following a March …
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Mass and Distance Estimation Simulations for the Nancy Grace Roman Space Telescope Using PyLIMASS and a Case Study on Intellectual Property Frameworks in Space Collaborations
… radial velocity methods. The Nancy Grace Roman Space Telescope will carry out the Galactic Exoplanet Survey to detect thousands of microlensing events with the cadence and precision necessary for statistical exoplanet population studies. To verify Roman’s ability to meet its core science …
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A decision-making framework to determine the value of on-orbit servicing compared to replacement of space telescopes
The Hubble Space Telescope has demonstrated that on-orbit servicing can provide significant benefits for scientific space programs. Specifically, servicing missions can replace failed components to keep spacecraft operational, and can upgrade onboard components to improve spacecraft performance. …
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Characterizing Exoplanet Atmospheres: From Light-curve Observations to Radiative-Transfer Modeling
… of transiting exoplanet data. I analyzed space-telescope data for three planets to characterize their atmospheres and refine their orbits, investigated correlated noise estimators, and contributed to the development of the respective data-analysis pipelines. Chapters 2 and 3 describe the …
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Starbursts in the UV bright interacting galaxies NGC 3395 and NGC 3396
… the interacting galaxies, NGC 3395/6, using the Space Telescope Imaging Spectrograph (STIS) on Hubble Space Telescope (HST). The images show many isolated sources of ultraviolet emission which are young star forming regions with ages ≤8 x 107 years. Reddening of the star forming knots ranges …
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Design and shape control of lightweight mirrors for dynamic performance and athermalization
The next generation of space telescopes will need to meet increasingly challenging science goals. For these new systems to meet resolution goals, the collecting area of the primary mirror will need to be increased. However, current space telescope designs are reaching their limits in terms of size …
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Considerations for space and Naval aircraft applications of ferroelectric memory
… memory and discuss considerations for possible space and Naval aviation applications. Ferroelectric memory's characteristics and basic mechanism are discussed. A broad spectrum of existing computer memory types are presented for comparison. The memory requirements of Space Shuttle, Landsat, …
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Exoplanetary Systems in Technicolor
… afforded by instruments such as the James Webb Space Telescope. With increased precision, longer baselines of observation, and access to multi-instrument data sets, the study of exoplanets has reached a level of detail never before possible. In this thesis, I focus on the analysis of several …
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