Study on trial development of can sized satellites and sub-orbital launch experiment by Japan-US collaboration

美国于2000年7月28-29日和2001年8月24-25日在美国内华达州黑岩沙漠用美国业余火箭研制了350毫升罐装卫星，并将其发射到4公里高度。在降落过程中，进行了与微小卫星技术有关的各种实验。该项目旨在进行真实轨道微小卫星的技术开发和示范，检验适合于微纳卫星的系统架构和系统集成，以及培养大学生的项目管理技能。2000年，东京大学通过改变降落伞形状、自主站立机构、实时GPS测量和下行链路以及DGPS测量进行了下降速度控制实验。东京工业大学进行了CCD图像采集和传输、传感器数据采集和快速数据传输、GPS和DGPS测量、高功率CCD图像传输和SSTV实验。2001年，两所大学研制了3倍于350毫升的CanSat，在其上进行了GPS实时测量、星上控制计算和通过电机机构改变翼伞形状的自主飞回实验。这些技术和项目管理知识已被两所大学广泛用于实际轨道卫星“立方体卫星”的研制。

350 ml can sized satellites have been developed and launched to 4 km altitude by US amateur rockets in Black Rock Desert in Nevada of United States on July 28-29, 2000 and August 24-25, 2001. During descent, various experiments related to micro satellite technologies were performed. This project aims for technology development and demonstration leading to real orbital micro satellites, examination of systems' architecture and system integration suitable for micro or nano satellites, and training of project management skills for university students.In 2000, University of Tokyo performed experiments of descent velocity control by changing parachute shape, autonomous standing mechanism, real time GPS measurement and down link, and DGPS measurement. Tokyo Institute of Technology performed experiments of CCD image capture and transmission, sensor data acquisition and fast data transmission, GPS and DGPS measurement, high power CCD image transmission and SSTV. In 2001, both universities developed CanSats three times as large as 350 ml CanSat, on which autonomous fly back experiment using GPS real time measurement, onboard control calculation and changing parafoil shape by motor mechanism. These technological as well as project management knowledge obtained have been extensively utilized for the development of actual orbital satellite named "CubeSat" by both universities.