SPRITE-SAT: a Micro Satellite for Scientific Observation of Transient Luminous Events and Terrestrial Gamma-Ray Flashes

Yoshida, Kazuya; Takahashi, Yukihiro; Sakamoto, Yuji; Eriko, Ujiie; Takiuchi, Kei; Nakazato, Y.; Sawakami, Tomoki; Sakanoi, Takeshi; Kasaba, Yasumasa; Kondo, Satoshi; Yamashita, Kozo; Ueda, Shinsaku; Takashima, Takeshi; Nakazawa, K.; Mitani, Takefumi; Enoto, Teruaki; Sato, Mitsuteru; Inan, U. S.; Linscott, I. R.; Bruhn, Fredrik; Masumoto, Yoshinari

doi:10.2322/tastj.8.tm_7

Cited by 9 publications

(7 citation statements)

References 3 publications

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“…In the case of a different altitude and the same local time of descending node, the configuration factors corresponding to the altitude are different as shown in Eqs. (4) and (5). The configuration factor becomes smaller with higher altitude.…”

Section: Resultsmentioning

confidence: 99%

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One Nodal Thermal Analysis for Nano and Micro Satellites on Sun-Synchronous and Circular Orbits

Totani

Ogawa

Inoue

et al. 2013

AEROSPACE TECHNOLOGY JAPAN

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One nodal thermal analysis of nano and micro cubic satellites pointing to the Earth on sun-synchronous and circular orbits is carried out. The altitudes of the orbits are from 300 to 1,000 km. The local time of descending node is from 6 to 12. The combinations of the solar absorptivity and the infrared emissivity on the surface of the satellite in which the satellite satisfies the allowable temperature range, from 0 to 40 deg. C., are clarified for each of the above orbits. As the parameter of heat capacity of the satellite over one surface area of the satellite increases, the choice of combinations of the solar absorptivity and the infrared emissivity increases. The number of combinations in the case of the orbits without the shadow region is much larger than that with the shadow region. The number of combinations in the orbits without the shadow region increases with higher altitude and larger projected area with respect to the sun. The number of combinations in the orbits with the shadow region increases with higher altitude, larger projected area and smaller angle of the shadow region.

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Section: Resultsmentioning

confidence: 99%

“…These values of the size and the mass are set by reference to the previously realized satellites. [1][2][3][4] There is little data of the specific heat of satellites. The specific heat of three satellites in Table 1 is set to 688 J/(kg K) in such a way that the temperature of satellites changes more easily than the realized satellites.…”

Section: Introductionmentioning

confidence: 99%

One Nodal Thermal Analysis for Nano and Micro Satellites on Sun-Synchronous and Circular Orbits

Totani

Ogawa

Inoue

et al. 2013

AEROSPACE TECHNOLOGY JAPAN

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“…As mentioned above, the Tajik In the near future, however, observation of a certain area with much more frequent repetition may be practicable by launching many sets of microsatellites such as the 50-kg class microsatellite SPRITE-SAT (RISING) Yoshida et al, 2010).…”

Section: Recommended Action To Mitigate Glacier-related Hazardsmentioning

confidence: 99%

Glacier-Related Hazards and Their Assessment in the Tajik Pamir: A Short Review.

Komatsu

Watanabe

2014

チリガクロンシュウ

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This paper reviews contemporary glacial features, characteristics of documented glacial hazards, and the status of hazard assessment studies in the Pamirs of Tajikistan (hereafter the Tajik Pamir). The review found detachment of a hanging glacier, glacier-surging, and outburst discharge of a glacial lake to be major potential causes of glacial hazards in the Tajik Pamir, especially in the western area (west from approx. 73° E). Guerrilla glacial lakes, which are characterised as glacial lakes on the ice-core moraine that "appear repeatedly," "enlarge rapidly (within less than one year)," "disappear within less than two years," "are superficially closed," and "are of relatively small size (approx. < 10 6 m 2 )" should hereafter be paid special attentions. Preparation of appropriate hazard-mitigation activities should require early detection of not only the large crack in the hanging-glacier terminus, surge behaviour, and the glacial lake and guerrilla glacial lake, but also regular monitoring of these hazard factors. One of the most suitable monitoring techniques is to use earth observation satellite images with a relatively short repetitive cycle (ideally once every few days) and a high spatial resolution (ideally several meters).These criteria may be satisfied in the near future by using images captured by many sets of microsatellites, such as the 50-kg class microsatellite SPRITE-SAT (RISING).

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“…Transient luminous events (TLEs) are a result of electrical discharge phenomena that occur in the upper atmosphere. Since the first TLE recording, accidently captured in the year 1989 [1], researchers have made various efforts to observe TLEs on a variety of platforms such as ground-based facilities [2][3][4], aircrafts [4][5][6], space shuttles [7,8], satellites [9][10][11], and the International Space Station [12,13]. From these studies, TLEs are categorized into five groups such as sprite, blue jet, halo, elf, and gigantic jet.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of an Onboard Transient Luminous Events Observation System for VisionCube via Ground Simulation Environment

2018

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The VisionCube is a 2-unit CubeSat developed in house, of which the primary mission is detecting the occurrence of transient luminous events (TLEs) in the upper atmosphere and obtaining corresponding images from a low Earth orbit. An onboard TLE observation system of the VisionCube CubeSat is designed and developed by incorporating a photon-sensitive multi-anode photon-multiplier tube (MaPMT) and an image sensor. Also, a distinctive TLE observation software which enables detection of the TLEs and capture of images in a timely manner is devised. By taking into account the limited resources of a small CubeSat in size and power, the onboard observation system is developed employing a system-on-chip device by which both hardware and software can be integrated seamlessly. The purpose of this study is to investigate the functionality of the hardware and the validity of the software algorithm to show that the onboard system will function properly with no human intervention during the operations in space. To this end, a ground simulation facility is constructed to emulate TLEs occurring in space using a set of ultraviolet light-emitting diodes (UV LEDs) inside a darkbox. Based on the analysis of the spectral and temporal properties of the TLEs, the randomly generated UV LED pulses are chosen for verification scenarios for the TLE observation system. The validation results show that the hardware and the software algorithm of the onboard observation systems can effectively detect the TLEs and obtain the images during the in-orbit operation.

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SPRITE-SAT: a Micro Satellite for Scientific Observation of Transient Luminous Events and Terrestrial Gamma-Ray Flashes

Cited by 9 publications

References 3 publications

One Nodal Thermal Analysis for Nano and Micro Satellites on Sun-Synchronous and Circular Orbits

One Nodal Thermal Analysis for Nano and Micro Satellites on Sun-Synchronous and Circular Orbits

Glacier-Related Hazards and Their Assessment in the Tajik Pamir: A Short Review.

Experimental Validation of an Onboard Transient Luminous Events Observation System for VisionCube via Ground Simulation Environment

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