• Journal of Digital Convergence
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• v.13 no.2
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• pp.193-204
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• 2015

An array DBMS has been expected widely from scientists because it is convenient to store and analyze the data of array type. In this paper, we describe how to handle satellite remote-sensing images in the array DBMS. However, previous works in their visualization have two problems as follows. First, the images are visualized as a state of distorted by the curvature of the earth. Second, it is difficult to apply the results of visualization by pre-written queries to other analyses. Therefore, this paper proposes a three dimensional visualization method of satellite remote-sensing images, not traditional 2D visualization. Our research contents are as follows. First, we describe how to store, process, and analyze the satellite remote-sensing images in the array DBMS. Second, we propose a three-dimensional visualization method for their processed outputs. Lastly, our contributions can be summarized that we propose a method of handling satellite remote-sensing images in the array DBMS and their 3D visualization techniques. It is also expected that their use be available widely in many industrial areas.

• Current Industrial and Technological Trends in Aerospace
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• v.9 no.1
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• pp.45-54
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• 2011

Earth observation satellites data apply to various fields and global satellite imagery market continues to expand with increasing the scale according to the developed satellites. Sudden natural disasters frequently have occurred in Japan. ALOS satellite data support to repair the damaged area and mitigate the disasters in Japan as well as all around the world. In this paper, the status of remote sensing and data policy in Japan are described. In addition, satellite-based remote sensing technology effectively contribute to the public sector and related support to establish the infra system of satellite application promotion has been investigated.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.251-256
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• 2004

This paper will show examples and methods of spatial relationship operations that extract spatial information from satellite images. Geographical information system phenomena of complex and variant real world can abstract and implement simple features. The abstract features classify geo_objects and geo_field. The geo_object and the geo_field can represent vector and raster respectively. The raster based satellite image can use remote sensing applications. This paper needs topology operations and geometric operations for extracting the remote sensing. The spatial information transforms the raster based image to the vector based object, and extract from the spatial information. The extracted information will contribute on the application of the remote sensing satellite images.

• Current Industrial and Technological Trends in Aerospace
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• v.4 no.1
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• pp.92-99
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• 2006

지구관측위성을 통해 획득되는 다양한 원격탐사 자료는 정부 및 공공기관 등 공공의 업무에 매우 유용한 각종 주제정보를 제공하며, 이는 상업적 지구관측 자료의 활용 및 판매 증대 등으로 나타나고 있다. 그러나 이와 같은 위성원격탐사 자료를 이용하여 생성되는 다양한 주제정보는 그 신뢰성에 대한 명확한 검증작업을 거친 후에야 활용이 가능하다. 이를 위하여 우주개발 선진국의 경우 위성발사 초기단계에서부터 주기적으로 영상자료에 대한 검․보정 활동을 체계적으로 수행함과 동시에 그 활용 결과물을 검증하고 실제 적용하기 위한 다양한 지상 검증 사이트를 구축하여 운영하고 있다. 본 논문에서는 해외 위성영상 활용 검증 사이트의 구축 현황과 운영 실태 등에 대하여 서술하고자 한다.

• Korean Journal of Remote Sensing
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• v.16 no.1
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• pp.47-54
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• 2000

We compared the satellite observed temperature with the radiosonde observed temperature in the Korean Peninsula. The radiosonde observed data were obtained from four upper air observation stations in the Korean Peninsula from 1981 to 1998, and were compared with the satellite observed data of the channel-2 and channel-4 of microwave sounding unit(MSU) on board NOAA series of polar-orbiting satellites. The radiosonde data were reconstructed from radiosonde T$_b$ using MSU weighting function. The monthly climatology shows radiosonde T$_{b2}$ is higher than MSU T$_{b2}$ in summer. The correlation between MSU T$_{b2}$ and radiosonde T$_{b2}$ is 0.72-0.76 and 0.73-0.81 between MSU T$_{b4}$ and radiosonde T$_{b4}$. The T$_{b2}$ show a positive trend and the T$_{b4}$ has a negative trend during the 18 years.

• Proceedings of the KSRS Conference
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• 2000.04a
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• pp.26-30
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• 2000

위성에 의한 탁수 원격탐사 알고리즘 개발을 위하여 탁수발생 해역의 remote reflectance를 광합성 색소인 클로로필, 부유물, 용해유기물 농도 등으로 모델화 하였다. 반사도 모델 검정하기 위하여 현장의 관측 값과 비교하였으며, 반사도 모델에 의한 알고즘과 현장에서 얻어진 통계적 관계와 비교하였다. 모델의 탁도 알고리즘과 현장의 탁도 알고리즘 사이에는 조금의 차이가 있었으나 거의 유사한 결과를 얻을 수 있었다. 개발된 알고리즘을 SeaWiFS 위성자료에 적용하여 한 빈도 주변해역의 해수 탁도를 분석한 결과 현장 관측치와 잘 일치하는 아주 우수한 결과를 보여주었다.

• Korean Journal of Remote Sensing
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• v.14 no.2
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• pp.137-148
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• 1998

An algorithm developed for the precision correction of high resolution satellite images is introduced in this paper. In general, the polynomial warping algorithm which derives polynomial equations between GCPs extracted from an image and a base map requires many GCPs well-distributed over the image. The precision correction algorithm described in this paper is based on a sensor-orbit-Earth geometry, and therefore, it is capable of correcting a raw image using only 2-3 GCPs. This algorithm estimates the errors on the orbit determination and the attitude of the satellite by using a Kalman filter. This algorithm was implemented, tested and integrated into the KITSAT-3 image preprocessing software.

• Proceedings of the KSRS Conference
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• 2006.03a
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• pp.109-112
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• 2006

2002년 발사 된 GRACE (Gravity Recovery and Climate Experiment)는 미국과 독일 합작으로 개발된 지구중력장 측정 전용 위성으로 동일한 궤도를 비행하는 두 개의 위성 사이 거리 변화를 측정하여 지구 중력장을 추정하는 사업이다. GRACE 위성의 핵심 관측기인 위성간 거리측정기의 원리에 대해 소개하고, 운용 현황 및 성능에 대해 소개하였다. 발사 전 성능 분석 단계에서 고려되지 못했던 거리측정기 오차 요인에 대해 분석하고, 향후 연구 방향을 제시하였다.

• Proceedings of the KSRS Conference
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• 2000.04a
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• pp.2-8
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• 2000

2000년 6월부터 정상관측 활동을 시작하는 다목적실용위성 1호 영상자료 및 과학관측 자료의 공공 및 상업적 활용 극대화를 위하여 위성자료 배포에 따른 문제, 즉 공공 및 상용분야에 대한 자료배포 방안에 관한 기본원칙을 설정할 필요성이 대두되었다. 이에 따라 항공우주연구소에서는 다목적실용위성 1호의 자료활용 정책, 위성의 운영방안, 배포방안, 공공 및 상용배포, 가격정책 등에 관한 자료보급 규정을 제정하여 효율적인 자료배포 체계를 구축하고자 한다.

• Korean Journal of Remote Sensing
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• v.13 no.1
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• pp.31-46
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• 1997

In recent years, as remotly-sensed image processing technologies have been improved and spread widely in the application areas, many new requirements for the image processing technologies have arisen. However, it is difficult and costly to access remotely-sensed image processing systems. Moreover, these systems have thier own processing facilities which are not easily accessible for general users. In this paper, those problems are challenged by adopting Internet as a universal information network for accessing remotly-sensed image DBMS and by allowing users to work remotely on the image processing. A remotly-sensed image processing system which can be accessed via Internet was designed and implemented. This system can be used to manipulate images over remote DBMS. The Illustra object-oriented relational DBMS with CGI(Common Gateway Interface) web interface was used in this project. The client consists of a WWW(World Wide Web) Netscap$e^{TM}$ browser, and the server consists of HTTPD(Web daemon), Illustra DBMS and Java modules in order to process the image being displayed. The developed system was tested on LAN environment and the service response time met the requirements.