Techavijit, Pirada

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Techavijit, Pirada
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Email
pirada.te@kmitl.ac.th

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Now showing 1 - 7 of 7
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    Power Requirements for Battery Maintenance and Temperature Profile on High Altitude Platform
    (2024-01-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    ;
    Wongphuangfuthaworn, Natthapong
    ;
    Iamsawat, Jakkrit
    Experiments on high-altitude platform (HAP) at the nearspace must be faced with extremely low temperatures, reaching as low as -50 degrees Celsius, which exceeds the operational range of electronic systems. Especially, the battery that requires a heating system and thermal insulation. This paper will report temperature profile on the HAP flight and the results of experiments with the installation of the heating system to determine its adequacy, and measuring the electrical power needed for heating.
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    Simplified Design and Development of Radio-Tracking on Thai-Traditional Rocket (Bang Fai) With Real Case Experiments
    (2023-01-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    Thousands of large-scale homemade rockets (Bang Fai) are fired during Thai rocket festival annually. To prevent harm to airspace and ground, this paper proposes the design and development of a radio-tracking system that can report the velocity and altitude in real-time. The design is simplified with its small size and inexpensive price but still works with the rocket's dynamics. This paper also reports the results of rockets' ascent/descent velocities and their altitudes from tracking system mounted on the rockets. All this data can be used for evaluating the airspace and ground risks and for improving the design for future developments.
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    Potential of Photovoltaic on Small Stratospheric Satellite in Real-World Experiment
    (2023-01-01)
    Techavijit, Pirada
    ;
    Wongphuangfuthaworn, Natthapong
    ;
    Sukchalerm, Polkit
    ;
    Plodpai, Aniwat
    This paper investigates the potential of monocrystalline photovoltaic (PV) panels to generate power when installed on stratospheric satellites through near-space flight experiments conducted at altitudes of 0-23 kilometers above sea level. It also compares the results with a mathematical model developed by ASHRAE in previous research, which reveals the differences caused by various factors such as atmospheric attenuation and high-level clouds. The main objective of this study is to identify the optimal altitude for deploying stratospheric satellites with appropriately sized PV panels that can generate sufficient power to meet the communication system's requirements for long-term operation.
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    Fly-around-the-World Near-Space Picosatellite for Cost-Effective School Space Projects
    (2024-07-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    ;
    Wongphuangfuthaworn, Natthapong
    ;
    Kiyapaet, Sureepon
    This research presents the design and development of a near-space picosatellite platform intended to operate at high altitudes between 20–40 km above sea level. These picosatellites function similarly to orbital satellites but float and travel with the wind in the atmosphere instead of orbiting the Earth. The platform utilizes a super-pressure balloon to provide buoyancy, allowing the picosatellite to remain airborne and operational for several days to months, capable of flying around the world multiple times. This study focuses on the cost-effective design of high-altitude platforms, telecommunication systems, and energy consumption for the picosatellite, enabling it to communicate with ground stations from anywhere in the world while consuming low power. The use of common COTS (Commercial Off-The-Shelf) equipment aims to enhance accessibility for educational applications. This research gathered data from our previous studies for over 20 high-altitude platform flights, analyzed the necessary factors for whole system design, and developed a new prototype that has been successfully built and tested.
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    Communication Link Margin Design for Picosatellite operating on HAP
    (2024-01-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    This paper examines the testing of Picosatellites on Highaltitude Platforms (HAPs), conducting experiments to collect data at stratosphere or near-space. This involves long-distance over hundreds of kilometers telecommunication between ground stations and HAP. This paper will suggest designing an appropriate link margin from ground to Picosatellites on HAPs, by utilizing data from actual experiments for analysis and presentation.
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    Under ∃300 Anti-drone gun with GPS spoofing technique using COTS
    (2024-01-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    ;
    Pitchsanupun, Montawat
    ;
    Kijatanath, Natcha
    This research presents the development of a cost-effective anti-drone gun. The system utilizes Commercial Off-The-Shelf (COTS) components for scalability and rapid development. The system employs GPS spoofing using Software-Defined Radio (SDR) devices, offering a straightforward and energyefficient solution compared to other complex anti-drone techniques. The prototype successfully manipulates coordinates, tricking commercial drones into autonomously landing in designated zones, showcasing a practical and resource-efficient approach to drone deterrence.
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    Cost-Effective Satellite Ground Stations in Real-World Development for Space Classrooms
    (2025-02-01)
    Techavijit, Pirada
    ;
    Sukchalerm, Polkit
    This paper presents the development and outcomes of a cost-effective satellite ground station designed as a learning tool for satellite communication and wireless communication education. The study investigates accessible satellites and the methods for accessing them. The developed ground station has the capability to access satellites in the V, U, and L frequency bands, allowing it to receive a variety of satellite data. This includes full-disk meteorological images, high-resolution multispectral images, and scientific data from payloads of satellites in both low Earth orbit (LEO) and geostationary orbit (GEO). The ground station demonstrates capabilities similar to those of large organizations but at a significantly lower cost. This is achieved through a process of identifying educational requirements and optimizing the system for cost-efficiency. This paper presents the design demonstration, actual construction of the ground station, and results. Additionally, it compiles characteristics from real signal reception experiences from various satellites.
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