Overview of KOMPSAT-5 program, mission, and system

Lee, Sang-Ryool

doi:10.1109/igarss.2010.5652759

Cited by 34 publications

(21 citation statements)

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“…The primary missions of KOMPSAT-5, called GOLDEN, are as follows: -Geographic information system (GIS) -Ocean management -Land management -Disaster monitoring -ENvironment monitoring The secondary mission of KOMPSAT-5 is to generate an atmospheric sounding profile and support global positioning system (GPS) radio occultation using atmosphere occultation and precision orbit determination (OD) [1]. KOMPSAT-5 is to be inserted into a 550 km altitude circular dawn-dusk orbit with a 97.6-degree inclination in 2011.…”

Section: Introductionmentioning

confidence: 99%

“…The spacecraft was built by the Korea Aerospace Research Institute (KARI), while the mission control element (MCE) system for operating the satellite on the ground was developed by the Electronics and Telecommunications Research Institute (ETRI). The primary missions of KOMPSAT-5, called GOLDEN, are as follows: -Geographic information system (GIS) -Ocean management -Land management -Disaster monitoring -ENvironment monitoring The secondary mission of KOMPSAT-5 is to generate an atmospheric sounding profile and support global positioning system (GPS) radio occultation using atmosphere occultation and precision orbit determination (OD) [1]. Figure 1 shows KOMPSAT-5 at a nominal attitude in 'rightlooking' mode.…”

Section: Introductionmentioning

confidence: 99%

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GPS-Based Orbit Determination for KOMPSAT-5 Satellite

Hwang¹,

Lee²,

Kim³

et al. 2011

ETRI J

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Korea Multi‐Purpose Satellite‐5 (KOMPSAT‐5) is the first satellite in Korea that provides 1 m resolution synthetic aperture radar (SAR) images. Precise orbit determination (POD) using a dual‐frequency IGOR receiver data is performed to conduct high‐resolution SAR images. We suggest orbit determination strategies based on a differential GPS technique. Double‐differenced phase observations are sampled every 30 seconds. A dynamic model approach using an estimation of general empirical acceleration every 6 minutes through a batch least‐squares estimator is applied. The orbit accuracy is validated using real data from GRACE and KOMPSAT‐2 as well as simulated KOMPSAT‐5 data. The POD results using GRACE satellite are adjusted through satellite laser ranging data and compared with publicly available reference orbit data. Operational orbit determination satisfies 5 m root sum square (RSS) in one sigma, and POD meets the orbit accuracy requirements of less than 20 cm and 0.003 cm/s RSS in position and velocity, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

GPS-Based Orbit Determination for KOMPSAT-5 Satellite

Hwang¹,

Lee²,

Kim³

et al. 2011

ETRI J

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“…Its bus modular design is based on the heritage of KOMPSAT-2, which is parallel integration of the payload, spacecraft bus and propulsion equipment. 8 Mission orbit of KOMPSAT-5 is a sun-synchronous and dawn-dusk orbit which retraces its ground track after 421 revolutions during 28days at 550 kilometers in altitude, inclined 97.65 degrees. In addition, orbit period is about 95 minute and LTAN is 06:00.…”

Section: Figure 1 Korea's Space Programmentioning

confidence: 99%

Case Study of Exceptional Conditions in Precision Orbit Determination of KOMPSAT Series for Robustness and Timeliness

Kim

Jung

Yim

et al. 2016

SpaceOps 2016 Conference

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Korea Aerospace Research Institute (KARI) has been conducting the satellite mission operations for Korea Multi-Purpose Satellite (KOMPSAT) series. Flight dynamics functions of KOMPSAT series operation include comprehensive orbital analysis and mission planning support as well as orbit data distribution for image processing by conducting Operational Orbit Determination (OOD), Orbit Prediction (OP), Orbit Maneuver Planning (OMP), Ground Track Maintenance (GTM) and Precision Orbit Determination (POD). Precise orbit of KOMPSAT series was estimated and released on a daily basis. POD processing of KOMPSAT was using the Global Positioning System (GPS) measurements including pseudo-range and carrier phase measurement data from onboard GPS receivers. In flight dynamics operations, the accuracy of POD was evaluated by the root-mean square error of daily POD ephemeris in comparison with previous POD ephemeris using overlapping method. But, sometimes, POD accuracy does not meet its requirements due to the various erroneous sources, which include data unavailability or defective data in GPS ephemeris and International GNSS Service (IGS) Station information. In this paper, exceptional cases of POD processing are thoroughly analyzed to reduce data latency for robustness of software in terms of satellite operations. For this purpose, flight dynamics team rebuilds the POD processing flow in more efficient way and add an additional correction steps to provide the quality-controlled orbit ephemeris. The high-fidelity proven capabilities for POD processing provided by commercial software such as MicroCosm and in-house algorithms are extensively used for this purpose. Finally, POD data accuracy of KOMPSAT series is improved and data latency is reduced than previous workflow. It could be reference to setup an operational strategy for the POD processing in terms of robust orbit data processing and rapid data provision.

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“…We made a performance comparison between the QPSO and two other algorithms, the GA and the conventional PSO. The results of the antenna pattern synthesis and the performance analysis were evaluated and validated using the design parameters of active phased array antennas for Korea Multipurpose Satellite-5 (KOMPSAT-5) [9], which was successfully launched in 2013 and is currently operating normally in orbit.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Spaceborne SAR Using Antenna Pattern Synthesis Based on Quantum-Behaved Particle Swarm Optimization

Won

Lee

2017

International Journal of Antennas and Propagation

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This study improves the performance of a spaceborne synthetic aperture radar (SAR) system using an antenna mask design method and antenna pattern synthesis algorithms for an active phased array SAR system. The SAR antenna is an important component that affects the SAR system performance because it is closely related to the antenna pattern. This study proposes a method for antenna mask design that is based on several previous studies as well as the antenna pattern synthesis algorithm, which is based on quantumbehaved particle swarm optimization (QPSO) for an active phased array SAR system. The performance of the designed antenna masks and synthesized patterns demonstrate that the proposed mask design method and antenna pattern synthesis algorithm based on QPSO can be used to improve the SAR system performance for spaceborne applications.

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Overview of KOMPSAT-5 program, mission, and system

Cited by 34 publications

References 0 publications

GPS-Based Orbit Determination for KOMPSAT-5 Satellite

GPS-Based Orbit Determination for KOMPSAT-5 Satellite

Case Study of Exceptional Conditions in Precision Orbit Determination of KOMPSAT Series for Robustness and Timeliness

Performance Improvement of Spaceborne SAR Using Antenna Pattern Synthesis Based on Quantum-Behaved Particle Swarm Optimization

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