LAPAN-TUBSAT is the first generation of LAPAN satellite program which is developed by technology collaboration between LAPAN and TU Berlin, German. As a surveillance satellite, LAPAN-TUBSAT has ability to observe the earth surface until 5 meter ground resolution by using analog video camera. Utilization of this satellite to observe the strategic location entire Indonesia in real time has not been done thoroughly. Therefore the technical upgrading of the Ground Station in strategic areas such as border areas, the National/International cruise line and National vital objects should be improved. One of the strategic areas of Indonesia is the region of Malacca Strait which is the area of International shipping waterway and border of 4 countries; Indonesia, Malaysia, Singapura and Thailand. Until now, to observe the Malacca region was performed using Rancabungur/Rumpin ground station that have minimum coverage area. The Kototabang ground station is one of the strategic ground stations that cover the entire of Malacca regions which needs to be improved in maintenance and technical operation level. The potential value of Kototabang ground station will be elaborated technically in this paper.
Keywords: Kototabang ground station, LAPAN-TUBSAT
Indonesia has developed and operates the LAPAN-TUBSAT micro satellite since 2007 for supporting the surveillance application to observe the earth surface. LAPAN-TUBSAT satellite carried a video camera as an imaging sensor with 5 m ground resolution and 3.5 km swath. Data from this camera still have a weak geometric. This paper will reviews regarding LAPAN-TUBSAT data processing from video recordings as an effort to increase the geometric quality of the LAPAN-TUBSAT image. The correction model rectification of a simple single photograph is used for geometric correction. While the using of super resolution operator for increasing the video image resolution. The correction model rectification of a simple single photograph is used for geometric correction. While the super resolution operator attempted to efforts to increase the resolution of the video image. The experimental results shows geo-reference image with better geometric quality. The evaluation of LAPAN-TUBSAT performance should be carried out In the near future especially for providing Altitude information (Z). This is related to satellite manoeuvre ability to generate a stereo image with better B/H ratioKeywords:Videography system, LAPAN-TUBSAT Satellite, Geometric image improvement
<p>Indonesia has larges archipelagic in the world, 13,466 islands with land area of 1,922,570 km<sup>2</sup> and water area of 3,257,483 km<sup>2</sup>. Controlling and monitoring the huge area of Indonesia using satellite technology is a possible way to do and self reliance of space technology is the way to maintain satellite data security. Remote sensing data, telematics and communication were needed for many applications for people and industry. Development of satellite technology for developing country can be done since the utility of the Mechanical and Electronic Miniaturization System (MEMS) and Component of The Self (COTS) meet the microsatellite basic technology requirement. Indonesia has experience on microsatellite research for surveillance, remote sensing, ships monitoring and science through National Institute of aeronautics and Space (LAPAN). Sustainability of the microsatellite technology mastery need support from government regulation, commercial cooperation with private company and collaboration research with university for space technology innovation. By using the SWOT and Quantitative Strategic Planning Matrix (QSPM) method, this research identify and analyze the alternative strategy from external and internal factors and selects the appropriate and precise strategy for developing the microsatellite industry. The research shows that standardization of satellite system, product, metod, human resources and financial support with new investor using Public Private Partnership schemes as well as utilization of international cooperation with other country are the entrance for space industry.</p><p> </p><p>Keywords: Microsatellite, COTS, MEMS, QSPM</p>
This work introduces a novel noise removal algorithm for satellite imageries based on superpixel segmentation followed by statistics-based filtering. The algorithm worked in three main steps. First, the noisy input image was divided into subregions by employing simple linear iterative clustering (SLIC)-based superpixel segmentation. Then, the statistical property of each subregion was calculated, including their standard deviations and maximum values. Last, an adaptive statistics-based stripe noise removal was performed for each subregion by constructing adaptive filter sizes according to calculated properties. The algorithm was tested using real satellite imageries taken by the LAPAN-A2 and LAPAN-A3 satellites. Its performance was then compared to three existing methods in terms of image quality and computation speed. Extensive experiments on two datasets of 3-channel images captured by the LAPAN-A2 satellite showed that the algorithm was capable of reducing the stripe pattern as measured using the peak-signal-to-noise-ratio (PSNR) metric without introducing additional artifacts, which commonly appeared on over-corrected regions. Moreover, compared to existing methods, the proposed algorithm ran 42 to 103 times faster and provided better image quality by 2.46%, measured using the structural similarity metric (SSIM). The code of this work and the datasets used for the testing are publicly available on www.github.com/dancingpixel/SPSNR.
To support the utilization of LAPAN satellites in orbit, it’s needed a reliable receiver antenna system at the Ground Station. This antenna system performance is largely determined by the accuracy of its motor beside the RF Front system (LNA, Feed, Cable dan Receiver) used to track the satellite which is moving very fast in low orbit. The movement of satellites in low orbit is about 630 km around 7.5 km/sec. It requires a driving force motor with high accuracy antenna for satellite tracking in light of obtaining the antenna always in the of line of sight to satellite, so that not experiencing any signal losses.
(In order) To obtain a reliable antenna system with a better accuracy, the utilization of the Hybrid stepper motor 2 phase design become compulsory. This standard stepper motor has accuracy of 1.8/step and by adding a gear ratio of 100:1 so that the antenna accuracy will increases to 0.018/step. Detailed design and implementation of the stepper motor system accuracy will be elaborated in this paper.
Key words: Stepper motor hybrid, Low earth orbit, Satellite tracking antena
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