KSAT(Hayato) Project


This page describes on the outcome of Hayato (KSAT) project.

Missions of KSAT

 1. Research That Aims to Predict the Torrential Rain and Rornadoes
   On-orbit demonstration of original observation method of atmospheric water vapor using satellite.
 2. Take Earth Live Images from Space
   Single shot in a few seconds using the Ku-band high-speed communication function.

Status of KSAT

  The satellite separated from the rocket was launched from the Tanegashima Space Center at 300km altitude on May 20, 2010. Then, the satellite continued to orbit about 90 minutes the earth, reduce altitude gradually under the influence of atmospheric slight remaining in the 300 km altitude, entering the atmosphere on July 14 the same year, ceased to exist. Orbital lifetime was about 50 days.
  We lost sight of the initial satellite launch. However, We was able to receive radio waves from a satellite control station, and see that the satellite is operating in space on June 1. But, We will not be able to supplement the satellite again from June 8 , We was not able to capture the satellite re-entry. Since the high frequency is used for communication than the conventional ultra-small satellite of Ku-band, this satellite had characteristics (field) that can supplement the satellite very narrow range. I believe that as a major cause of lost sight of the satellite, the orbit of the satellite changes due to the influence of the atmosphere was not good enough.
Currently, We are promoting analysis was about how the deviation of the actual trajectory and the expected trajectory using the results of satellite tracking. This analysis is considered to give new information about the orbit of a satellite tracking was turned on ultra-low altitude.

Appearance of KSAT  (Expand by Click)

  (left)KSAT on the Palm, (center)During Launch, (right)During Boom Extension
  手のひらとKSAT        KSATの外観(ブーム進展時)
  The form of satellite is a cube one side 10 cm and Mass is 1.43 kg.

Structure of KSAT (Expand by Click)

  (left)Internal equipment layout, (center)EM parts, (right)FM parts
  上部パネル取り外し時    KSAT EMの部品    KSAT FMの部品
  Solar cell has been placed on four sides.
  AAA nickel hydride battery is used for the secondary battery.(Product name eneloop)

Block Diagram of the System  (Expand by Click)


  ブロック構成図

Figure in Space  (Expand by Click)

  (left)27 seconds after the ignition, (center)Separation from the rocket, (right)Received signal
      ロケットからの分離    KSATからの電波(13GHz)

Communication

  Single Uplink line, Single Downlink line.

- Frequency and Transmissio Rate -

Frequency Band Moduration Method Transmission Rate Purpose
Uplink S Band G2D 1 kbps  Command
Downlink Ku Band G1D 100 kbps and
1 Mbps
 HK data and
 Image data


Development and Operation


  Duration of Development

- Development system (2009) -
Charge
Belongs Name Remarks
 Head of project Kagoshima University Sadao Kiyohara  Head of the Faculty of Science
 Project manager Kagoshima University Masanori Nishio  Department of Physics and Space
 Charge System Safety Kyushu University Toshiya Hanada  Department of Aerospace
 Aircraft and Structures Systems Ltd. Elm Akimasa Miyahara  Design
NS Space Tetsuro Sato  Design
Ltd. Togo Nario Higashi  Cutting work
Ltd. Fujita Works Ryou Fujii  Sheet metal
Kyushu University Shunsuke Onishi  D2(2009)
 Thermal control system Kagoshima University Hiroshi Katanoda  Department of Mechanical Engineering
Kagoshima University Teruhiro Hamada  M2(2009)
Kagoshima University Shinichi Nagaya  M1(2009)
Kagoshima University Katashi Suda  B4(2009)
 Communication system (purchase) Ltd. Microlab Tsutomu Tokifuji  Transmitter
Ltd. Addnics Kaname Kojima  Receiver
 Power supply system Ltd. A.R.P. Chikara Minatake  Fabrication and Characterization
Kagoshima University Haruka Ohta  B4(2009)
Kagoshima University Yuki Tsutsumi  B4(2009)
Kagoshima University Nanami Sakamoto  M2(2009)
 Attitude Kagoshima University Ryouta Hayashi  Department of Mechanical Engineering
Kagoshima University Kazuki Hamada  M1(2009)
Tohoku University Yuji Sakamoto  Department Aerospace
 Central processing system Kagoshima University Nanami Sakamoto  M2(2009)
 Mission equipment Kagoshima University Shigeru Nakao  Department Earth and Environmental Sciences
Kagoshima University Masanori Nishio  Department Physics and Space
Kagoshima University Shinichi Teshima  M1(2009)
Kagoshima University Fumihiko Hori  B4(2009)
Kagoshima University Kengo Nishi  B4(2009)
 Development of ground-based Kagoshima University Masanori Nishio  Department Physics and Space
Kagoshima University Yuji Harada  M1(2009)
Tohoku University Yuji Sakamoto  Department Aerospace
 Satellite test Kagoshima University Masanori Nishio  Department Physics and Space
Kagoshima University Nanami Sakamoto  M2(2009)
Kagoshima University Yuji Harada  M1(2009)
Kagoshima University Shinichi Teshima  M1(2009)
Kagoshima University KentoMorimatsu  B3(2009)
Kagoshima University Yuki Tsutsumi  B4(2009)
Kagoshima University Fumihiko Hori  B4(2009)

- Satellite operation system (2010) -
Belongs Name Remarks
Tohoku University Yuji Harada  Department Aerospace
Kagoshima University Masanori Nishio  Department Physics and Space
Kagoshima University Yuji Harada  Department Physics and Space M2(2010)
Kagoshima University Shinichi Teshima  Department Physics and Space M2(2010)
Kagoshima University Fumihiko Hori  Department Physics and Space M1(2010)
Kagoshima University Takeo Mutoh  Department Physics and Space M1(2010)
Kagoshima University Kento Morimatsu  Department Physical Sciences B4(2010)
Kagoshima University Yuya Tateyama  Department Physical Sciences B4(2010)
Kagoshima University Hikaru Ohyashiki  Department Physical Sciences B4(2010)
Kagoshima University Keisuke Tsukahara  Department Physical Sciences B3(2010)
Kagoshima University Ryuya Mizuma  Department Physical Sciences B3(2010)
Kagoshima University Naoki Mimura  Department Physical Sciences B3(2010)
Kagoshima University Shinichi Nagaya  Department Mechanical Engineering M2(2010)
Kagoshima University Takashi Suda  Department Mechanical Engineering M1(2010)
Kagoshima University Ryunosule Nakamura  School of Mechanical Engineering B4(2010)


  開発者+研究室メンバー2010年   衛星引き渡し直前   研究室メンバー2010年
  (left)Just before the assembly of the FM, (center)Farewell party the day before satellite delivery
  (right)Part of the member satellite operation in 2010

The Main Report on The Results of KSAT Launch

 [1] A satellite control system and results of tracking operations for avery-low-earth-orbit satellite HAYATO
   Y. Harada, M. Nishio and Y. Sakamoto,
   Proc. of JC-SAT 2010 (2010 Joint Conference on Satellite Communications), pp.138-141 (2010.10).

 [2] Development of a pico-satellite with a compact Ku-bund transmitter
   S. Teshima, M. Nishio, T. Tokifuji
   Proc. of JC-SAT 2010 (2010 Joint Conference on Satellite Communications), pp.142-147 (2010.10).

 [3] Development and evaluation of a miniature satellite instruments
   S. Teshima, Kagoshima University Graduate School of Science and Technology Master Thesis of 2010 (2011.2).
 [4] Study on nano-satellites in low-altitude
   Y. Harada, Kagoshima University Graduate School of Science and Technology Master Thesis of 2010(2011.2).
 [5] In-orbit Verification of a Pico-satellite for Atmospheric Water Vapor Observations
   M. Nishio, Y. Sakamoto, R. Hayashi, H. Katanoda, Y. Harada, S. Teshima, K. Hamada, S. Nagaie, F. Hori, T. Mutou
   2nd Nano-Satellite Symposium, CD-ROM (2011.3).

 [6] In-orbit Verification of a Compact Ku-band Transmitter for a Pico-satellite
   M. Nishio, Y. Harada, S. Teshima, T. Mutou, F. Hori, T. Tokifuji, H. Ujihara, and Y. Sakamoto
   Proc. of CJMW2011, pp.459-496 (2011.4).

 [7] Development of Next Nano-satellite at Kagoshima
   F. Hori, T. Muto, T. Morimatsu and M. Nishio
   Proc. of the 33rd Symposium on Remote Sensing for Environmental Science, pp.24-26 (2011.8).

 [8] Atmospheric density at orbits of less than 300km estimated from a nano-satellite HAYATO
   T. Kimura, Y. Gozawa, Harunobu Y. and M. Nishio
   Proc. of the 33rd Symposium on Remote Sensing for Environmental Science, pp.33-43 (2011.8).



Masanori Nishio    Sep. 6, 2011 Revised