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Sachasiri R.,Geo Informatics and Space Technology Development Agency GISTDA
62nd International Astronautical Congress 2011, IAC 2011 | Year: 2011

Satellite operators find downtime unacceptable due to the limited lifetime of the satellite. Every minute that the satellite is not doing its work means loss in revenue. Failure of ground station equipments result in loss that might have been avoided by good maintenance. However, there are times when failures are unpredictable and the operator may not all the spare parts available. The goal of ground station sharing between earth observation satellite operators is to help overcome this obstacle - with minimum cost. The paper shall discuss the cooperation to share ground station resources between Geo-Informatics and Space Development Agency (GISTDA), Thailand and National Space Organization (NSPO), Taiwan in order to build partnerships and reduce operating costs. Both the agencies have gained immensely from this joint venture. In fact, GISTDA has operated the Thailand Earth Observation Satellite (THEOS) for seventy-two days using only NSPO's ground station in Taiwan. The setup process, both bureaucratic and technical, may be difficult but the outcome is very rewarding. Furthermore, this cooperation can easily grow from two partners to a pool of members who are always contributing various ground station resources to the pool when they do not need it. Members of the pool are then free to use these available resources as per their convenient. Naturally, resource management is done to optimize the available resources. This way, every member can aim to accomplish one hundred percent daily satellite access during its lifetime. Any ground station failure can be compromise by using another ground station, at minimum operating cost. Copyright ©2010 by the International Astronautical Federation. All rights reserved. Source

Techavijit P.,Geo Informatics and Space Technology Development Agency GISTDA
62nd International Astronautical Congress 2011, IAC 2011 | Year: 2011

THEOS (THailand Earth Observation Satellite), Thailand's First Earth observation satellite on Low Earth Orbit (LEO), was launched on 1st October 2008 and is fully operated by GISTDA(Geo-Informatics and Space Technology Development Agency) at the control ground station located in Siracha, Chonburi Province. Satellite monitoring and controlling are the main responsibility of Mission Control Division (MCD). MCD engineers' roles are to perform Telemetry downlink in order to acquire Housekeeping Data and Telecommand uplink in order to send mission program and specific operational commands to the satellite via control ground software. These require precise operations within each visibility (lasts approximately 10 minutes). Therefore all MCD engineers need to be well trained and passed through numerous qualification processes. In order to assist the engineer and to reduce human error, specific templates of procedures were used while preparing commands and recording real time monitoring of satellite parameters. However there were still errors from data searching in limited time, error in log book recording due to the different standard of operators. Other constraints included data storage area and operational bring discrepancy. To address these issues, MCD engineers have developed an active tool to prepare a set of commands and record real time satellite parameters in electronic form. This software is also capable of estimating duration which guarantees secure operation of command uplink. All operational data are then archived in electronic database system that allows quick access. MCD engineers also implement new features for security by improving the existing satellite control software to run consistently with existing satellite control software in order to reduce risk of single event upset. These implement projects are designed for supporting THEOS-1 and upgrading with new feature for THEOS-2 in the future. Copyright © 2011 by the International Astronautical Federation. All rights reserved. Source

Longepe N.,Collecte Localisation Satellites CLS | Rakwatin P.,Geo Informatics and Space Technology Development Agency GISTDA | Isoguchi O.,Japan Aerospace Exploration Agency | Shimada M.,Japan Aerospace Exploration Agency | And 2 more authors.
IEEE Transactions on Geoscience and Remote Sensing | Year: 2011

From its launch in 2006, the phased array L-band synthetic aperture radar (PALSAR) onboard the advanced land observing satellite (ALOS) has acquired many dual-polarized (FBD) images with a 70-km swath width, aiming to produce spatially consistent coverage over tropical rainforest. This paper investigates the relevancy of PALSAR orthorectified FBD product at 50-m resolution for regional land cover classification by the support vector machines (SVM). Our test site is the Riau province, Sumatra island, Indonesia, known to hold vast area of natural peatland forest with an extreme biodiversity threatened by industrial deforestation. Since it is demonstrated the radiometric information (HH and HV channels) cannot be solely used to achieve a good classification, the spatial information in these orthorectified data is investigated. A new tool using the recursive feature elimination SVM-based process and the textural Haralick's parameters is introduced. The real contribution of textures within the land cover classification can be understood. A small set of textural parameters is determined at local scale while being optimal for the land cover discrimination. The SVM-based classifier is carried out across the whole Riau province and its results are compared with a Landsat-based estimation. The agreement is over 70% with six classes and 86% for the natural forest map. These results are remarkable since only one PALSAR FBD product is used and this assessment is performed on more than 40 million pixels. The results confirm the high potential of the PALSAR sensor for forest monitoring at regional, if not global scale. © 2011 IEEE. Source

Sachasiri R.,Geo Informatics and Space Technology Development Agency GISTDA
Proceedings of the International Astronautical Congress, IAC | Year: 2012

The Space Krenovation Park (SKP), Thailand's first science park concentrating on space technology development, is a brainchild project of the current management of the Geo-Informatics and Space Technology Development Agency (GISTDA). The SICP has been initiated to strengthen GISTDA's two-pronged strategy - To induce value creation and bring about social benefits. The SKP is being set up at the current Thaichote (THEOS) ground station in Siracha, Chonburi. Keeping in line with the organization's strategy, the SKP, in order to bring about value creation, will provide several services to accelerate economic and knowledge growth in Thailand. The SKP will host a business incubation center for entrepreneurial development as well as a technology-training center for personnel development. The Board of Investment of Thailand (BOI) has also promised to provide momentum to the project by providing financial incentives in term of special tax structures and soft loans for companies to set up in the SKP. With the possibility that new local companies setting up and more players entering the local space industry, sustainable development can be guaranteed. On the other hand, in order to bring about social benefits, GISTDA is leveraging the SKP to include a Space Technology Development Center and to be the Research and Development center for future ASEAN space activities. This will be set up side by side with the Visionarium, a Space Knowledge Center, which shall provide knowledge and infotainment to the general public through exhibits and outreach programs. Therefore, the four pillars of the SKP - Business Incubation Center, Space Technology Center, Space and Geo-Informatics System (GIS) Training Center and the Visionarium - Are the tools for the development of the space industry in Thailand. Copyright © (2012) by the International Astronautical Federation. Source

Nilnarong T.,Geo Informatics and Space Technology Development Agency GISTDA
International Conference on Space Science and Communication, IconSpace | Year: 2013

Solar activities cast impacts on the operations of satellites in several aspects of the orbit mechanics segment. These impacts include the precision of orbit determination, the number of necessary station keeping maneuvers, and the awareness of close-approaches with space objects. All of which affect the mission, the lifetime of satellite, as well as the risk of collision with space debris. The purpose of this study is to examine the extent of these impacts on the THAICHOTE satellite and present the practical solutions which are implemented in daily operations. The results of this study will be useful for the design the in-house orbit determination software currently under development. © 2013 IEEE. Source

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