RESEARCH ON POSSIBLE SCIENTIFIC AND ENGINEERING EDUCATION BY DEVELOPING EDUCATIONAL SATELLITE MISSION

这项研究的目的是调查，建议，实验和评估可能的科学和工程教育利用一个实验卫星命名为SOHLA-1。SOHLA-1是由东大坂宇宙开发合作组织设计和建造的，名为Astro-Technology SOHLA。我们与SOHLA合作开发了一种教育使命设备，这是标准的业余无线电数字通信系统。其中一个主要组件是AX。25协议分组无线控制器称为TNC。研制的TNC能够以1200波特的速率发送状态遥测和文本信息。SOHLA-1卫星已在JAXA H2 A运载火箭的搭载式卫星上正式注册，该卫星计划于2008年8月发射。TNC的设计采用PIC/PSoC微控制器，不仅可以实现AX的编解码。25 UI帧数据，而且还调制/解调AFSK信号。这种类型的TNC的优点是简单，便宜，除了易于组装。无调制解调器的TNC是作为一个教育工具包，为每个教师和学生谁是试图参与拟议的教育项目。SOHLA-1状态遥测解码，我们开发了一个软件，通过Microsoft Visual Studio 2005 C#。由于该软件具有Windows标准的图形用户界面，因此对于任何学生来说都非常容易使用。解码能力通过使用Cubesat/XI-V成功验证。

The purpose of this research is to investigate, propose, experiment and evaluate a possible scientific and engineering education utilizing an experimental satellite named SOHLA-1. SOHLA-1 has been designed and constructed by Higashi-Osaka Space Development Cooperative named Astro-Technology SOHLA. We collaborated with SOHLA to develop an educational mission equipment, which is the standard amateur radio digital communication system. One of the main component is the AX. 25 protocol packet radio controller called TNC. The developed TNC is capable of sending status telemetry and text message at the rate of 1200 baud. SOHLA-1 has been formally registered with a piggy-back satellite of JAXA H2A rocket, which is scheduled to be launched in August 2008.We developed a modem-less TNC to receive packet data sent by SOHLA-1. We designed the TNC by using PIC/PSoC micro controllers not only to encode/decode AX. 25 UI frame data but also modulate/demodulate AFSK signal. Advantages of this type of TNC are simple and inexpensive in addition to be easy to assemble it. The modem-less TNC is available as an educational kit for every teacher and student who are attempting to participate in the proposed educational project.To decode SOHLA-1 status telemetry, we developed a software by means of Microsoft Visual Studio 2005 C#. Since the software has the Windows standard graphical user interface, it is quite easy to use for any student. Decoding capability was successfully verified by using Cubesat/XI-V.