11:15 AM - 11:30 AM
[MTT39-09] A trial of in-situ infrasonic/audible sound measurements in lower/middle troposphere using a glide recovery type balloon observation sysytem
Keywords:Infrasound, Glide recovery type baloon observation system
In order to understand propagation characteristics in higher troposphere and lower stratosphere, conducting in-situ infrasonic/audible sound measurements in high altitude atmosphere is important. Recently, small infrasound sensors of SAYA INF03/INF03S were developed and has been used on ground as well as aboard IST's MOMO series sounding rockets. For future reusable balloon system launches, Stratovision company developed a glide recovery type small balloon observation system with remote-controlled small parafoil so as to plan upcoming low cost, safer, and repeated flight experiments as well as formation flights with carrying some small in-situ sensor instruments for atmospheric study or some environmental tests for future Mars landing instruments.
In Nov. 2024, Kochi University of Technology and Seikei University conducted two flight experiments of the glide recovery type balloon system, fully supported with Stratovision company, as their first trials. Aboard the balloon system, an INF03S infrasound sensor as well as an audible sound recorder launched at Nobeoka, Miyazaki pref., respectively. Although the first balloon reached 4000 m altitude, release of the glide recovery system was failed, making the INF03S sensor lost. For the second balloon reached 4500 m and the glide recovery system was released successfully using wire cutting function, resulting in successful audible sound measurement more than 1 hour up to 4500 m along the trajectory for both up/down legs.
After returning back on sea surface level with using GNSS coordinates tracking information received at launching site with LoRa LPWA communication, recovery team on a small fishermen boat successfully found the recovery system floated on the sea. The audible sound recorder with the sound data files on a microSD card was recovered.
In this paper, we will introduce the glide recovery type small balloon observation system with the recorded sound data containing some sound events and background noise level environment recorded on the ascending small balloon and the parafoil controlled descent, as basics of the fly-back small balloon experiments for future studies.
In Nov. 2024, Kochi University of Technology and Seikei University conducted two flight experiments of the glide recovery type balloon system, fully supported with Stratovision company, as their first trials. Aboard the balloon system, an INF03S infrasound sensor as well as an audible sound recorder launched at Nobeoka, Miyazaki pref., respectively. Although the first balloon reached 4000 m altitude, release of the glide recovery system was failed, making the INF03S sensor lost. For the second balloon reached 4500 m and the glide recovery system was released successfully using wire cutting function, resulting in successful audible sound measurement more than 1 hour up to 4500 m along the trajectory for both up/down legs.
After returning back on sea surface level with using GNSS coordinates tracking information received at launching site with LoRa LPWA communication, recovery team on a small fishermen boat successfully found the recovery system floated on the sea. The audible sound recorder with the sound data files on a microSD card was recovered.
In this paper, we will introduce the glide recovery type small balloon observation system with the recorded sound data containing some sound events and background noise level environment recorded on the ascending small balloon and the parafoil controlled descent, as basics of the fly-back small balloon experiments for future studies.