Cute-1.7 + APD Project
Cute-1.7 + APD project is a satellite development project mainly by students at Laboratory for Space Systems, Tokyo Institute of Technology.
To launch our satellite in 2006, the project has started in January, 2004. Our satellite, named Cute-1.7 + APD, will be 200mm x 100mm x 100mm in size.
Cute-1.7 + APD will be the second satellite made in Tokyo Institute of Technology after the first one, CUTE-I, was launched in June, 2003.
This project is based on the international CubeSat project.
Cute-1.7 + APD will be launched as a sub-payload on the 3rd stage of Japanese solid rocket M-V-8 on Feb. 18, 2006. Main satellite is ASTRO-F.
The planned orbit of "Cute-1.7 + APD " is 250-280km in perigee height and 750km in apogee height, so lifetime of "Cute-1.7 + APD " is estimated much less than one year for the shortest due to atmospheric reentry. The exact lifetime is dependent on the actual rocket flight condition and atmospheric density.
"Cute-1.7 + APD II" is a follow-on satellite to the "Cute-1.7 + APD," and much improvements will be conducted in many components of "Cute-1.7 + APD II", in particular, for amateur communications system, camera system, APD sensor and so on, based on the experiences acquired in the development and operation of "Cute-1.7 + APD."
The launch of "Cute-1.7 + APD II" is planned to 2006Q3.
The web site will be updated as progress is made on the development of this project.
The Goals of This Project
Project Overview PowerPoint(Created at 2004-01-25, subject to change)
Mission Scenario PowerPoint(in Japanese)
Details of Simple Radio Link Layer
Amateur Frequency Use
Cute-1.7 + APD project team proposes using an amateur radio frequency for communication between the satellite and its ground station. We will operate our satellite, recognizing that radio-frequency spectrum is a precious finite resource and that an amateur satellite should be operated for the purposes stated in IARU's guidlines, that is
About Cute-1.7 + APD's digipeater with store-and-forward functionality.
- To provide communication resources for the general amateur radio community and/or
- To conduct technical investigations in all respects consistent with the Radio Regulations.
Frequency coordination for Cute-1.7 + APD project was completed by IARU at December 5, 2004. Cute-1.7 + APD will use:
How to Receive
- 437.385MHz, CW Beacon
- 437.505MHz, GMSK or FM/AFSK AX25 Downlink
- 1268.500MHz, GMSK AX25 Uplink
*2 USSS: University Space Systems Symposium, Symposium by space engineering majors from Japan and US.
- Nov, 1999 Concept of CubeSat was presented by Prof. Twiggs, Stanford Univ. at University Space Systems Symposium*2
The concept is to gain frequent launch opportunities by making satellites in standardized size and mass.
- Fall, 2000 CUTE-I project started
- 2003-06-30 CUTE-I launched. (Still working in space as of Oct, 2004)
- 2004-01-14 Cute-1.7 + APD project started.
- 2004-02-21 Discussed the use of amateur frequency by Cute-1.7 + APD at JAMSAT's Tokyo Area Meeting.
- 2004-04-18 Presented a poster at JAMSAT Annual Symposium.
- 2004-04-21 Conceptual design review held.
- 2004-07-04 Radiation test at Research Center for Nuclear Physics in Osaka University
- 2004-08-12 Presented a paper at 18th AIAA/USU Conference on Small Satellites. (See Papers and Presentations section below)
- 2004-08-22, 22 Presented posters at Ham Fair 2004.
- 2004-09-25, 26 Presented a poster at Space Development Forum 2004.
- 2004-10-06 to 2004-10-10 Presented posters at Japan International Aerospace Exhibition 2004.
- 2004-12-05 Frequency coordination by IARU completed.
The name of this project is Cute-1.7 + APD Project.
You might think 'CUTE-II' seems suitable for the name of the second project after CUTE-I project.
But when a new idea of this project came up, there already existed CUTE-II project in progress, where a satellite will be larger and its launch date will be later. Because this project expected earlier launch date than CUTE-II, a number greater than one and less than two was needed. It was finally named as Cute-1.7 + APD, one with a lucky number seven.
Papers and Presentations
Katsutoshi Imai, Naoki Miyashita, Masafumi Iai, Kuniyuki Omagari, Masashi Asami, Wataru Miyazawa, Hideyuki Yabe, Kei Miyamoto, Takeshi Usuda, Ken Fujiwara, Shinji Masumoto, and Saburo Matunaga, Tokyo tech small satellite development projects -"Cute 1.7" and "TSUBAME," Workshop for Space, Aeronautical and Navigational Electronics, Daejeon, Korea, March 4, 2005. Conference Homepage
Masafumi Iai, Shinji Masumoto, Saburo Matunaga, "Electrodynamic Tether System of Pico-Satellites for Orbital Debris Mitigation," JSME 13th Space Engineering Conference, Tokyo, January 21, 2005. Conference Homepage
Masafumi Iai, Kazuya Konoue, Koji Nakaya, Kyoichi Ui, Naoki Miyashita, Masashi Asami, Wataru Miyazawa, Kuniyuki Omagari, Yusuke Funaki, Katsutoshi Imai, Kei Miyamoto, Hideyuki Yabe, Ken Fujiwara, Shinji Masumoto, Takeshi Usuda, "Tokyo Tech's second microsatellite, Cute-1.7," Mechanical Engineering Congress 2004 International Symposium, September 6, 2004. Conference Homepage
Masafumi Iai, Yusuke Funaki, Hideyuki Yabe, Ken Fujiwara, Shinji Masumoto, Takeshi Usuda, Saburo Matunaga, Jun Kataoka, Tatsushi Shima, "A PDA-Controlled Pico-Satellite, Cute-1.7, and its Radiation Protection," 18th AIAA/USU Conference on Small Satellites, SSC04-IX-8, Logan, USA, August 12, 2004.
Your comments and suggestions are welcome, please write to:
Masafumi Iai, Cute-1.7 Project Manager