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Ueyama K.,Japan Manned Space Systems Corporation
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010

The life science experiments operations conducted in Japan Experiment Module (JEM) 'KIBO' so far are outlined briefly. 'KIBO', which means 'hope' in Japanese, is the largest science module in the ISS, and has been providing great opportunities to perform long duration life science experiments in space. In 2009, cell incubation, plant cultivation, and animalcule growth experiment were held in SAIBO rack which contains Cell Biology Experiment Facility (CBEF) and Clean Bench (CB). Operations life cycle of the life science experiments in KIBO will be presented. Life science experiments in KIBO are leaded by the payload's fight controller teams; JEM-Payload, JPOC and 'BIO' from Tsukuba Space Center (TKSC). Issues of the life science experiments operations and some solution examples are described. It is desired that the solution methods could help to propose new ideas for some malfunctions. Clearly-stated operations rules, enough training, carefully written and checked procedures and scheduling must be needed for mission success. BIO often required expeditious and accurate judgments in real-time operations because living samples have a critical time limit if they were exposed to inappropriate environments. Some unique solution methods using common stuffs are advanced by BIO for problems. Life science experiments in the ISS will generate great contribution to the progress of manned space programs. All operational knowledge should be shared among international parties. Copyright ©2010 by the International Astronautical Federation. All rights reserved.


Satoh Y.,Japan Manned Space Systems Corporation
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010

Japanese first manned space module "Kibo" have been launched by Space Shuttle and assembled as a part of International Space Station. As the preparation for its launch, JAXA had experienced unique activities for manned space program. Through those activities, JAXA had experienced lots of lessons learned. This presents a part of such information which will be efficient for the future manned space program.


Wakamori K.,Japan Manned Space Systems Corporation | Ichikawa D.,Japan Manned Space Systems Corporation | Niimi R.,Japan Manned Space Systems Corporation | Suzuki M.,Tokyo University of Agriculture
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2013

An operational processing and analysis system for rice growth monitoring has been developed at Japan Manned Space Systems Corporation and Tokyo University of Agriculture. The system processes DMC images having capability to multi-temporal observation during the growing season and generates image maps for rice growing status through satellite-derived NDVI-SPAD value. The monitoring was conducted in paddy fields of northern part of Japan. Mapping algorithm was established by correlation NDVI derived from DMC images and ground collected SPAD value. The correlation coefficient between the SPAD value of rice leaf and NDVI showed good agreement and R2 was 0.79. © 2013 IEEE.


Klas M.,Fraunhofer Institute for Experimental Software Engineering | Nakao H.,Japan Manned Space Systems Corporation | Elberzhager F.,Fraunhofer Institute for Experimental Software Engineering | Munch J.,Fraunhofer Institute for Experimental Software Engineering
Empirical Software Engineering | Year: 2010

Planning quality assurance (QA) activities in a systematic way and controlling their execution are challenging tasks for companies that develop software or softwareintensive systems. Both require estimation capabilities regarding the effectiveness of the applied QA techniques and the defect content of the checked artifacts. Existing approaches for these purposes need extensive measurement data from historical projects. Due to the fact that many companies do not collect enough data for applying these approaches (especially for the early project lifecycle), they typically base their QA planning and controlling solely on expert opinion. This article presents a hybrid method combining commonly available measurement data and context-specific expert knowledge. To evaluate the method's applicability and usefulness, we conducted a case study in the context of independent verification and validation activities for critical software in the space domain. A hybrid defect content and effectiveness model was developed for the software requirements analysis phase and evaluated with available legacy data. One major result is that the hybrid model provides improved estimation accuracy when compared to applicable models based solely on data. The mean magnitude of relative error (MMRE) determined by crossvalidation is 29.6% compared to 76.5% obtained by the most accurate data-based model. © Springer Science + Business Media, LLC 2009.


Ichikawa D.,Japan Manned Space Systems Corporation | Wakamori K.,Japan Manned Space Systems Corporation | Suzuki M.,Tokyo University of Agriculture
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2014

Agriculture fields located in northern part of Japan having vector polygons as paddy, non-paddy and uncultivated attributes were investigated to identify paddy fields using RapidEye satellite images acquired on June 27 and July 28 of 2012. Paddy, other crop and uncultivated fields were selected from the vector polygons and the polygons were extracted from the images. A bimodal histograms of the extracted polygons were created and established identification algorithm for paddy field classification. The algorithm was applied to RapidEye image and created a map for active paddy fields of the area for 2012. © 2014 IEEE.


Wakamori K.,Japan Manned Space Systems Corporation | Ichikawa D.,Japan Manned Space Systems Corporation | Suzuki M.,Tokyo University of Agriculture
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2014

An operational processing and analysis system for rice growth monitoring has been developed at Japan Manned Space Systems Corporation and Tokyo University of Agriculture. The system processes DMC images having capability to multi-temporal observation during the growing season and generates image maps for rice growing status through satellite-derived NDVI-SPAD value. The monitoring was conducted in paddy fields of northern part of Japan. Mapping algorithm was established by correlation NDVI derived from DMC images and ground collected SPAD value. The relation of NDVI and SPAD value can be grouped greatly between varieties in the growing process of rice. © 2014 IEEE.


Yokoyama E.,Gakushuin University | Yoshizaki I.,Japan Aerospace Exploration Agency | Shimaoka T.,Chiyoda Corporation | Sone T.,Japan Manned Space Systems Corporation | And 2 more authors.
Journal of Physical Chemistry B | Year: 2011

The growth of single ice crystals from supercooled heavy water was studied under microgravity conditions in the Japanese Experiment Module ''KIBO'' of the International Space Station (ISS). The velocities of dendrite tips parallel to the a axis and the growth rates of basal faces parallel to the c axis were both analyzed under supercooling ranging from 0.03 to 2.0 K. The velocities of dendrite tips agree with the theory for larger amounts of supercooling when the growth on the basal faces are not zero. At very low supercooling there is no growth on the basal faces. With increasing supercooling the basal faces start to grow, the growth rate changing as a function of supercooling with a power law with an exponent of about 2, with the exponent approaching 1 as supercooling increases further. We interpret the growth on the basal faces as being controlled by two-dimensional nucleation under low supercooling, with a change in the growth kinetics to spiral growth with the aid of screw dislocations with increasing supercooling then to a linear growth law. We discuss the combined effect of tip velocity and basal face kinetics on pattern formation during the growth of ice. © 2011 American Chemical Society.


Ichikawa D.,Japan Manned Space Systems Corporation | Wakamori K.,Japan Manned Space Systems Corporation
International Geoscience and Remote Sensing Symposium (IGARSS) | Year: 2015

S-NPP VIIRS EDR data have been processed and 10-days composite NDVI images are generated. In the image processing procedure maximum value composite method has been applied for the each pixel of the images. The composite images are produced for every 10-days from S-NPP EDR data. The resulting NDVI composite images cover Asian and Australian land area. The image products of S-NPP 375 m resolution composite for continental scale can be used for long-term continental changes, regional environmental monitoring and agriculture information. © 2015 IEEE.


Hamamoto N.,Japan Manned Space Systems Corporation
Journal of the National Institute of Information and Communications Technology | Year: 2015

In a handheld satellite phone system using a large onboard reflector and a phased array feed system, multi beams with low side-lobe level are important for frequency reuse. In the beam pattern design, a search method combining constraint points is usually used for obtaining an optimized set of excitation distributions of the feed system. This paper studies a simple method of deriving the excitation distributions for low side-lobe beams and evaluates the effectiveness and the limits of the method by computer simulation.


Fujino Y.,Toyo University | Hamamoto N.,Japan Manned Space Systems Corporation
Journal of the National Institute of Information and Communications Technology | Year: 2015

In this paper, we describe design of onboard antenna system for STICS.

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