Optical design of a thermal infrared imager for a micro-satellite

Salçın, Esen
Space-based infrared Earth observation systems provide a unique opportunity for the detection of thermal variations on Earth’s surface or atmosphere. The objective of this study is to propose an optical design of a thermal imager that is suitable for flight on a micro-satellite platform at an altitude of 650 km, providing the necessary resolution requirements under the considerations of physical boundaries of the given platform. Before the optical design, the parameters which would strictly bound the optical system such as the infrared source, atmospheric transmission, the detector and optical materials for infrared as well as the working conditions for the microsatellite were examined. Simulations and further optimization efforts resulted with a high performance optical system design.


Offshore oil slick detection with remote sensing techniques
Akar, Sertaç; Süzen, Mehmet Lütfi; Department of Geological Engineering (2007)
The aim of this thesis is to develop a methodology for detection of naturally occurring offshore oil slicks originating from hydrocarbon seeps using satellite remote sensing techniques. In this scope, Synthetic Aperture Radar (SAR) imagery has been utilized. Case study area was Andrusov High in the Central Black Sea. Hydrocarbon seepage from tectonic or stratigraphic origin at the sea floor causes oily gas plumes to rise up to the sea surface. They form thin oil films on the sea surface called oil slicks. P...
Mechanical characterization of filament wound composite tubes by internal pressure testing
Karpuz, Pınar; Ankara, Osman Alpay; Department of Metallurgical and Materials Engineering (2005)
The aim of this study is to determine the mechanical characteristics of the filament wound composite tubes working under internal pressure loads, generating data for further investigation with a view of estimating the remaining life cycle of the tubes during service. Data is generated experimentally by measuring the mechanical behavior like strains in hoop direction, maximum hoop stresses that are formed during internal pressure loading. Results have been used to identify and generate the necessary data to ...
Park, Seul-Hyun; Choi, Mun Young; Yozgatlıgil, Ahmet (Informa UK Limited, 2009-01-01)
The nanostructure of soot particles collected from spherically symmetric ethanol droplet flames were analyzed using a high resolution transmission electron microscopy (HRTEM). Nanostructure properties, including fringe length and curvature of carbon lamellae, were measured for soot particles collected in various inert environments. The sampling experiments were performed in the reduced gravity environments produced in the NASA 2.2 sec Droptower at the Glenn Research Center in Cleveland, Ohio. Microgravity d...
SARIKAYA, M; OZBAYOGLU, G (Elsevier BV; 1990-01-01)
Electrokinetic measurements were carried out in order to determine the properties of oxidized coal surfaces over a wide pH range both in the presence and absence of various metal ions and flotation collectors. It was found that polyvalent cations, such as Fe++, Fe+++ and Al+++ decreased the zeta potential to zero and then reversed the charge. In the presence of cationic collectors, the negative value of zeta potential of oxidized coal was driven positive, below 9.3 to 10.9 depending on the type and concentr...
Statistical analysis of solar radiation data
Yilmaz, E.; Cancino, B.; Parra, W. R. (Informa UK Limited, 2007-01-01)
Solar radiation is the most important parameter in the design and study of solar energy conversion devices. The present work is based on statistical analysis of solar radiation data for the city of Valparaiso in the coast region of Chile. Experimental data were obtained from the Santa Maria University in Valparaiso over a five-year period measured by the actinograph and the pyranometer. The error between the actinography values in relation to the pyranometer ones was determined. The most frequent error perc...
Citation Formats
E. Salçın, “Optical design of a thermal infrared imager for a micro-satellite,” M.S. - Master of Science, Middle East Technical University, 2006.