Dr. Yunjin Kim Profile

Dr. Yunjin Kim

at Jet Propulsion Lab

SPIE Involvement:

Author

SPIE Journal Paper | 16 April 2012

Calibration and alignment of metrology system for the Nuclear Spectroscopic Telescope Array mission

Carl Liebe, Yunjin Kim, Patrick Meras, William Craig, Michael Raffanti, Christopher Scholz, Ryan McLean

OE, Vol. 51, Issue 4, 043605, (April 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.4.043605

KEYWORDS: Metrology, Laser metrology, Sensors, Calibration, Optical alignment, Space telescopes, Stars, Sun, Epoxies, Observatories

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Proceedings Article | 29 July 2010 Paper

The Nuclear Spectroscopic Telescope Array (NuSTAR)

Fiona Harrison, Steve Boggs, Finn Christensen, William Craig, Charles Hailey, Daniel Stern, William Zhang, Lorella Angelini, Hongjun An, Varun Bhalerao, Nicolai Brejnholt, Lynn Cominsky, W. Rick Cook, Melania Doll, Paolo Giommi, Brian Grefenstette, Allan Hornstrup, Vicky Kaspi, Yunjin Kim, Takeo Kitaguchi, Jason Koglin, Carl Christian Liebe, Greg Madejski, Kristin Kruse Madsen, Peter Mao, David Meier, Hiromasa Miyasaka, Kaya Mori, Matteo Perri, Michael Pivovaroff, Simonetta Puccetti, Vikram Rana, Andreas Zoglauer

Proceedings Volume 7732, 77320S (2010) https://doi.org/10.1117/12.858065

KEYWORDS: Sensors, Space telescopes, Telescopes, X-ray telescopes, Multilayers, Spectroscopy, Hard x-rays, Spectral resolution, Optical alignment, Space operations

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Proceedings Article | 3 October 2006 Paper

Aquarius/SAC-D mission overview

Amit Sen, Yunjin Kim, Daniel Caruso, Gary Lagerloef, Raul Colomb, Simon Yueh, David Le Vine

Proceedings Volume 6361, 63610I (2006) https://doi.org/10.1117/12.691981

KEYWORDS: Observatories, Temperature metrology, Space operations, Climatology, Environmental sensing, Radiometry, Sensors, Aerospace engineering, Data archive systems, Global Positioning System

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Proceedings Article | 22 December 2004 Paper

Estimation of soil moisture with L-band multipolarization radar

Jiancheng Shi, K. S. Chen, Y. Kim, J. J. Van Zyl, E. Njoku, G. Sun, P. O'Neill, T. Jackson, D. Entekhabi

Proceedings Volume 5654, (2004) https://doi.org/10.1117/12.578311

KEYWORDS: Soil science, Scattering, Backscatter, Polarization, Vegetation, Data modeling, Error analysis, Radar, Dielectric polarization, L band

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Proceedings Article | 23 December 1997 Paper

Current status of the NASA/JPL airborne synthetic aperture radar (AIRSAR)

Yun-Ling Lou, Yunjin Kim, W. Edelstein, T. Miller, G. Romero, T. Sato, W. Skotnicki, S. Tauch

Proceedings Volume 3120, (1997) https://doi.org/10.1117/12.300626

KEYWORDS: Antennas, Radar, Image processing, Calibration, Global Positioning System, Receivers, Polarization, Interferometry, Data processing, Synthetic aperture radar

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Proceedings Article | 17 December 1996 Paper

Shuttle radar topography mapper (SRTM)

Rolando Jordan, Edward Caro, Yunjin Kim, Michael Kobrick, Yuhsyen Shen, Frederick Stuhr, Marian Werner

Proceedings Volume 2958, (1996) https://doi.org/10.1117/12.262717

KEYWORDS: Antennas, Radar, Data acquisition, Data storage, Interferometry, Polarization, Interferometric synthetic aperture radar, Interferometers, X band, Error analysis

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The use of interferometric SAR (IFSAR) to measure elevation is one of the most powerful and promising capabilities of radar. A properly equipped spaceborne IFSAR system can produce a highly accurate global digital elevation map, including cloud-covered areas, in significantly less time and at significantly lower cost than with other systems. For accurate topography, the interferometric measurements must be performed simultaneously in physically sperate receive system, since measurements made at different times with the same system suffer significant decorrelation. The US/German/Italian spaceborne imaging radar C/X-band SAR (SIR-C/X-SAR), successfully flown twice in 1994 aboard the Space Shuttle Endeavor, offers a unique opportunity for global multifrequency elevation mapping by the year 2000. With appropriate augmentation, SIR-C/X-SAR is capable of producing an accurate elevation map covering 80 percent of the Earth's land surface in a single 10-day Shuttle flight. The existing US SIR-C SCANSAR mode provides a 225-km swath at C-band, which makes this coverage possible. Addition of a C-band receive antenna, extended from the Shuttle bay on a mast and operating in concert with the existing SIR-C antenna, produces an interferometric pair. Accuracy is enhanced by utilizing the SIR-C dual polarizations simultaneously to form separate SCANSAR beams. Due to the practical limitation of approximately 60 meters for the mast length, the longer SIR-C L-band wavelength does not produce useful elevation measurement accuracy. IFSAR measurements can also be obtained by the German/Italian X-SAR, simultaneously with SIR-C, by utilizing an added outboard antenna at X-band to produce a swath coverage of about 50 km. Accuracy can be enhanced at both frequencies by processing both ascending and descending data takes. It is estimated that the 90 percent linear absolute elevation error achievable is less that 16 meters for elevation postings of 30 meters. This will be the first use of spaceborne IFSAR to acquire accurate topographic data on a global scale.

Proceedings Article | 17 June 1996 Paper

Design considerations of GeoSAR

Yunjin Kim, Scott Hensley, Louise Veilleux, W. Edelstein, Yun-Ling Lou, A. Burken, W. Skotnicky, T. Sato, W. Brown

Proceedings Volume 2747, (1996) https://doi.org/10.1117/12.243064

KEYWORDS: Antennas, Radar, X band, Interferometry, Calibration, Receivers, Transmitters, Interferometric synthetic aperture radar, Polarization, Backscatter

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Proceedings Article | 17 June 1996 Paper

Design of shuttle radar topography mapper (SRTM)

Rolando Jordan, Edward Caro, Yunjin Kim, Michael Kobrick, Yuhsyen Shen

Proceedings Volume 2747, (1996) https://doi.org/10.1117/12.243069

KEYWORDS: Antennas, Radar, Data acquisition, Data storage, Interferometry, Polarization, Interferometers, Synthetic aperture radar, Metrology, Data processing

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Proceedings Article | 19 August 1993 Paper

Shuttle imaging radar-C: a system integration and test perspective

Yuhsyen Shen, Louise Veilleux, Jeffrey Klein, Yunjin Kim, Rolando Jordan, Edward Caro, Frederick Stuhr

Proceedings Volume 1935, (1993) https://doi.org/10.1117/12.152582

KEYWORDS: Antennas, Data acquisition, Receivers, Signal processing, Radar, L band, System integration, Device simulation, Polarization, Synthetic aperture radar

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Proceedings Article | 11 November 1991 Paper

Wave interactions with continuous fractal layers

Yunjin Kim, Dwight Jaggard

Proceedings Volume 1558, (1991) https://doi.org/10.1117/12.49617

KEYWORDS: Fractal analysis, Refractive index, Scattering, Wave propagation, Electromagnetism, Electromagnetic radiation, Reflectivity, Electrical engineering, Control systems, Dielectrics

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Showing 5 of 10 publications

Conference Committee Involvement (1)

Microwave Remote Sensing of the Atmosphere and Environment V

15 November 2006 | Goa, India

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