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

美国业余火箭于2000年7月28日至29日和2001年8月24日至25日在美国内华达州黑岩沙漠研制并发射了350毫升罐大小的卫星，并将其发射到4公里的高度。在下降过程中，进行了与微卫星技术有关的各种实验。本项目旨在进行轨道微卫星的技术开发和论证，研究适合微纳卫星的系统架构和系统集成，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、DGPS测量进行了下降速度控制实验。东京工业大学进行了CCD图像采集与传输、传感器数据采集与快速数据传输、GPS与DGPS测量、大功率CCD图像传输与SSTV实验。2001年，两所大学共同研制了三倍于350毫升CanSat的CanSat，在其上进行了GPS实时测量、机载控制计算和通过电机机构改变伞翼形状的自主返航实验。所获得的这些技术和项目管理知识已被两所大学广泛应用于实际轨道卫星“立方体”的开发。

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.