MTT06-01

Room:A01

Time:May 25 12:00-12:30

Mission Status of RISING-2
NAGAMINE URATA, Katia1∗ ; TAKAHASHI, Yukihiro1 ; KURIHARA, Junichi1
1Hokkaido University, Graduate School of Sciences

RISING-2 is a 50kg microsatellite successfully launched with the H-IIA rocket piggybacked on the ALOS-2 mission in May
2014. It is the result of a synergic joint collaboration between Hokkaido University and Tohoku University. Mission instruments
consist of a VLF receiver, bolometer camera, wide field camera, lightning and sprite imager and a high precision telescope(HPT). This last comprises a reflecting telescope of 5m ground sample distance followed by two optical channels - visible andnear infrared, respectively coupled with RGB filters and a liquid crystal tunable filter (LCTF).
The onboard LCTF is a compact (30mm cube) and light weight (80g) component developed by Hokkaido University, and as
the world’s first space LCTF, its spectral features are promising for the multi and hyperspectral data community, with configurable bands within 650-1050nm, 1nm/step, 10 to 30nm bandwidth.
We demonstrate the RISING-2 HPT-LCTF imagery pre-processing chain as well as its spatial and spectral capabilities, comparing its performance to existing systems. Quality metrics used for this analysis are Noise to Signal ratio, Modulation Transfer
Function and Normalized Difference Vegetation Index comparison.

Keywords: microsatellite, remote sensing, Earth Observation, hyperspectral, LCTF

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MTT06-02

Room:A01

Time:May 25 12:30-12:45

Liquid crystal tunable filter technology for multispectral remote-sensing by micro-satellites
KURIHARA, Junichi1∗ ; TAKAHASHI, Yukihiro11

Faculty of Science, Hokkaido University

New types of optical remote-sensing instruments for 50-kg class micro-satellites have been developed at Hokkaido University
and installed on micro-satellites developed under international collaboration. For example, the High Precision Telescope (HPT)on the RISING-2 micro-satellite achieved a spatial resolution on the ground of approximately 5 m and represented the world’s
highest level of performance for small satellites in the 50-kg class. The HPT employs advanced technology including a liquid
crystal tunable filter (LCTF) that was applied for the first time in the world to a space-borne multispectral sensor. The LCTF
is a kind of optical band pass filter with the center wavelength electrically controlled at 1 nm intervals in the visible and nearinfrared regions. Compared to conventional multispectral sensors, the advanced sensor using the LCTF has the great advantage
of enabling multispectral observations with hundreds of bands. The LCTF can also reduce size, weight, and power consumptionof multispectral sensors and the advanced sensors using the LCTF are suitable for small and dynamically unstable satellites. This
technology will change the utilization of micro-satellites that previously have not been applied to the multispectral and hyper
spectral Earth observation, such as ocean color observation, tree species classification, and mineral resource exploration.

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MTT06-03

Room:A01

Time:May 25 14:15-14:45

Vietnam Micro satellite development program
VU VIET, Phuong1 ; NGUYEN THI, Thao1∗
1Vietnam National Satellite Center

Since 2006, after [The Strategy for Research and Application of Space Technology towards 2020] was approved by the Prime
Minister of Vietnam, space technology especially the development of earth observation satellite in Vietnam has seen a massivechange in all aspects. To achieve the most challenging goal - building up capacity in terms of critical infrastructure and humanresource to produce satellite domestically by 2020, Vietnam National Satellite Center (VNSC), a national research agency operating under Vietnam Academy of Science and Technology (VAST), was established in 2011 following the Decision of the PrimeMinister. VNSC’s mission is to develop satellite technology and applications. VNSC is responsible for managing and implementing the Vietnam Space Center project, the objective of which is to build capacity to self-produce satellites for the benefits ofdisaster and climate change countermeasure.
To train the young researchers of VNSC to meet the development requirement, 36 researchers of VNSC planned to five
Japanese universities (The University of Tokyo, Keio University, Tohoku University, Kyushu Institute of Technology, andHokkaido University) with 22 researchers are already studied in Japan. They are taking master courses about satellite technology in order to work for Vietnam Space Center when it is completed. During the time in Japan, they also participate in an
educational satellite project.
The result of this project will be the first Vietnamese micro satellite called MicroDragon. It is developed by VNSC researchers
under instruction of the Japanese professors. The main missions of MicroDragon is assessing coastal water quality of Vietnam
to develop aquaculture and locating living resources that are associated with specific thermal features in the oceans by observing
ocean colour. MicroDragon weights 50Kg with 50cm cubic size, it is now in design progress which intended to equip with 3
cameras: Space-borne Multispectral Imager (SMI), Triple Polarization Imager (TPI) and Infra-Red Imager (IRI). The development of MDG itself is planned to be finished by the end of 2017.

Keywords: Microsatellite

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Room:A01

Time:May 25 14:45-15:00

Development of the Satellite Bus System for PHL-MICROSATSAKAMOTO, Yuji1∗ ; GONZALEZ, Ariston1 ; ESPITITU, Juan paolo E.1 ; LABRADOR, John leur delos santos1 ;OLIVEROS, Julian marvick fua1 ; KUWAHARA, Toshinori1 ; YOSHIDA, Kazuya11Tohoku University

The microsatellite PHL-MICROSAT development started in December 2014. It is a development initiative by the Philippines’
Department of Science and Technology (DOST) in partnership with Tohoku University and Hokkaido University. The mission
spans across various remote sensing applications such calamity assessment, ocean study, agricultural productivity, and urbanplanning. In this presentation, a summary of the mission and the system design is reported.
The PHL-MICROSAT is a 50-kg microsatellite planned to be deployed from the International Space Station (ISS) using theJapanese Experiment Module (JEM) ISS-50 Orbital Deployer (ISS-50). This deployer requires the satellite to have a maximum
envelope of 550x550x350mm. The orbit will have an inclination of 51.6deg at an altitude similar to the ISS at launch, approximately 415km. The launch rocket has not been decided yet, but the launch date has been planned for 1st quarter of 2016.
The primary mission of PHL-MICROSAT is for earth observation using a 3-meter resolution NIR High Precision Telescope(HPT), 80-meter Space-borne Multispectral Imager (SMI) with two liquid crystal tunable filters (LCTF), and a 7-km resolution
Wide Field camera. The PHL-MICROSAT payload has been modified to fit the mission objectives of DOST. A middle-fieldwide-view CCD camera has been introduced to assist in attitude control and target pointing.
The system design of the PHL-MICROSAT builds upon the existing framework of RISESAT. The major changes came upon
the designated specifications of the ISS-50 deployment. The central pillar configuration has been modified into a single central
panel structure. The exterior edges of the microsatellite have straight solid rails to act as the slider guide on the ISS-50 deployer.
The PHL-MICROSAT will conduct observation on designated positions by utilizing the three-axis attitude control system consisting of 4-reaction wheels, gyro sensors, sun aspect sensors, and star sensors. One star tracker telescope is angled at 30deg awayfrom earth, to minimize albedo effects during its operation. Coarse attitude control can be conducted using magnetic torquersand magnetometers.
An engineering instrument dedicated for student education is also allotted in PHL-MICROSAT. A small-scale satellite system
is being planned to be included as additional payload. This small-scale system will carry out simple attitude determination using
magnetometers, sun image sensor, and gyro sensors which are very tiny modules different from main bus units. Also, colored
image photography using mobile CMOS cameras can be obtained. The modules to be chosen are lightweight, compact, andlow power. This small-scale system has potential influence on future cubesats or small satellites, especially those who will takeinterest in resource limited, optic-based observation missions.
PHL-MICROSAT is equipped to have 19 strings of Photovoltaic (PV) cells, capable of generating an average power of 39W
over the average sunshine time of 54.6 min/rev. on the 400km ISS orbit. This equates to an average charging capacity of 41,900mAh/day, more than the projected operational discharge capacity average of 24,800 mAh/day of the satellite.
The PHL-MICROSAT is intended to be controlled primarily from the Tohoku University Ground station (CRESST), with acommand line on the UHF band. A ground station is being prepared in the Philippines as well. Due to spectrum allocation
arrangements in the Philippines, PHL-MICROSAT will have command line access on the S-Band. PHL-MICROSAT Housekeeping (HK) routine data will be sent through the S-band link, while Mission data will be utilizing both the S-band and X-banddownlink channels. The PHL-MICROSAT will be equipped with a 1.2kbps UHF uplink antenna, 1kbps S-band Uplink antenna,
100kbps S-band downlink antenna, and a 2.4Mbps X-band downlink antenna.

Keywords: PHL-MICROSAT, microsatellite, International Space Station, High Precision Telescope, Liquid Crystal Tunable
Filter

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MTT06-05

Room:A01

Time:May 25 15:00-15:30

The Development of the Philippines First Microsatellite for Earth Observation: PHL MICROSAT 1
PULUTAN, Doreena karmina1∗ ; MARCIANO, Joel joseph1 ; BAYONA, Michael gringo angelo1
1University of the Philippines

By 2016, the Philippines will launch its first Earth-observing microsatellite, PHL-MICROSAT-1. This is under the program,”Development of Philippine Scientific Earth Observation Microsatellite (PHL-MICROSAT)”, funded by the Philippines’ Department of Science and Technology (DOST). It is a collaboration among scientists, engineers and professors from the University ofthe Philippines, the Advanced Science and Technology Institute (ASTI) of the DOST, and from Japan, the Hokkaido Universityand Tohoku University. The aim is to build, launch and effectively utilize the Philippines’ first microsatellite for multi-spectral,high precision earth observation, focusing on applications in land and aquatic resource monitoring and assessment, and disasterrisk management. It addresses the need to develop capacity through intensive study leading to the development of the microsatellite.
The components of the PHL-MICROSAT program include (1) the microsatellite bus development in Japan and the Philippines;(2) the establishment of the ground receiving station in the Philippines; (3) the creation of a data access, archiving and distribution mechanism and facility; (4) calibration and validation of remote sensing instruments and (5) development of remote sensing
products from the microsatellite images.

1/1MTT06-06

Room:A01

Time:May 25 15:30-15:45

Roles of Asian Micro-satellite Consortium
TAKAHASHI, Yukihiro1∗
1

Hokkaido University

Micro-satellite with a weight of 50-100 kg has various merits compared to middle and large sized satellite, that is, 1) low cost
fabrication compared to middle or large sized satellite, namely, few M EUR including BUS and mission payloads. The launchcost will be about 2 M EUR as piggyback, 2) quick fabrication: about one or two years for flight model would be sufficient,enabling application of the latest technologies, 3) on-demand operation, taking detail information at a point of interest, and 4) thelow cost and quick fabrication make us possible to launch not a small number of satellites, which is called as constellation flight.
We would discuss the possible roles of international organization, Asian micro-satellite consortium (AMC), which promotes
and accelerates the micro-satellite development and the discussion of data utilization. AMC will consist of domestic working
group in each country. The each working group is composed of 3 parts: BUS development team, payload development teamand data user team, involving various field scientists or engineers, such as forestry, agriculture, fishery, forest fire, bio-diversity,flood, meteorology, climate change, ionospheric / magnetospheric science, etc. Also in AMC we will discuss the possibility offuture projects, such as on-demand operation or super constellation involving more than tens of microsatellites and unmanned airvehicles (UAVs) under international collaboration.
AMC will be started officially in the very near future probably involving about 10 countries in SE-Asia as the founding
member.

Keywords: Asia, micro-satellite, consortium

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