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.
Results
Showing 1 to 17 of 17 for “"error budget"”.
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Hybrid inkjet and direct-write multi-material additive manufacturing
… syringe tool holder is completed. An error budget employing Homogeneous Transformation Matrices was maintained to estimate the tooltip errors. In order to register these two non-contact printing processes, a unique approach to their registration to a common global origin was necessary. …
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Accuracy Improvement of Terrestrial Mobile Lidar System in Engineering Surveys
… of engineering surveys. A detailed analysis for error budget of the terrestrial mobile LiDAR system has been presented in order to well interpret the effects of individual error sources. Firstly, the 3D conformal coordinate transformation (3DCCT) through Least Squares Method (LSM) was applied by …
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Development of an automated alignment system for the Magdalena Ridge Observatory Interferometer
… for meeting this sensitivity goal because errors in beam angle and position would provoke fringe visibility loss in interferometric measurements. The top-level error budget for the MROI defines a tight alignment tolerance: every beam must overlap with the nominal optical axis within 15 …
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Designing a beam combiner for faint limiting magnitudes in optical interferometry
… including the alignment and manufacturing error budget, limiting magnitude estimation, spectral resolution and modelling of thermal effects on cooling the instrument to its liquid nitrogen operating temperature. The cryogenic optomechanics are described as well as a series of laboratory …
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Design and qualification of an absolute thickness measuring machine
… thickness measuring machine. It focuses on the error budget and tests performed to qualify the machine. Without compensation factors, the absolute thickness measuring machine was able to measure the thickness of a gage block to 0.5 [mu]m.
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Atmospheric delay modeling for satellite laser altimetry
… need to be validated. Of particular concern are errors in the delay estimates that have the same characteristics as the expected mass balance variations. The main focus of this dissertation is to formulate algorithms for calculating the ICE-Sat atmospheric delay and estimate the expected delay …
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Investigation into a GPS time pulse radiator for testing time-stamp accuracy of a radio telescope
… critical hardware in order to reduce the GTR’s error budget.
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Large scale oceanic circulation and fluxes of freshwater, heat, nutrients and oxygen
… dianeutral fluxes between layers. A detailed error budget permits calculation of statistical uncertainties, taking into account both the non-resolved part of the solution and the systematic errors due to the temporal oceanic variability. The estimated water mass transports during the WOCE …
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Large scale oceanic circulation and fluxes of freshwater, heat, nutrients and oxygen
… dianeutral fluxes between layers. A detailed error budget permits calculation of statistical uncertainties, taking into account both the non-resolved part of the solution and the systematic errors due to the temporal oceanic variability. The estimated water mass transports during the WOCE …
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Discrete cellular lattice assembly
… rates are ultimately dependent on allowable error, system stiffness, and damping characteristics. Vibrations due to cyclical motions of the end-effector, locomotion system, and the dynamic response of an incrementally varying lattice must settle to acceptable ranges to enable engagement …
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Analysis of interferometric SAR for topographic mapping
… expressions needed to calculate the height error budget are presented. A model is developed to calculate absolute terrain elevations incorporating ground control data. The computation procedure is based on stereo radargrammetric mapping of overlapping SAR images, incorporating expressions …
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AN APPROACH TO ESTIMATE GLOBAL BIOMASS BURNING EMISSIONS OF ORGANIC AND BLACK CARBON FROM MODIS FIRE RADIATIVE POWER
… warming effect of green house gas emissions. An error budget was developed to explore the sources and total uncertainty in the OCBC estimation. The results yielded an uncertainty value of 58% with specific components of the process warranting future consideration and improvement. The uncertainty …
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Hierarchical Bayesian Spectro-temporal Models of Type Ia Supernovae in the Optical and Near-Infrared: Understanding the Properties of Dust in Supernova Host Galaxies
… of systematic uncertainty that will dominate the error budget of these future experiments. In this thesis, I develop and deploy a robust new hierarchical Bayesian framework for modelling the spectral energy distributions (SEDs) of SNe Ia in the optical and near-infrared (NIR). I apply this …
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Optimizing The Performance Of As-manufactured Grazing Incidence X-ray Telescopes Using Mosaic Detector Arrays
… effects from residual optical fabrication errors are another major source of image degradation. The fabrication of precision optical surfaces for grazing incidence X-ray telescopes thus poses a great technological challenge. Both the residual "figure" errors and the residual microroughness …
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Sensitivity Analysis of the Forest Vegetation Simulator Southern Variant (FVS-Sn)for Southern Appalachian Hardwoods
The FVS-Sn model was developed by the USDA Forest Service to project and report forest growth and yield predictions for the Southern United States. It is able to project forest growth and yield for different forest types and management prescriptions, but it is a relatively new, complex, and …
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A Study on Unintentional and Intentional Sources of Variability in Nanometer Scale Digital Circuits
… are tremendously susceptible to inadvertent errors, and circuit modifications required to ensure error resilience incur significant power overheads that are growing alarmingly as transistor dimensions shrink. Technology scaling has thus caused a resounding effect on the performance of digital …
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Validation, trend analysis & bias reduction through satellite fusion of the cloud-top height record from terra MODIS & MISR
… climate, we quantified the MISR and MODIS CTH error characteristics vis-à-vis cloud geometrical and optical properties, through the first direct, semi-global comparison against a space-based lidar (ISS-CATS). We establish that MISR and MODIS records of CTH are highly accurate and precise for …