Korea Pathfinder Lunar Orbiter Magnetometer Instrument and Initial
                    Data Processing

Jo, Wooin; Jin, Ho; Park, Hyeonhu; Jang, Yunho; Lee, Seongwhan; Kim, Khan-Hyuk; Garrick-Bethell, Ian; Shin, Jehyuck; Baek, Seul-Min; Lee, Junhyun; Son, Derac; Kim, Eunhyeuk

doi:10.5140/jass.2023.40.4.199

Cited by 4 publications

(2 citation statements)

References 31 publications

(26 reference statements)

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“…It accommodates six payloads in total. The payloads include lunar terrain imager (LUTI) (Heo et al 2016), wide-angle polarimetric camera (PolCam) (Jeong et al 2017), KPLO gamma-ray spectrometer (KGRS) (Kim et al 2016), KPLO magnetometer (KMAG) (Jin et al 2017;Jo et al 2023), disruption tolerant network experiment payload (DTNPL) (Jo et al 2016;Lee et al 2022), and ShadowCam (Robinson et al 2017(Robinson et al , 2023Mahanti et al 2023). The Ground Segment, or KPLO deepspace ground system consists of Korea deep-space antenna , real-time operation subsystem , mission planning subsystem (Kim et al 2017), flight dynamics subsystem (FDS; Song et al 2021), image calibration & analysis subsystem (Yim et al 2023), science data management subsystem (Kim 2019).…”

Section: System Operation Designmentioning

confidence: 99%

Korea Pathfinder Lunar Orbiter (KPLO) Operation: From Design to Initial Results

Jeon,

Cho,

Kim

et al. 2024

J. Astron. Space Sci.

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Korea Pathfinder Lunar Orbiter (KPLO) is South Korea’s first space exploration mission, developed by the Korea Aerospace Research Institute. It aims to develop technologies for lunar exploration, explore lunar science, and test new technologies. KPLO was launched on August 5, 2022, by a Falcon-9 launch vehicle from cape canaveral space force station (CCSFS) in the United States and placed on a ballistic lunar transfer (BLT) trajectory. A total of four trajectory correction maneuvers were performed during the approximately 4.5-month trans-lunar cruise phase to reach the Moon. Starting with the first lunar orbit insertion (LOI) maneuver on December 16, the spacecraft performed a total of three maneuvers before arriving at the lunar mission orbit, at an altitude of 100 kilometers, on December 27, 2022. After entering lunar orbit, the commissioning phase validated the operation of the mission mode, in which the payload is oriented toward the center of the Moon. After completing about one month of commissioning, normal mission operations began, and each payload successfully performed its planned mission. All of the spacecraft operations that KPLO performs from launch to normal operations were designed through the system operations design process. This includes operations that are automatically initiated post-separation from the launch vehicle, as well as those in lunar transfer orbit and lunar mission orbit. Key operational procedures such as the spacecraft’s initial checkout, trajectory correction maneuvers, LOI, and commissioning were developed during the early operation preparation phase. These procedures were executed effectively during both the early and normal operation phases. The successful execution of these operations confirms the robust verification of the system operation.

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Section: System Operation Designmentioning

confidence: 99%

Korea Pathfinder Lunar Orbiter (KPLO) Operation: From Design to Initial Results

Jeon,

Cho,

Kim

et al. 2024

J. Astron. Space Sci.

Self Cite

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“…However, magnetic cleanliness is not always feasible, especially for low cost or mass produced spacecraft such as CubeSats. The second method is gradiometry, which uses two or more magnetometers to estimate and remove the interference signals (Jo et al, 2023;Kivelson et al, 2023;Lee et al, 2023). Ness et al (1971) proposed a gradiometry algorithm that assumes the spacecraft magnetic field as a dipole and removes it using the gradient between two magnetometers placed collinearly on a boom.…”

Section: Introductionmentioning

confidence: 99%

MAGPRIME: An Open‐Source Library for Benchmarking and Developing Interference Removal Algorithms for Spaceborne Magnetometers

Hoffmann,

Moldwin,

Imajo

et al. 2024

Earth and Space Science

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Magnetometers are essential instruments in space physics, but their measurements are often contaminated by various external interference sources. In this work, we present a comprehensive review of existing magnetometer interference removal methods and introduce MAGPRIME (MAGnetic signal PRocessing, Interference Mitigation, and Enhancement), an open‐source Python library featuring a collection of state‐of‐the‐art interference removal algorithms. MAGPRIME streamlines the process of interference removal in magnetic field data by providing researchers with an integrated, easy‐to‐use platform. We detail the design, structure, and functionality of the library, as well as its potential to facilitate future research by enabling rapid testing and customization of interference removal methods. Using the MAGPRIME Library, we present two Monte Carlo benchmark results to compare the efficacy of interference removal algorithms in different magnetometer configurations. In Benchmark A, the Underdetermined Blind Source Separation (UBSS) and traditional gradiometry algorithms surpass the uncleaned boom‐mounted magnetometers, achieving improved correlation and reducing median error in each simulation. Benchmark B tests the efficacy of the suite of MAGPRIME algorithms in a boomless magnetometer configuration. In this configuration, the UBSS algorithm proves to significantly reduce median error, along with improvements in median correlation and signal to noise ratio. This study highlights MAGPRIME's potential in enhancing magnetic field measurement accuracy in various spacecraft designs, from traditional gradiometry setups to compact, cost‐effective alternatives like bus‐mounted CubeSat magnetometers, thus establishing it as a valuable tool for researchers and engineers in space exploration and magnetism studies.

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Operational Tests for Delay-Tolerant Network between the Moon and Earth Using the Korea Pathfinder Lunar Orbiter in Lunar Orbit

Kim,

Han,

Har

2024

Electronics

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The Korea Pathfinder Lunar Orbiter (KPLO) was launched on 5 August 2022, equipped on the SpaceX Falcon 9 launch vehicle. At present, the KPLO is effectively carrying out its scientific mission in lunar orbit. The KPLO serves as a cornerstone for the development and validation of Korean space science and deep space technology. Among its payloads is the DTNPL, enabling the first-ever test of delay-tolerant network (DTN) technology for satellites in lunar orbit. DTN technology represents a significant advancement in space communication, offering stable communication capabilities characterized by high delay tolerance, reliability, and asymmetric communication speeds—a necessity for existing satellite and space communication systems to evolve. In this paper, we briefly give an overview of the Korea Lunar Exploration Program (KLEP) and present scientific data gathered through the KPLO mission. Specifically, we focus on the operational tests for DTN-ION conducted for message and file transfer, as well as real-time video streaming, during the initial operations of the KPLO. Lastly, this study offers insights and lessons learned from KPLO DTNPL operations, with the goal of providing valuable guidance for future advancements in space communication.

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Korea Pathfinder Lunar Orbiter Magnetometer Instrument and Initial Data Processing

Cited by 4 publications

References 31 publications

Korea Pathfinder Lunar Orbiter (KPLO) Operation: From Design to Initial Results

Korea Pathfinder Lunar Orbiter (KPLO) Operation: From Design to Initial Results

MAGPRIME: An Open‐Source Library for Benchmarking and Developing Interference Removal Algorithms for Spaceborne Magnetometers

Operational Tests for Delay-Tolerant Network between the Moon and Earth Using the Korea Pathfinder Lunar Orbiter in Lunar Orbit

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