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Terrence S. Lomheim
The Aerospace Corporation
42Publications
11H-index
389Citations
Publications 42
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#1Lubo Jocic (The Aerospace Corporation)H-Index: 2
#2Ronald R. Herm (The Aerospace Corporation)H-Index: 3
Last.Thomas L. Hayhurst (The Aerospace Corporation)H-Index: 2
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From its inception over fifty years ago, The Aerospace Corporation has been supporting government decision making with objective technical analysis performed by subject matter experts using many tools, models, and evaluation processes. Strong customer demand for timely analysis and advances in modeling capabilities have motivated the integration of fast, concurrent, engineering processes into what is now defined as the Decision Support Framework (DSF). The open-model DSF employs a layered approa...
#1Steve A. Cota (The Aerospace Corporation)H-Index: 5
#2Terrence S. Lomheim (The Aerospace Corporation)H-Index: 11
Last.Robert A. Keller (The Aerospace Corporation)H-Index: 3
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In a previous paper in this series, we described how The Aerospace Corporation's Parameterized Image Chain Analysis & Simulation SOftware (PICASSO) tool may be used to model space and airborne imaging systems operating in the visible to near-infrared (VISNIR). PICASSO is a systems-level tool, representative of a class of such tools used throughout the remote sensing community. It is capable of modeling systems over a wide range of fidelity, anywhere from conceptual design level (where it can ser...
#1Steve A. Cota (The Aerospace Corporation)H-Index: 5
#2Jabin T. Bell (The Aerospace Corporation)H-Index: 1
Last.Terrence S. Lomheim (The Aerospace Corporation)H-Index: 11
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The design of any modern imaging system is the end result of many trade studies, each seeking to optimize image quality within real world constraints such as cost, schedule and overall risk. Image chain analysis - the prediction of image quality from fundamental design parameters - is an important part of this design process. At The Aerospace Corporation we have been using a variety of image chain analysis tools for many years, the Parameterized Image Chain Analysis & Simulation SOftware (PICASS...
#1Thomas J. Grycewicz (The Aerospace Corporation)H-Index: 4
#2Steve A. Cota (The Aerospace Corporation)H-Index: 5
Last.Linda S. Kalman (The Aerospace Corporation)H-Index: 3
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In this paper we model sub-pixel image registration for a generic earth-observing satellite system with a focal plane using two offset time delay and integrate (TDI) arrays in the focal plane to improve the achievable ground resolution over the resolution achievable with a single array. The modeling process starts with a high-resolution image as ground truth. The Parameterized Image Chain Analysis & Simulation Software (PICASSO) modeling tool is used to degrade the images to match the optical tr...
#1Jonathan D. Bray (The Aerospace Corporation)H-Index: 2
#2Kevin M. Gaab (The Aerospace Corporation)H-Index: 7
Last.Terrence S. Lomheim (The Aerospace Corporation)H-Index: 11
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An improved and optimized spectral spot-scanning system for visible focal plane array (FPA) sub-micron pixel photoresponse testing is presented. This updated configuration includes: (1) additional diagnostic analysis tools which more completely characterize the operation of the system; (2) a confocal microscope fitted into the optical system to aid in more precise determination of spot focusing on the imager; (3) a post-acquisition transformation to imager pixel response data to reduce overall d...
#1Jonathan D. Bray (The Aerospace Corporation)H-Index: 2
#2Lee W. Schumann (The Aerospace Corporation)H-Index: 4
Last.Terrence S. Lomheim (The Aerospace Corporation)H-Index: 11
view all 3 authors...
We have measured the pixel response and derived the spectral modulation transfer function (MTF) of a front-side illuminated complementary-metal-oxide-semiconductor (CMOS) focal plane array at wavelengths of 440, 544, 633, and 905 nanometers using a spot scanning technique. The spot scanning apparatus utilized a confocal microscope configuration with a spot diameter about 1.4 μm (wavelength dependent) to scan the CMOS imager 9-μm pixel pitch in 0.5-μm steps. The confocal microscope had a magnific...
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