Search Results - "Supnithi, Pornchai"

Integer programming‐based non‐uniform window decoding schedules for spatially coupled low‐density parity‐check codes by Khittiwitchayakul, Sirawit, Phakphisut, Watid, Supnithi, Pornchai

“…Spatially coupled low‐density parity‐check (SC‐LDPC) codes generally use a window decoding scheme, which is known to yield a near‐optimal decoding, compared to…”
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Automatic classification of spread‐F types in ionogram images using support vector machine and convolutional neural network by Benchawattananon, Phongsachot, Siritaratiwat, Apirat, Supnithi, Pornchai, Nishioka, Michi, Perwitasari, Septi, Suthisopapan, Puripong, Kruesubthaworn, Anan

“…An ionogram image serves as a valuable data for examining the ionospheric bottom side characteristics and variabilities. Spread-F is indicated or identified by…”
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Statistical Analysis of Separation Distance Between Equatorial Plasma Bubbles Near Suvarnabhumi International Airport, Thailand by Bumrungkit, Acharaporn, Supnithi, Pornchai, Saito, Susumu

“…Ionospheric disturbances can lead to the major detrimental effects on the availability of ground‐based augmentation system. In low‐latitude regions, equatorial…”
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Classification of the equatorial plasma bubbles using convolutional neural network and support vector machine techniques by Thanakulketsarat, Thananphat, Supnithi, Pornchai, Myint, Lin Min Min, Hozumi, Kornyanat, Nishioka, Michi

“…Equatorial plasma bubble (EPB) is a phenomenon characterized by depletions in ionospheric plasma density being formed during post-sunset hours. The…”
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Equatorial spread-F forecasting model with local factors using the long short-term memory network by Thammavongsy, Phimmasone, Supnithi, Pornchai, Myint, Lin Min Min, Hozumi, Kornyanat, Lakanchanh, Donekeo

“…The predictability of the nighttime equatorial spread-F (ESF) occurrences is essential to the ionospheric disturbance warning system. In this work, we…”
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Double-thin-shell approach to deriving total electron content from GNSS signals and implications for ionospheric dynamics near the magnetic equator by Maruyama, Takashi, Hozumi, Kornyanat, Ma, Guanyi, Supnithi, Pornchai, Tongkasem, Napat, Wan, Qingtao

“…A new technique was developed to estimate the ionospheric total electron content (TEC) from Global Navigation Satellite System (GNSS) satellite signals. The…”
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Estimation and Validation of Vertical Total Electron Content Using Standalone Single-Frequency Observations by Tongkasem, Napat, Myint, Lin Min Min, Supnithi, Pornchai

“…Nonuniform ionospheric delay is a well-known cause of degradations in radio wave propagations such as in satellite communication and positioning. In general,…”
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Penetration of the electric fields of the geomagnetic sudden commencement over the globe as observed with the HF Doppler sounders and magnetometers by Kikuchi, Takashi, Chum, Jaroslav, Tomizawa, Ichiro, Hashimoto, Kumiko K., Hosokawa, Keisuke, Ebihara, Yusuke, Hozumi, Kornyanat, Supnithi, Pornchai

“…Using the HF Doppler sounders at middle and low latitudes (Prague, Czech Republic; Tucuman, Argentina; Zhongli, Republic of China, and Sugadaira, Japan), we…”
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Simultaneous equatorial plasma bubble observation using amplitude scintillations from GNSS and LEO satellites in low-latitude region by Seechai, Khanitin, Myint, Lin Min Min, Hozumi, Kornyanat, Nishioka, Michi, Saito, Susumu, Yamamoto, Mamoru, Supnithi, Pornchai

“…This study estimates the scale sizes of the plasma density irregularities and the longitudinal width associated with equatorial plasma bubbles (EPBs) in…”
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Single-Frequency Time-Step Ionospheric Delay Gradient Estimation at Low-Latitude Stations by Budtho, Jirapoom, Supnithi, Pornchai, Saito, Susumu

“…The irregularity of the local-area ionospheric delay is a primary impediment for Ground-Based Augmentation System (GBAS) services. Excessive ionospheric delay…”
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Monitoring of equatorial plasma bubbles using aeronautical navigation system: a feasibility study by Hosokawa, Keisuke, Saito, Susumu, Nakata, Hiroyuki, Lin, Chien-Hung, Lin, Jia-Ting, Supnithi, Pornchai, Tomizawa, Ichiro, Sakai, Jun, Takahashi, Toru, Tsugawa, Takuya, Nishioka, Michi, Ishii, Mamoru

“…It has long been known that field-aligned irregularities within equatorial plasma bubbles (EPBs) can cause long-range propagation of radio waves in the VHF…”
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Ionospheric delay gradient monitoring for GBAS by GPS stations near Suvarnabhumi airport, Thailand by Rungraengwajiake, Sarawoot, Supnithi, Pornchai, Saito, Susumu, Siansawasdi, Nattapong, Saekow, Apitep

“…Ground‐based augmentation system (GBAS) is an important augmentation system that provides the differential corrections and integrity information from the…”
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Performance of the hybrid MLPNN based VE (hMLPNN-VE) for the nonlinear PMR channels by Wongsathan, Rati, Phakphisut, Watid, Supnithi, Pornchai

“…This paper proposes a hybrid of multilayer perceptron neural network (MLPNN) and Volterra equalizer (VE) denoted hMLPNN-VE in nonlinear perpendicular magnetic…”
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Equatorial and low‐latitude ionospheric response to the 17–18 March 2015 great storm over Southeast Asia longitude sector by Jiang, Chunhua, Yang, Guobin, Liu, Jing, Yokoyama, Tatsuhiro, Liu, Tongxin, Lan, Ting, Zhou, Chen, Zhang, Yuannong, Zhao, Zhengyu, Komolmis, Tharadol, Supnithi, Pornchai, Yatini, Clara Y.

“…This study mainly investigates equatorial and low‐latitude ionospheric response to a great geomagnetic storm that occurred on 17 March 2015. We found that…”
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Ionospheric peak height at the magnetic equator: Comparison between ionosonde measurements and IRI by Maruyama, Takashi, Ma, Guanyi, Tsugawa, Takuya, Supnithi, Pornchai, Komolmis, Tharadol

“…The ionospheric peak height in the F layer (hmF2) varies with not only thermospheric conditions but also dynamic processes in the upper atmosphere. At…”
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Total Electron Content Observations by Dense Regional and Worldwide International Networks of GNSS by Tsugawa, Takuya, Nishioka, Michi, Ishii, Mamoru, Hozumi, Kornyanat, Saito, Susumu, Shinbori, Atsuki, Otsuka, Yuichi, Saito, Akinori, Buhari, Suhaila M., Abdullah, Mardina, Supnithi, Pornchai

“…Two-dimensional ionospheric total electron content (TEC) maps have been derived from ground-based Global Navigation Satellite System (GNSS) receiver networks…”
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Predawn plasma bubble cluster observed in Southeast Asia by Watthanasangmechai, Kornyanat, Yamamoto, Mamoru, Saito, Akinori, Tsunoda, Roland, Yokoyama, Tatsuhiro, Supnithi, Pornchai, Ishii, Mamoru, Yatini, Clara

“…Predawn plasma bubble was detected as deep plasma depletion by GNU Radio Beacon Receiver (GRBR) network and in situ measurement onboard Defense Meteorological…”
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Low-latitude ionospheric height variation as observed by meridional ionosonde chain: Formation of ionospheric ceiling over the magnetic equator by Maruyama, Takashi, Uemoto, Jyunpei, Ishii, Mamoru, Tsugawa, Takuya, Supnithi, Pornchai, Komolmis, Taradol

“…A multipoint ionosonde observation campaign was conducted along the magnetic meridional plane in Southeast Asia to study ionosphere‐thermosphere coupling. One…”
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Off-Track Detection Based on the Readback Signals in Magnetic Recording by Myint, Lin Min Min, Supnithi, Pornchai

“…Off-track condition in magnetic recording systems degrades the system performance. It is typically detected and adjusted by the servo control loop. In this…”
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The occurrence of equatorial spread-F at conjugate stations in Southeast Asia by Klinngam, Somjai, Supnithi, Pornchai, Rungraengwajiake, Sarawoot, Tsugawa, Takuya, Ishii, Mamoru, Maruyama, Takashi

“…In this study, the probability of equatorial spread-F (ESF) occurrence at the conjugate stations in Southeast Asia: Chiangmai station (CMU), Thailand, and…”
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