Dr. Sungwook E. Hong Profile

Dr. Sungwook E. Hong

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Publications (9)

SPIE Journal Paper | 4 January 2024

Maunakea Spectroscopic Explorer exposure time calculator for end-to-end simulator: to optimizing spectrograph design and observing simulation

Tae-Geun Ji, Jennifer Sobeck, Changgon Kim, Hojae Ahn, Mingyeong Yang, Taeeun Kim, Sungwook E. Hong, Kei Szeto, Jennifer L. Marshall, Christian Surace, Soojong Pak

JATIS, Vol. 10, Issue 01, 018001, (January 2024) https://doi.org/10.1117/12.10.1117/1.JATIS.10.1.018001

KEYWORDS: Equipment, Spectroscopy, Spectral resolution, Spectrographs, Lawrencium, Telescopes, Design, Software development, Near infrared, Device simulation

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Proceedings Article | 29 August 2022 Poster + Paper

An exposure time calculator for the Maunakea Spectroscopic Explorer

Tae-Geun Ji, Taeeun Kim, Changgon Kim, Hojae Ahn, Mingyeong Yang, Soojong Pak, Sungwook E. Hong, Jennifer E. Sobeck, Kei Szeto, Jennifer L. Marshall, Christian Surace

Proceedings Volume 12189, 121892N (2022) https://doi.org/10.1117/12.2629101

KEYWORDS: Spectral resolution, Signal to noise ratio, Spectroscopy, Optical fibers, Spectrographs, Data modeling, Telescopes, Software development, Lawrencium, Astronomy

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Proceedings Article | 3 January 2020 Paper

MANIFEST metrology toolkit

Michael Goodwin, Sungwook Hong

Proceedings Volume 11203, 112031C (2020) https://doi.org/10.1117/12.2539897

KEYWORDS: Metrology, Cameras, Calibration, Distortion, Imaging systems, Telescopes, Optical fibers, Visual process modeling, Machine vision, Computer vision technology

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Proceedings Article | 13 July 2018 Paper

Wide-field multi-object spectroscopy with MANIFEST

Jon Lawrence, Sagi Ben-Ami, David Brown, Rebecca Brown, Scott Case, Timothy Chin, Matthew Colless, Adam Contos, Darren Depoy, Ian Evans, Daniel Faes, Tony Farrell, Peter Gillingham, Michael Goodwin, Sungwook Hong, Narae Hwang, Wong-Seob Jeong, Urs Klauser, Kyler Kuehn, Nuria Lorente, Slavko Mali, Jennifer Marshall, Helen McGregor, Rolf Muller, Rafael Millan-Gabet, Vijay Nichani, Claudia Oliveria, Henrique Ortolan, naveen Pai, Sung-Joon Park, Travis Prochaska, Will Saunders, Luke Schmidt, Aline Souza, Andrew Szentgyorgyi, Lew Waller, Ross Zhelem

Proceedings Volume 10702, 10702A6 (2018) https://doi.org/10.1117/12.2314178

KEYWORDS: Telescopes, Spectrographs, Optical instrument design

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SPIE Journal Paper | 11 July 2018

Noise characterization of IUCAA digital sampling array controller

Sabyasachi Chattopadhyay, A. N. Ramaprakash, Bhushan Joshi, Pravinkumar Chordia, Mahesh Burse, Kalpesh Chillal, Sakya Sinha, Sujit Punnadi, Ketan Rikame, Sungwook Hong, Dhruv Paranjpye, Haeun Chung, Changbom Park, Amitesh Omar

JATIS, Vol. 4, Issue 03, 036002, (July 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.3.036002

KEYWORDS: Interference (communication), Charge-coupled devices, Electrons, Analog electronics, Clocks, Amplifiers, Power supplies, Sensors, Field programmable gate arrays, Statistical modeling

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The IUCAA digital sampling array controller (IDSAC) is a flexible and generic yet powerful CCD controller that can handle a wide range of scientific detectors. Based on an easily scalable modular backplane architecture consisting of single board controllers (SBC), IDSAC can control large detector arrays and mosaics. Each of the SBCs offers the full functionality required to control a CCD independently. The SBCs can be cold swapped without the need to reconfigure them. IDSAC is also available in a backplane-less architecture. Each SBC can handle data from up to four video channels with or without dummy outputs at speeds up to 500-kilo pixels per second (kPPS) per channel with a resolution of 16 bits. Communication with a Linux-based host computer is through a USB3.0 interface, with the option of using copper or optical fibers. A field programmable gate array (FPGA) is used as the master controller in each SBC, which allows great flexibility in optimizing performance by adjusting gain, timing signals, bias levels, etc., using user-editable configuration files without altering the circuit topology. Elimination of thermal kTC noise is achieved via digital correlated double sampling (DCDS). The number of digital samples per pixel (for both reset and signal levels) is user configurable. We present the results of noise performance characterization of IDSAC through simulation, theoretical modeling, and actual measurements. The contribution of different types of noise sources is modeled using a tool to predict noise of a generic DCDS signal chain analytically. The analytical model predicts the net input referenced noise of the signal chain to be 5 electrons for 200-k pixels/s per channel readout rate with three samples per pixel. Using a cryogenic test setup in the lab, the noise is measured to be 5.4 e (24.3 μV), for the same readout configuration. With a better-optimized configuration of 500-kPPS readout rate, the measured noise is down to 3.8 electrons RMS (17 μV), with three samples per interval.

Proceedings Article | 10 July 2018 Paper

Multiple rooks of chess: a generic integral field unit deployment technique

Sabyasachi Chattopadhyay, A. Ramaprakash, Pravin Khodade, Kabir Chakravarti, Shabbir Shaikh, Haeun Chung, Sungwook Hong

Proceedings Volume 10706, 107065S (2018) https://doi.org/10.1117/12.2313798

KEYWORDS: Detection and tracking algorithms, Target acquisition, Telescopes, Robots, Space telescopes, Astronomy, Spectrographs, Computer simulations, Astronomical imaging

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Proceedings Article | 8 July 2018 Paper

DOTIFS: spectrograph optical and opto-mechanical design

Haeun Chung, A. N. Ramaprakash, Pravin Khodade, Deepa Modi, Chaitanya Rajarshi, Sabyasachi Chattopadhyay, Pravin Chordia, Vishal Joshi, Sungwook Hong, Amitesh Omar, Swara Ravindranath, Yong-Sun Park, Changbom Park

Proceedings Volume 10702, 107027A (2018) https://doi.org/10.1117/12.2311594

KEYWORDS: Spectrographs, Cameras, Charge-coupled devices, Optical design, Collimators, Optical filters, Spectral resolution, Tolerancing, Optomechanical design, Optical fibers, Thermal analysis

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Proceedings Article | 2 August 2016 Paper

AAO Starbugs: software control and associated algorithms

Nuria Lorente, Minh Vuong, Keith Shortridge, Tony Farrell, Scott Smedley, Sungwook Hong, Carlos Bacigalupo, Michael Goodwin, Kyler Kuehn, Christophe Satorre

Proceedings Volume 9913, 99130U (2016) https://doi.org/10.1117/12.2233685

KEYWORDS: Telescopes, Software development, Control systems, Detection and tracking algorithms, Robots, Glasses, Metrology, Cameras, Distortion, Calibration

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Proceedings Article | 18 July 2014 Paper

Field target allocation and routing algorithms for Starbugs

Michael Goodwin, Nuria P. Lorente, Christophe Satorre, Sungwook Hong, Kyler Kuehn, Jon Lawrence

Proceedings Volume 9152, 91520S (2014) https://doi.org/10.1117/12.2055047

KEYWORDS: Detection and tracking algorithms, Algorithm development, Stars, Telescopes, Galactic astronomy, Robotics, Device simulation, Metrology, Prototyping, Computer simulations

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Showing 5 of 9 publications

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