We develop the tissue-equivalent proportional counter (TEPC) type’s space radiation dosimeter to measure in-situ aviation radiation. That was originally developed as a payload of small satellite in the low-earth orbit. This dosimeter is based on a TEPC. It is made of an A-150 tissue-equivalent plastic shell of an internal diameter of 6 cm and a thickness of 0.3 cm. TEPC is filled with pure propane at 13.9 torrs to simulate a cell diameter of 2 μm. And the associated portable and low power electronics are also implemented. The verification experiments have been performed by the calibration experiments at ground level and compared with Liulin observation at aircraft altitude during the flight between Incheon airport (ICN) and John F. Kennedy airport (JFK). We found that the TEPC dosimeter can be used as a monitor for space radiation dosimeter at aviation altitude based on the verification with Liulin observation.

1. INTRODUCTION
2. SPACE RADIATION DOSIMETER FOR AVIATION RADITATION
    2.1 Tissue-Equivalent Proportional Counter
    2.2 SRDAS electronics
    2.3 Algorithm for Dose Calculation of TEPC
3. Results and Discussion
    3.1 TEPC performance at standard radiation field
    3.2 Flight experiments
4. CONCLUSION
REFERENCES

• Uk-won Nam(Korea Astronomy and Space Science Institute)
• Won-kee Park(Korea Astronomy and Space Science Institute)
• Junga Hwang(Korea Astronomy and Space Science Institute/Department of Astronomy and Space Science, Korea University of Science and Technology) Corresponding Author
• Jongdae Sohn(Korea Astronomy and Space Science Institute)
• Bongkon Moon(Korea Astronomy and Space Science Institute)
• Sunghwan Kim(Department of Radiology, Cheongju University)