Dr. James W. Bergstrom Profile

Dr. James W. Bergstrom

Principal Engineer at BAE Systems Inc

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Author

Publications (5)

Proceedings Article | 17 September 2007 Paper

Mission to Mars: the HiRISE camera on-board MRO

Thomas Ebben, James Bergstrom, Peter Spuhler, Alan Delamere, Dennis Gallagher

Proceedings Volume 6690, 66900B (2007) https://doi.org/10.1117/12.739930

KEYWORDS: Mars Reconnaissance Orbiter, Mars, Cameras, Space operations, Image resolution, Charge-coupled devices, Mirrors, Staring arrays, Aerospace engineering, Signal to noise ratio

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Following its launch in August, 2005 and a year of interplanetary cruise and aero-braking, the successful Mars Reconnaissance Orbiter (MRO) mission is currently orbiting Mars and down-linking imagery from the High Resolution Imaging Science Experiment (HiRISE) camera. The primary objectives of the MRO mission are to characterize the present climate of Mars, look for evidence of water-related activities, and characterize potential landing sites. After only four months in the Primary Science Phase (PSP) of the mission, MRO has returned more data than any other previous Mars mission. Approximately one-third of this data volume is from the HiRISE camera, built by Ball Aerospace & Technologies Corporation (BATC), for the University of Arizona (UofA), Department of Planetary Sciences. With a 0.5-meter primary mirror, the HiRISE instrument includes the largest optical telescope ever sent beyond Earth's orbit, and is producing images with unprecedented resolution. It has detected objects of less than one meter size from the nominal orbit of 250 x 320 km. The highest resolution images have a scale of 25 to 32 cm per pixel (1.0 microradian IFOV). HiRISE is a "push-broom" camera with a swath width of 6 km in a broad red spectral band and 1.2 km in blue-green and near infrared bands. There are 14 CCD detector chips (2048 x 128 TDI elements each) on the focal plane. The HiRISE camera was designed to minimize use of spacecraft resources. Even with a half-meter primary mirror, through the use of lightweight glass optics and graphite-composite structures the final mass of the instrument is only 64.2 kg. It maintains a nearly uniform telescope temperature of 20°C yet its orbital average power consumption is less than 60 W. An overview is given of the NASA MRO mission and the HiRISE instrument. Pre-launch activities are detailed and the launch time discussed. An account is given of the cruise events, along with a description of aerobraking and the primary science phase. A sample of science results are presented, including a wealth of imagery.

Proceedings Article | 26 August 2005 Paper

Overview of the optical design and performance of the high resolution science imaging experiment (HiRISE)

Dennis Gallagher, Jim Bergstrom, Joe Day, Bryan Martin, Timothy Reed, Peter Spuhler, Scott Streetman, Mark Tommeraasen

Proceedings Volume 5874, 58740K (2005) https://doi.org/10.1117/12.618539

KEYWORDS: Mirrors, Mars, Image resolution, Cameras, Optical design, Sensors, Telescopes, Optical alignment, Mars Reconnaissance Orbiter, Space telescopes

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Proceedings Article | 30 January 2002 Paper

SIRAS, the Spaceborne Infrared Atmospheric Sounder: an approach to next-generation infrared spectrometers for Earth remote sensing

Thomas Kampe, Thomas Pagano, James Bergstrom

Proceedings Volume 4485, (2002) https://doi.org/10.1117/12.454236

KEYWORDS: Spectrometers, Infrared radiation, Collimators, Infrared spectroscopy, Infrared sensors, Infrared imaging, Cameras, Atmospheric optics, Aerospace engineering, Spectral resolution

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Proceedings Article | 29 June 1992 Paper

Functional test and calibration plan for the lightning imaging sensor

James Bergstrom, John Jackson, David Simmons, Hugh Christian

Proceedings Volume 1745, (1992) https://doi.org/10.1117/12.60614

KEYWORDS: Calibration, Lithium, Sensors, Signal processing, Monochromators, Semiconductor lasers, Signal detection, Space operations, Data acquisition, Optical sensors

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Proceedings Article | 1 May 1990 Paper

Diffraction efficiency of binary optical elements

J. Allen Cox, Thomas Werner, James Lee, Scott Nelson, Bernard Fritz, James Bergstrom

Proceedings Volume 1211, (1990) https://doi.org/10.1117/12.17953

KEYWORDS: Diffraction, Optical components, Fourier theory, Binary data, Photomasks, Etching, Holography, Mathematical modeling, Zone plates, Diffraction gratings

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