Cute 1.7 + APD (Oscar CO-56)

Launch data: Designation  28941 / 06005C Launch date  21 Feb 2006 - 21:28 UT Launch site  Uchinoura Launch vehicle  M-5 (2) Mission  Technology/Comsat Earth orbit: Perigee / Apogee  296 x 642 km Inclination  98.2° Period  94.0 min

Spacecraft data:

Description:

CUTE-1.7 (Cubical TITech Engineering Satellite) is a follow-on CubeSat project to CUTE-1 (launch June 30, 2003 and operational as of 2005) developed mainly by students of LSS (Tokyo Institude of Technology Laboratory for Space Systems) at the Tokyo Institute of Technology, Tokyo, Japan.

Overall project goals call for:

• the demonstration of new design technologies, and
• sharing of experiment opportunities with other institutes.

The CUTE-1.7 design depends on commercially finished products rather than only on commercial grade electric components. Specific mission goals are:

• Demonstration of PDA (Personal Digital Assistant) as an onboard computer
• Attitude control experiment using magnetic torquer
• Amateur radio service - digital repeater (digipeater)
• Demonstration of APD (Avalanche Photo Diode) sensor
• Tether deployment experiment

The double-cube satellite configuration conforms to the CubeSat standard in size (10 cm x 10 cm x 20 cm). The spacecraft design makes use of the so-called "SatelliteCore" concept, containing a functionally integrated bus system (for re-use on other systems). The SatelliteCore provides electrical power (3.3 V, 5 V, and unregulated) and USB (Universal Serial Bus) connection functions. This new SatelliteCore container is based on the CubeSat standard. The new SatelliteCore concept is intended to optimize cost and time of repetitive chores. However, the combination of the SatelliteCore container plus a mission/instrument container requires at least a double cube implementation for a mission.

Cute-1.7 + APD is launched as a sub-payload on the 3rd stage of Japanese solid rocket M-5. The main satellite is Astro F.
The planned orbit of Cute-1.7 + APD is 250-280 km in perigee height and 750 km 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.

Mission details:

• The tiny 3 kg CUTE-1.7-APD satellite built by Toyko Institute of Technology was ejected from the M-V-8 third stage at 21:45 UTC.