Dr. Sungwook E. Hong Profile

Dr. Sungwook E. Hong

at Korea Astronomy and Space Science Institute

SPIE Involvement:

Author

Publications (6)

PROCEEDINGS ARTICLE | July 13, 2018

Wide-field multi-object spectroscopy with MANIFEST

Proc. SPIE. 10702, Ground-based and Airborne Instrumentation for Astronomy VII

KEYWORDS: Telescopes, Spectrographs, Optical instrument design

Read Abstract

SPIE Journal Paper | July 11, 2018

Noise characterization of IUCAA digital sampling array controller

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

JATIS Vol. 4 Issue 03

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

Read Abstract

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 | July 10, 2018

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

Proc. SPIE. 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III

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

Read Abstract

PROCEEDINGS ARTICLE | July 8, 2018

DOTIFS: spectrograph optical and opto-mechanical design

Proc. SPIE. 10702, Ground-based and Airborne Instrumentation for Astronomy VII

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

Read Abstract

PROCEEDINGS ARTICLE | August 2, 2016

AAO Starbugs: software control and associated algorithms

Proc. SPIE. 9913, Software and Cyberinfrastructure for Astronomy IV

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

Read Abstract

PROCEEDINGS ARTICLE | July 18, 2014

Field target allocation and routing algorithms for Starbugs

Proc. SPIE. 9152, Software and Cyberinfrastructure for Astronomy III

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

Read Abstract

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years