研究者詳細 - 趙　孟佑

論文 - 趙　孟佑

分割表示643 件中 81 - 100 件目／全件表示 >>

Programmable Interface Board for Higher CubeSat Form Factor and Complex Mission Payload 査読有り

Marloun Sejera, Takahashi Yamauchi, Yukihisa Otani,

2021 CubeSat Developers Workshop 2021年04月

Quantitative Evaluation of SRS Similarity for Aerospace Testing Applications 査読有り国際誌

Ibukun O. Adebolu , Hirokazu Masui , Mengu Cho

Shock and Vibration ( Hindawi ) 2021 2021年02月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The similarity between a shock response spectrum (SRS) and a target shock specification is essential in evaluating the success of a qualification test of a space component. Qualification testing facilities often utilize shock response databases for rapid testing. Traditionally, the comparison of two shocks (SRS) depends on visual evaluation, which is, at best, subjective. This paper compares five different quantitative methods for evaluating shock response similarity. This work aims to find the most suitable metric for retrieving an SRS from a pyroshock database. The five methods are the SRS difference, mean acceleration difference, average SRS ratio, dimensionless SRS coefficients, and mean square goodness-of-fit method. None of the similarity metrics account for the sign of the deviation between the target SRS and database SRS, making it challenging to satisfy the criteria for a good shock test. We propose a metric (the weighted distance) for retrieving the most similar SRS to a target SRS specification from a shock database in this work. The weighted distance outperforms the mean square goodness-of-fit and other metrics in database SRS retrieval for rapid qualification testing.

DOI： 10.1155/2021/6655878

Scopus

その他リンク： https://www.hindawi.com/journals/sv/2021/6655878/

Adaptive Array Antenna in Ground Station Control System for Massive LEO CubeSat Constellation Tracking 査読有り国際誌

Syazana Basyirah Binti Mohammad Zaki, Mengu Cho, Nobuyuki Kaya

International Review of Aerospace Engineering ( Praise Worthy Prize ) 14 ( 2 ) 97 - 111 2021年02月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Since Low Earth Orbit has become a popular orbit to place satellites, CubeSat constellation tracking is challenging. The higher capacity and capability of a new Ground Station tracking system are in demand and this motivates researchers to come out with a solution to mitigate the traditional Ground Station degradation performance. This paper discusses the implementation of the Least Mean Square algorithm to the Adaptive Array Antenna for the Ground Station tracking system application. The simulation results show the main beam pattern’s capability to perform instantaneous tracking and steering towards the targeted CubeSat while suppressing the side lobes towards the other interfering CubeSats when massive CubeSats constellations take place. Planar and circular array antennas are analyzed by setting the optimum weighting factors to be adapted. Three scenarios of CubeSats constellations are simulated. The Adaptive Array Antenna’s performance for each scenario is analyzed based on the beam width characteristics and the Signal-to-Interference Ratio of the beam pattern. The number of CubeSats tracked by the Adaptive Array Antenna and the system’s capability to perform fast tracking as the number of antenna array elements is also discussed in this paper. Finally, solutions to mitigate the Least Mean Square algorithm’s limitation to perform fast tracking when massive interferer CubeSats are nearby are proposed.

DOI： 10.15866/irease.v14i2.19596

Scopus

その他リンク： https://www.praiseworthyprize.org/jsm/index.php?journal=irease&page=article&op=view&path%5B%5D=25044

Universal Verification Platform and Star Simulator for Fast Star Tracker Design 査読有り国際誌

Victor Hugo Schulz, Gabriel Mariano Marcelino, Laio Oriel Seman, Jeferson Santos Barros, Sangkyun Kim, Mengu Cho, Gabriel Villarrubia González, Valderi Reis Quietinho Leithardt, Eduardo Augusto Bezerra

Sensors ( Multidisciplinary Digital Publishing Institute ) 21 ( 3 ) 1 - 23 Article number 907 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Developing star trackers quickly is non-trivial. Achieving reproducible results and comparing different algorithms are also open problems. In this sense, this work proposes the use of synthetic star images (a simulated sky), allied with the standardized structure of the Universal Verification Methodology as the base of a design approach. The aim is to organize the project, speed up the development time by providing a standard verification methodology. Future rework is reduced through two methods: a verification platform that us shared under a free software licence; and the layout of Universal Verification Methodology enforces reusability of code through an object-oriented approach. We propose a black-box structure for the verification platform with standard interfaces, and provide examples showing how this approach can be applied to the development of a star tracker for small satellites, targeting a system-on-a-chip design. The same test benches were applied to both early conceptual software-only implementations, and later optimized software-hardware hybrid systems, in a hardware-in-the-loop configuration. This test bench reuse strategy was interesting also to show the regression test capability of the developed platform. Furthermore, the simulator was used to inject specific noise, in order to evaluate the system under some real-world conditions.

DOI： 10.3390/s21030907

Scopus

その他リンク： https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866273/

Over-the-Air Firmware Update for an Educational CubeSat Project 査読有り国際誌

Maisun Ibn Monowar, Mengu Cho

International Review of Aerospace Engineering ( Praise Worthy Prize ) 14 ( 1 ) 20 - 27 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The CubeSat standard has been envisioned to teach students about satellites from the initial conceptualization to the in-orbit operation. Educational satellite projects have contributed to the creation of skilled workforce and have also advanced spacecraft technology. Unfortunately, educational satellites are not always successful. Design defects in the hardware can be isolated and addressed by running functional checks before launch. On the other hand, software bugs are difficult to identify and may go unidentified months into in-orbit operation. Due to the limited time available for software testing, students cannot spend sufficient time running the satellite software in an operational scenario. While in-orbit software patching is quite a simple and routine task for traditional commercial and government satellite operators, they are uncommon in the CubeSat domain. In this paper, the question of why satellite firmware updates are not very common for educational satellites is addressed. Technical necessities for an upgradable CubeSat are examined for both microcontroller and system-on-a-chip based CubeSats. After comparing both systems, a hybrid system is proposed as a solution for educational CubeSats. A system capable of upgrading the satellite firmware in a single satellite pass is synthesized. It is found out that a roadblock to over-the-air software updates for CubeSats is created not only by the technical aspect, but also by the students’ habit of skipping some engineering practices in their design process. Although their actions may not be critical to the mission success, they are much more important when a maintainable satellite firmware is desired. This paper explores the challenges in upgrading CubeSat flight software in orbit, some possible ways to implement this functionality, demonstration of a method that will allow in-orbit software updates despite having low resources, and a few recommendations for a maintainable satellite software.

DOI： 10.15866/irease.v14i1.19832

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85102949173&origin=inward

Application of Small Satellites for Low-Cost Remote Data Collection Using LoRa Transmitters 査読有り

LEPCHA Pooja, KIM Sankyun, MASUI Hirokazu, CHO Mengu

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 一般社団法人日本航空宇宙学会 ) 19 ( 2 ) 224 - 230 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

<p>The advancement of small satellites has greatly reduced the overall cost and development time of the satellite compared to conventional satellites fulfilling similar missions. Although there have been many developments on the satellite side, for missions like remote data collection the sensor nodes on the ground have been insubstantial because of its limitations in standalone operability and higher power consumption leading to higher cost and sparse area coverage. In this paper, we designed and developed a low power, low-cost remote sensor station with LoRa transmitters, which has the standalone operating capability. It is compact, mobile and it has a simple design. It is equipped with a self-sustaining power supply, LoRa transmitters, processors, antenna and sensors; mainly focusing on the weather monitoring parameters like humidity and temperature. The basic mechanism of data relay is to sense and transmit sensor data packets in real-time. The feasibility of the sensor station has been studied in terms of power budget, link budget, its operation outdoors and the overall development costs. The sensor station can be placed in areas where there are no ground infrastructures for communication.</p>

DOI： 10.2322/tastj.19.224

CiNii Article

CiNii Research

その他リンク： https://ci.nii.ac.jp/naid/130007994902

Educational and Research Activities of Nanosatellite Technologies at the Kyusyu Institute of Technology 査読有り国際誌

Mariko Teramoto, Mengu Cho, Hirokazu Masui, Sangkyun Kim, Takashi Yamauchi, Necmi Chihan Orger, George Maeda

43rd COSPAR Scientific Assembly 2021年01月

Comparison of Propulsion Method for Regolith Thruster 査読有り国際誌

Noruji MUTO, Necmi Cihan ORGER, Jose Rodrigo CORDOVA ALARCON, Kazuhiro TOYODA, Mengu CHO

43rd COSPAR 2021 2021年01月

Deploying a Small Satellite-based Network of Ground Sensor Terminals (GSTs) in Developing Nations for enabling Remote Internet of Things (IoT) 査読有り国際誌

Lepcha P., Dayarathna T., Orger N.C., Purio M.A., Kishimoto M., El-Megharbel H.A., Cho M.

Proceedings of the International Astronautical Congress, IAC B4 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Small satellites are appealing platforms to develop and demonstrate new technologies at a lower cost and shorter development time. These small satellites in the low earth orbit (LEO) have relatively low propagation delay and provide global coverage while they are significantly suitable for Internet of Things (IoT) based applications in remote areas with no access to terrestrial communication networks. This paper describes overall mission architecture and implementation of remote IoT using a small satellite platform named KITSUNE. One of the missions is to leverage IoT for building a network of remote ground sensor terminals (GST) in 10 developing countries. The involvement in this network has enabled the emerging nations' access to space technologies using a cost-effective low-power GST for their preferred application. The collaboration has also promoted capacity building and upskilled the participants as they built their own GST for terrestrial measurements that could be uplinked to the satellite. In addition, this paper describes the receiver payload design capable of simultaneously receiving multiple data from 8 channels. To meet the constraints in overall size and power budget, LoRa modulation has been employed in communication between the GST and the onboard payload. Conclusively, the paper presents a feasibility study of the mission with communication tests performed on the ground between the satellite payload and GST. KITSUNE is expected to be launched in late 2021 or early 2022. The data collected by the satellite, specific for each country will be archived and analyzed for generating prediction profiles and monitoring variables as a basis to address local issues faced in these countries.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85127552199&origin=inward

DEMONSTRATION OF WILDFIRE DETECTION USING IMAGE CLASSIFICATION ONBOARD CUBESAT 査読有り国際誌

bin Azami M.H., Orger N.C., Schulz V.H., Cho M.

International Geoscience and Remote Sensing Symposium (IGARSS) 2021-July 5413 - 5416 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In the past decade, a massive number of wildfire events have been reported worldwide. An economic loss every year shows the importance of having satellites to overcome this catastrophe. Earth observation CubeSat can be a solution to detect, monitor, and provide data for the fire departments from the aerial view. For this purpose, the utilization of the deep learning (DL) algorithm to process the images captured onboard CubeSat before they are downlinked to the ground station is demonstrated. As a proof-of-concept, a single-board computer (SBC), Raspberry Pi, has been integrated into the KITSUNE 6U CubeSat to run the model. In this paper, the results of functional and environment tests of our proof-of-concept implementation have shown the feasibility of using image classification onboard the CubeSat. The DL algorithm's accuracy has reached 95% in the ground test, and this accuracy can be improved with further verifications of the platform and analysis of flight results. Therefore, DL's advancement in CubeSat is the state-of-art that can contribute significantly to address the wildfire issues.

DOI： 10.1109/IGARSS47720.2021.9553108

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126019681&origin=inward

WILDFIRE DETECTION CUBESAT BASED ON CONVOLUTION NEURAL NETWORK 査読有り国際誌

Bin Azami M.H., Orger N.C., Schulz V.H., Cho M.

Proceedings of SPIE - The International Society for Optical Engineering 11914 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Wildfires burn millions of hectares of land every year globally. Most of them are caused by humans, while only 10-15% occur naturally due to the climate change. The hotter weather dries out forests and plants, making them more prone to fire. The "frontline wildfire defense" has fully utilized satellite imagery to monitor, map, and control the fire spread and damage. However, there are three major challenges of using traditional satellite data: (1) the spatial resolution, (2) the temporal resolution, and (3) the downlink and analyzing data on the ground. In recent technology, the satellites are developed into small-size CubeSats that supporting the resolution issues. By exploiting the deep learning (DL) technique, the CubeSat can become sufficiently "intelligent" to detect wildfire events. This paper discusses a potential approach for implementing a Convolution Neural Network (CNN) onboard a CubeSat to sense wildfire. The DL model has been tested on the Camera Controller Board (CCB) embedded with Raspberry Pi Compute Module (RPi CM3+), that interfacing with the imaging mission of a 6U CubeSat named KITSUNE. In addition, the space environment test of radiation Total Ionizing Dose (TID) with functional tests of the board has been discussed. The results have shown no anomaly observed on the RPi while the DL model achieved a 94% overall accuracy with 16 minutes of learning time and 32 seconds of classification time. Hence, the state-of-art processing images onboard CubeSat will improve the valuable downlink data as the limited time window passes through the ground station.

DOI： 10.1117/12.2603906

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85122980273&origin=inward

VERIFICATION OF THE 1U STANDARD CUBESAT ELECTRICAL POWER SYSTEM (EPS) FOR THE INTERNATIONAL SPACE STATION (ISS) SAFETY REQUIREMENTS 査読有り国際誌

Shrestha H.R., Purio M.A.C., Bautista I.Z.C., Cespedes A.J.J., Yamauchi T., Kim S., Cho M.

Proceedings of the International Astronautical Congress, IAC C3 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The BIRDS-4 satellites are the fourth generation of 1U CubeSats developed in Kyushu Institute of Technology (Kyutech), Japan. Kyutech has been deployed 1U CubeSats annually since 2017. It is called the BIRDS satellites series. BIRDS-4, a constellation of three 1U CubeSats, was released on 14th March 2021 from the International Space Station (ISS). The electrical power system (EPS) of BIRDS-4 needed to be modified to adopt the safety regulation changes that occurred after BIRDS-4. This paper explains how the satellites ensure the satellite's safety as required for satellites to be deployed from the ISS. This paper explains how the safety requirements for satellites were ensured from BIRDS-4, an additional deployment switch has been added to provide the three inhibits against the new cold launch requirement. This paper focuses on how deployment switches completely regulate the satellites by using inhibiting switches in the EPS circuit. Protection from over-charge, overdischarge, and external short hazards to the satellite's battery has been confirmed. Several ground tests were carried out for the BIRDS-4 Flight Model (FM) satellites, and the results of the verification are presented. Similarly, acceptance and verification tests were carried out for commercial-off-the-shelf (COTS) solar cells and batteries(cells). Inhibit verification test was conducted with the FMs by controlling 3 deployment switches that function as inhibit. To check the deployment switches actual functionality in the FM, inhibit functionality was also checked during the fit check. It was verified that the solar cells could not produce electricity inside the pod. The battery's charging line is completely isolated from the solar source by the electromechanical switches. The satellites were only being turned on 30 minutes after they have been deployed from the ISS. After going through the four generations of ISS deployment, the BIRDS EPS design now can serve as a standard 1U EPS design in compliance with ISS safety requirements.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85127553420&origin=inward

THE FIRST SATELLITES OF NEPAL, SRI LANKA (BIRDS-3); PARAGUAY (BIRDS-4); AND ZIMBABWE, UGANDA (BIRDS-5) 査読有り国際誌

Maeda G., Otim M., Ganda W., Cho M.

Proceedings of the International Astronautical Congress, IAC B4 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In 2015, Kyushu Institute of Technology (Kyutech) initiated a paradigm-shifting capacity building program called "BIRDS". First in 2015 was the BIRDS-1 Project, consisting of Ghana∗, Nigeria, Bangladesh∗, Mongolia∗, and Japan; second in 2016 was the BIRDS-2 Project, consisting of Bhutan∗, Malaysia, and the Philippines. (Note:∗denotes that BIRDS was the nation's first satellite.) The primary goal of BIRDS is capacity building. For any nation seeking a long-term, sustainable space program, it is sine qua non to have capable scientists and engineers. To promote space development, Kyutech identified "the first national satellite" as a means to capture the imagination and public support of non-space-faring nations. However, the first satellite is a means to an end - it is not the end. As the title of this paper indicates, Kyutech has progressed to BIRDS-3 (2017), BIRDS-4 (2018), and BIRDS-5 (2020), and has thus assisted more non-space-faring nations in building, launching, and operating, their first satellites. In this paper, we examine the impact of these CubeSat projects on each respective country. In each case, the goal is to kick off a sustainable national space program. Are these goals being achieved?

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85127539877&origin=inward

STORE AND FORWARD MISSION DESIGN IN BIRDS-4 SATELLITES 査読有り国際誌

Abbas Y.M.O., Sejera M., Bautista I.z., Cho M., Asami K.

International Geoscience and Remote Sensing Symposium (IGARSS) 2021-July 8030 - 8033 2021年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

One of the most reliable and effective options to approach disaster-affected areas or remote places is to utilize the satellite-based solutions. The store and forward (SFward) mission is developed to leverage this concept. In BIRDS-4 SFward mission, the satellites collect data from ground sensor terminals that contain specific data needed by an application and store it to an internal memory. When one of the satellites passes over the main ground station, it forwards the stored data. This mission can also be used to broadcast announcements from ground centers to distributed receivers from the amateur community. This is most useful during disasters where conventional terrestrial networks are down. The mission is useful for transmitting data from remote areas without ground-based networks, allowing the collection of data from these remote sites. This can be utilized to achieve many applications.

DOI： 10.1109/IGARSS47720.2021.9553025

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85126067275&origin=inward

A TEMPORAL ANALYSIS OF THE RELATIONSHIP BETWEEN SYNOPTIC WEATHER STATION AIR TEMPERATURE MEASUREMENT AND SATELLITE-DERIVED LAND SURFACE TEMPERATURE: A CASE STUDY IN PORT AREA, MANILA CITY, PHILIPPINES 査読有り国際誌

Purio M.A.C., Cho M., Yoshitake T.

International Geoscience and Remote Sensing Symposium (IGARSS) 2021-July 4640 - 4643 2021年01月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

This paper aims to assess the relationship between atmospheric temperature and land surface temperature (LST) in Manila City using satellite and synoptic weather station data from 2014 to 2018. Manila is the capital and second-largest city of the Philippines and one of the most densely populated cities in the world, so it is important to analyze the said parameters to give a better picture of the city heat situation. Atmospheric temperature is taken from the synoptic weather station measurements at Manila Port Area while land surface temperature was derived from MODIS satellite data at the same point. By analyzing the data, trend changes of the parameters can be obtained and observed. Using statistical correlation analysis, the relationship between the parameters were also established. Data shows that high air temperature measurements fall between March and May. Correlation analysis shows that Temperature measurement from weather data (Min, Max, Mean) and derived values from satellite data (LST Day & Night) mostly have a high positive correlation.

DOI： 10.1109/IGARSS47720.2021.9553724

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85125992885&origin=inward

CubeSatNet: Ultralight Convolutional Neural Network designed for on-orbit binary image classification on a 1U CubeSat 査読有り

Maskey A., Cho M.

Engineering Applications of Artificial Intelligence 96 2020年11月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

A 1U CubeSat has severe limitations on size, power and downlink capabilities. Transferring images taken by imaging payload from orbit can be a challenging. To save time and effort in downlinking and post-processing, a mechanism must be in place to sort quality data before transmitting it to the ground station. This paper presents an innovative approach combining a novel CubeSat image dataset and a lightweight Convolutional Neural Network architecture for automatically selecting images for downlink on a 1U CubeSat. Coined as CubeSatNet, the neural network is trained on 60,000 augmented images, is tiny enough to run on an ARM Cortex MCU and is tested on on-orbit data from Kyushu Institute of Technology's BIRDS-3 CubeSats with an accuracy of 90% and F1 score of 0.92. CubeSatNet outperformed SVM, DBN and AE trained to classify CubeSat images. If implemented, the CNN could cut down operation time by about 2/3 while significantly improving the quality of received data.

DOI： 10.1016/j.engappai.2020.103952

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85090913715&origin=inward

Difference in Discharge Threshold Voltage between Electron Beam and Ultraviolet Environment 査読有り国際誌

Kazuhiro Toyoda, Takaaki Sasaki, Mengu Cho, Mitsuru Ohkubo, Kazuyoshi Seki

Journal of Spacecraft and Rockets ( American Institute of Aeronautics and Astronautics ) 58 ( 3 ) 619 - 627 2020年10月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

In the discharge ground tests of satellites, an electron beam is mainly used to simulate the electron environment on geostationary orbit; however, the insulator is charged on the orbit by photoelectrons by vacuum ultraviolet rays during sunshine. Discharge occurs when the insulator surface exceeds the discharge threshold voltage. Whether the discharge threshold differs between the electron beam and the vacuum ultraviolet ray was experimentally investigated using a solar array coupon. As a result, the discharge threshold voltage was lower by about 1 kV when using vacuum ultraviolet light rather than when it was charged by using an electron beam. It was assumed that the electron beam was bent by the electric field at the edge of the solar cell, making it difficult to be charged, and detailed surface potential measurements were performed. As a result, a difference was observed in the surface charge distribution between the electron beam and vacuum ultraviolet light, and it was found that when the electron beam was used, the solar cell edge was less likely to be charged.

DOI： 10.2514/1.A34880

Scopus

その他リンク： https://arc.aiaa.org/doi/abs/10.2514/1.A34880?journalCode=jsr

HORYU-VI: International CubeSat Mission to Investigate Lunar Horizon Glow 査読有り国際誌

Necmi Cihan Orger, Mengu Cho, Omer Burak Iskender, Wee Seng Lim, Amal Chandran, Keck Voon Ling,King Ho Li Holden, Chee Lap Chow, John Bellardo, Pauline Faure, Fabio Santoni, Christian Circi, Paolo Marzioli, Federico De Grossi, Lorenzo Frezza, Kazuhiro Toyoda, Hirokazu Masui, Teramoto Mariko, Jose Rodrigo Cordova Alarcon, Takashi Yamauchi, Sangkyun Kim, Jian Wei Mark Lim, George Potrivitu, Matteo Laterza

71st International Astronautical Congress 2020年10月

Low-Thrust Trajectory Optimization for CubeSat Lunar Mission: HORYU-VI Trajectory 査読有り

Omer Burak Iskender, Sangkyun Kim, Keck Voon Ling, Mengu Cho, Necmi Cihan Orger

71st International Astronautical Congress 2020年10月

A Grid Square Statistical Approach in Data Organization for Urban Growth Impact Assessment on In-and-Outdoor Thermal Condition in Manila City, Philippines 査読有り国際誌

Mark Angelo C. Purio, Mengu Cho, Tetsunobu Yoshitake, Tsolmon Renchin

71st International Astronautical Congress 2020年10月

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