Status of Nanosatellite Development for Mothership Daughtership Space Experiment by Japanese Universities

We have begun the feasibility study to build a small satellite in the 3kg mass range and in the power range less than 30W since October in 1998, sponsored by National Space Development Agency of Japan (NASDA). This satellite installs three reaction wheels for an attitude control and camera which will demonstrate optical navigation experiment by using image processing. The BBM design status is described in this paper. The components such as a small reaction wheel, electric flash and onboard computer were built. Mothership - daughtership technology and formation flying experiments are planned. New electric propulsion is being developed for small satellite

Weightless Construction of High Tower to the Stratosphere

Construction of a high tower to the stratosphere was first proposed by Canadian Thoth Company. Because of its enormous scale, people are hesitant to implement the project immediately. This paper proposes several next steps to its realization. Fundamental aspects of the structure are presented. Based on the models, treated are a long bridge over Tsugaru Straight, medium height towers for an inter-city rope way or a suspended rocket launcher in addition to the stratospheric tower. For a light weight structure, some inflatable models are tested to verify its effectiveness to the aerospace field of application

Advanced System of Micro Satellite for Hyperspectral Remote Sensing Mission

The Space-Science Industries Program has been performing investigations for the Micro-satellite and Hyperspectral remote sensing missions.The Earth Observation Micro-satellite “TAIKI” is a 50kg satellite which has low-cost and small bus-subsystems for advanced remote sensing missions.This bus-subsystem will be developed and manufactured products.The TAIKI is characterized by a small Hyperspectral sensor “HSC-III” which is targeted at the performances of 30m of ground sampling distance and 61 spectral bands in VINR (Visible and Near Infrared).The advanced remote sensing data such as Hyperspectral data are large volume so the downlink uses the laser communication of 100Mbps.The terrestrial laser communication has already been successfully experimented.In addition, HSC-III optics instrument which mainly consists of spectrometer, detector and on-board calibration systems has been developed in 2008.This paper reports the small bus-subsystem including the laser communication systems for the TAIKI and Hyperspectral sensor instrument

Potential Inaccuracies in Chloride Measurements in Patients with Severe Metabolic Acidosis

Background. To address the cause(s) of the significant differences in chloride (Cl-) concentrations between point-of-care blood gas analyzers and central laboratory analyzers. Methods. Cl- concentrations measured simultaneously by a blood gas analyzer (ABL800 FLEX) and a central laboratory analyzer (Hitachi7600) were collected in patients with severe acidemia (pH<7.20) (n=32) and were examined for correlations between differences in Cl- and factors associated with the acid-base status. Cl- concentrations were measured with both analyzers for samples with different concentrations of lactate, inorganic phosphate, or bicarbonate (HCO3   −). Results. The differences in Cl- concentrations were correlated with HCO3   − concentrations (r=0.72, P<0.0001) and anion gap (r=0.69, P<0.0001). Only the addition of HCO3   − proportionately increased Cl- levels measured by a Hitachi7600, but it did not affect those measured by an ABL800FLEX. Conclusion. Cl- measurements with some analyzers may be influenced by HCO3   − concentrations, which could result in the observed discrepancies