• Defense and Technology
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• no.10 s.284
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• pp.62-73
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• 2002

현재 군에서 사용 중인 통신위성의 활용현황은 무궁화 위성 2호 트랜스폰더(Transponder) 1조를 임대하여 상용휴대용, 차량용, 해상용, 공중용 단말기를 이용하여 운용중에 있으며, 해사통신위성(INMARSAT)을 활용하여 원거리 통신망으로 운용중에 있다. 그러나 이와 같은 위성통신 체계만으로는 한반도 지역의 미래전장을 주도적으로 이끌어 갈 수 있는 지휘통제통신체계를 구현할 수 없기에 앞으로 개발 될 위성통신체계에 대한 사용자, 즉 군의 운용관점에서 요구사항을 식별하여 제시하고자 한다.

• Electronics and Telecommunications Trends
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• v.12 no.1 s.43
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• pp.73-89
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• 1997

최근 세계의 통신 방송위성시장은 intelsat/inmarsat의 개혁, 민간위성시스템의 참여 확대, 글로벌 이동체위성시스템의 등장, 디지털위성방송서비스 보급, 국제적인 시장개방에 따른 경쟁확대 등 급속한 변화를 보이고 있다. 본 고에서는 해외 주요국가의 위성통신 방송과 관련한 정책을 살펴보고 아울러 관련 서비스 시장과 발사체 시장을 전망한다.

• Journal of Astronomy and Space Sciences
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• v.10 no.1
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• pp.1-16
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• 1993

Three typer of spin-axis attitude determination program for the geosynchronous transfer orbit spacecraft are developed. Deterministic closed-from algorithm, batch least-square algorithm and stabilized Kalman filter algorithm are used for implemetation of three programs. EUROSTAR bus model from British Aerospace is used for attitude sensor modelling. Attitude determinations using three programs are performed for the simulated sensor data according to INMARSAT 2-F1 prelaunch mission analysis.

• Defense and Technology
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• no.11 s.285
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• pp.62-73
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• 2002

현재 군에서 사용 중인 통신위성의 활용현황은 무궁화 위성 2호 트랜스폰더(Transponder) 1조를 임대하여 상용휴대용, 차량용, 해상용, 공중용 단말기를 이용하여 운용중에 있으며, 해사통신위성(INMARSAT)을 활용하여 원거리 통신망으로 운용중에 있다. 그러나 이와 같은 위성통신 체계만으로는 한반도 지역의 미래전장을 주도적으로 이끌어 갈 수 있는 지휘통제통신체계를 구현할 수 없기에 앞으로 개발 될 위성통신체계에 대한 사용자, 즉 군의 운용관점에서 요구사항을 식별하여 제시하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.81-85
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• 2008

The INMARSAT is able to long range maritime communications that can not use for expensive charge in small ship. Additional an opinion of unuseful NBDP that is international discussion for replacement methods for the effective data communications by using HF band. A feature of HF band communication is ionospheric propagation that have not the distance question as A2, A3 and A4 sea areas. Therefore all navigation ship should has supplied service such as MSI, VMS, E-mail beside of distress and public communication that is demanded a design of communication sequence for using SSB transceiver. This paper has designed the new packet and communication sequence of truly and automatically radio link for maritime data communications by SSB in HF band.

• Journal of Advanced Navigation Technology
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• v.19 no.5
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• pp.354-362
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• 2015

In this study, for integrated management and inter-exchange of operational data generated by ships and land-side information on safe and business, a vessel communication system with modular functions was designed that applied high efficiency compression, least-cost algorithms and Inmarsat FBB connection automation system. Performance test at the KTsat Kumsan satellite earth station; system was found to delivered an average transfer speed of 7 kB/S, which was significant improvement from the existing commercial product's average speed of 5 kB/S. It also delivered twice the efficiency of the existing product in terms of compression rate and transfer of the most widely used office files in maritime businesses.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.8
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• pp.1241-1250
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• 2002

The communication between Ship and Land have bad communication environment and high cost comparing with land situation. In case of data communication for I-mail, the primary used speed is from 4800 bps to 9600bps. even this low speed user has difficulty to use data communication because of high cost. and this kind of data communication software is all imported from foreign country. In this paper we designed and implemented this communication server and client using Inmarsat A/B/miniM/M4/GAN(F77) by benchmarking of foreign product like Netverk, Marinet, Amosmail. the focus of this product is like next 1) communication cost down 2) Link between Ship Application and Land Office Application 3) Convenient of usage in Ship 4) perfect management of message to from ship.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.6
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• pp.1365-1374
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• 2010

The maritime traffic is more complex these days. It is more hard for the small fishing ships to navigated in shores. The requirements for the navigate information system to protect the sea environments and support the small fishing ships are more increased. However, the Inmarsat communication system is too burden to the fishermen with the expensive terminal and call fees. We propose the wireless digital fishing information network which use the existing MF/HF SSB communications system by connecting I-PHONE, PDA, NetBook, Notebook, PC, etc with the PSK31 method and AIS(Automatic Identification System) on the MF/HF radio Band.

• Journal of Navigation and Port Research
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• v.28 no.5
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• pp.449-454
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• 2004

These days ships medical treatment is under unfavorable circumstances, because there is no professional doctor who can diagnose and treat the patients accurately on the ships. Therefore, ship's telemedicine should be urgently actualized to elevate the crew's my of boarding life and welfare. A purpose of this research is to develope the telemedicine system which can acquire the patient's informations like ECG and phonocardiogram used for the diagnosis and transmit those to the doctors of shore medical center. In this paper, we designed the communication part which could transmit the bio-signals acquired from the developed ship's digital ECG and stethoscope based on personal computer by the INMARSAT Also we inspected data errors through the comparison between the sent and received data And we confirmed the possibility and compatibility of the telemedicine using ship's communication system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.10a
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• pp.153-158
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• 2007

The INMARSAT is able to long range maritime communications that can not use for expensive charge in non-SOLAS ship. Therefore, international discussion for the question that replacements use of MF/HF band for maritime distress and safety communications in maritime. HF data communications system may be effectively utilized for SOLAS ships as well as for the existing non-SOLAS vessels including the fishing boats, which navigate A2 and A3 sea areas. The HF data communications may have various functions such as e-mail services, broadcasting services of up-to-date information related to marine safety, position reporting services, polling services etc. However, the present HF e-mail communications protocols have a problem of increasing calling redundancy as the number of channels in operation increases. This paper new protocol and communication sequence proposed in this submission establishes a proper radio link automatically and adaptively by taking channel traffic into account.