Dr. Hongwoo Park Profile

Dr. Hongwoo Park

Retired

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 12 October 2004 Paper

Detectors for the James Webb Space Telescope near-infrared spectrograph

Bernard Rauscher, Donald Figer, Michael Regan, Torsten Boeker, James Garnett, Robert Hill, Giorgio Bagnasco, Jesus Balleza, Richard Barney, Louis Bergeron, Clifford Brambora, Joe Connelly, Rebecca Derro, Michael DiPirro, Christina Doria-Warner, Aprille Ericsson, Stuart Glazer, Charles Greene, Donald Hall, Shane Jacobson, Peter Jakobsen, Eric Johnson, Scott Johnson, Carolyn Krebs, Danny Krebs, Scott Lambros, Blake Likins, Sridhar Manthripragada, Robert Martineau, Ernie Morse, Samuel Moseley, D. Brent Mott, Theo Muench, Hongwoo Park, Susan Parker, Elizabeth Polidan, Robert Rashford, Kamdin Shakoorzadeh, Rajeev Sharma, Paolo Strada, Augustyn Waczynski, Yiting Wen, Selmer Wong, John Yagelowich, Monica Zuray

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.549573

KEYWORDS: Sensors, James Webb Space Telescope, Staring arrays, Calibration, Spectrographs, Readout integrated circuits, Electronics, Detector development, Clocks, Mercury cadmium telluride

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Proceedings Article | 12 October 2004 Paper

Slit function measurements of an imaging spectrograph using Fourier transform techniques

Hongwoo Park, Bruce Swinyard, Peter Jakobsen, Samuel Moseley, Matthew Greenhouse

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552285

KEYWORDS: Spectroscopy, Fourier transforms, Sensors, Spectrographs, Tunable lasers, Ultraviolet radiation, Astronomical imaging, Ozone, Mirrors, Absorption

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Proceedings Article | 8 April 2003 Paper

Comparison of ultraviolet bidirectional reflectance distribution function (BRDF) measurements of diffusers used in the calibration of the Total Ozone Mapping Spectrometer (TOMS)

James Butler, Hongwoo Park, Patricia Barnes, Edward Early, Carina van Eijk-Olij, A. Erik Zoutman, Stefanie van Buller-Leeuwen, Jos Schaarsberg

Proceedings Volume 4881, (2003) https://doi.org/10.1117/12.463013

KEYWORDS: Bidirectional reflectance transmission function, Diffusers, Calibration, Ozone, Telescopic pixel displays, Scatter measurement, Sensors, Ultraviolet radiation, Receivers, Spectroscopy

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Proceedings Article | 9 February 2001 Paper

Radiometric calibration of total ozone mapping spectrometer: flight model 5 (TOMS-5) aboard QuickTOMS

Hongwoo Park, Richard McPeters, Glen Jaross, Matthew Kowalewski, Scott Janz, Robert Haring

Proceedings Volume 4169, (2001) https://doi.org/10.1117/12.417127

KEYWORDS: Calibration, Diffusers, Ozone, Reflectivity, Lamps, Free electron lasers, Spectroscopy, Mirrors, Bidirectional reflectance transmission function, Ultraviolet radiation

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Proceedings Article | 15 November 2000 Paper

Spectral band calibration of the Total Ozone Mapping Spectrometer (TOMS) using a tunable laser technique

Robert Haring, Frederick Williams, Ulli Hartmann, Doug Becker, Gary Vanstone, Hongwoo Park, Pawan Bhartia, Richard McPeters, Glen Jaross, Matthew Kowalewski

Proceedings Volume 4135, (2000) https://doi.org/10.1117/12.494208

KEYWORDS: Calibration, Dye lasers, Ultraviolet radiation, Monochromators, Sensors, Mirrors, Integrating spheres, Power meters, Visible radiation, Lamps

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The Total Ozone Mapping Spectrometer (TOMS) provides daily global mapping of the total column ozone in the earth’s atmosphere. It does this by measuring the solar irradiance and the backscattered solar radiance in 6 spectral bands falling within the range from 308.6 nm to 360 nm. The accuracy of the ozone retrieval is highly dependent on the knowledge of the transfer characteristics and center wavelength for each spectral band. A 0.1 nm wavelength error translates to a 1.6% error in ozone. Several techniques have historically been used to perform the wavelength calibration of the TOMS instruments. These methods include the use of film and reference spectra from low-pressure spectral line lamps and the use of continuum sources with a narrow-band scanning monochromator. The spectral transfer characteristic of the Flight Model 5 instrument for the QuikTOMS mission was calibrated using a new technique employing a frequency doubled tunable dye laser. The tunable laser has several advantages that include a very narrow spectral bandwidth; accurate wavelength determination using a wavemeter; and the ability to calibrate the instrument system level of assembly (prior methods required that the calibration be performed at the monochromator sub assembly level). The technique uses the output from a diode-pumped solid state Nd:V04 laser that is frequency doubled to provide a continuous wave 532 nm pump laser beam to a Coherent Model 899-01 frequency doubled ring dye laser. The output is directed into the entrance port of a 6-inch diameter Spectralon integrating sphere. A GaP photodiode is used to monitor the sphere wall radiance while a Burleigh Wavemeter (WA-1500) is used to monitor the wavelength of the visible output of the dye laser. The TOMS field of view is oriented to view the exit port of the integrating sphere. During the measurement process the response of the instrument is monitored as the laser source is stepped in 0.02-nm increments over each of the six TOMS spectral bands. Results of the new technique allow establishing the wavelength center to a precision of better than 0.1 nm. In addition to the spectral band measurements, the laser provided a means to calibrate the radiometric linearity of the QuikTOMS instrument and yield new insights into the stray light performance of the complete optical system.

Proceedings Article | 28 December 1999 Paper

Prelaunch tests for the calibration of Total Ozone Mapping Spectrometer (TOMS) flight model 5 (FM-5)

Hongwoo Park, F. Cunningham, Jay Herman, Richard McPeters, Pawan Bhartia, Ulli Hartmann, Robert Haring

Proceedings Volume 3870, (1999) https://doi.org/10.1117/12.373203

KEYWORDS: Calibration, Diffusers, Ozone, Free electron lasers, Monochromators, Optical spheres, Satellites, Polarization, Sensors, Lamps

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Proceedings Article | 21 December 1998 Paper

Joint Russian-USA Meteor-3M(2)/TOMS-5 mission

Hongwoo Park, Shahid Habib, F. Cunningham, Jay Herman, Pawan Bhartia, Rashid Salikhov, Albert Chernikov

Proceedings Volume 3498, (1998) https://doi.org/10.1117/12.333659

KEYWORDS: Ozone, Space operations, Diffusers, Interfaces, Control systems, Spectroscopy, Data processing, Calibration, Satellites, Aerosols

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Proceedings Article | 31 December 1997 Paper

Novel spectrograph/radiometer for cloud top height measurement using three complementary techniques

Hongwoo Park, Peter Soulen, Coorg Prasad

Proceedings Volume 3221, (1997) https://doi.org/10.1117/12.298103

KEYWORDS: Clouds, Thermography, Infrared radiation, Absorption, Aerospace engineering, Oxygen, Spectrographs, Optical filters, Bandpass filters, Absorption filters

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Proceedings Article | 11 November 1996 Paper

Radiometric calibration of second-generation Total Ozone Mapping Spectrometer (TOMS)

Hongwoo Park, Arlin Krueger, Ernest Hilsenrath, Glen Jaross, Robert Haring

Proceedings Volume 2820, (1996) https://doi.org/10.1117/12.258098

KEYWORDS: Calibration, Diffusers, Ozone, Mirrors, Collimation, Bidirectional reflectance transmission function, Integrating spheres, Lamps, Free electron lasers, Satellites

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Proceedings Article | 8 November 1996 Paper

Improved ozone trend measuring capabilities of TOMS instruments

Glen Jaross, Arlin Krueger, Hongwoo Park, Robert Haring

Proceedings Volume 2831, (1996) https://doi.org/10.1117/12.257206

KEYWORDS: Diffusers, Calibration, Ozone, Reflectivity, Spectrometers, Mirrors, Precision calibration, Mendelevium, Aerospace engineering, Sun

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Proceedings Article | 1 June 1991 Paper

Acquisition and tracking performance measurements for a high-speed area array detector system

Ralph Short, Michael Cosgrove, David Clark, Anthony Martino, Hongwoo Park, Bernard Seery

Proceedings Volume 1417, (1991) https://doi.org/10.1117/12.43748

KEYWORDS: Sensors, Point spread functions, Detection and tracking algorithms, Calibration, Signal to noise ratio, Detector arrays, Telecommunications, Digital signal processing, Free space optical communications, Laser applications

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Proceedings Article | 1 January 1991 Paper

Instantaneous velocity field measurement of objects in coaxial rotation using digital image velocimetry

Young Cho, Hongwoo Park

Proceedings Volume 1346, (1991) https://doi.org/10.1117/12.23345

KEYWORDS: Velocimetry, Fourier transforms, Image processing, Fringe analysis, Velocity measurements, Digital imaging, High speed photography, High speed photonics, Image filtering, Video

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Showing 5 of 12 publications

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