5:15 PM - 7:15 PM
[STT39-P05] Observation of the geothermal area in Azumayama using a hand-held infrared camera system for airborne remote sensing
Keywords:a portable cameras system, volcano observations, infrared camera
The National Research Institute for Earth Science and Disaster Resilience (NIED) has developed a hand-held infrared camera system for airborne remote sensing, the Structure and Thermal Information Capture-Portable (STIC-P), in March 2020. STIC-P does not require a dedicated aircraft and allows oblique airborne observation of volcanoes outside the eruption alert level zone and can produce ground-based orthorectified images through SfM/MVS processing.
Since 2021, NIED has been conducting continuous test observations aimed at operational observations for volcano using STIC-P. So far, test observations have been carried out at Hakone Owakudani (26 April 2021, 8 March 2023) and Nasudake (14 November 2021, 21 October 2022, 26 October 2023, 26 October 2024), and orthoimages were successfully created in all cases, we were able to estimate and compare the heat discharge rate of geothermal areas. In response to these results, NIED has set a new target volcano and is currently conducting test observations to verify the practicality of STIC-P.
In this report, we describe the results of the test observations conducted in Azumayama, which was selected as a new test observation target volcano for STIC-P. Observations of Azumayama using STIC-P were conducted on 9 November 2024. The observation conditions were as follows: the observation altitude was 2,700 m above sea level, and the observation line was a slant observation from a circular observation line with a radius of 1,500 m centred on the Oana crater of Azumayama, and multiple brightness temperature image data were acquired. We applied SfM/MVS processing to these images to create orthorectified images. From these results, we were able to quantitatively understand the brightness temperature distribution around the Azumayama Oana crater. The observed highest brightness temperature is 51.2°C near the Oana crater. The spatial resolution of the brightness temperature distribution around the Azumayama Oana crater, which was captured as an orthorectified image, was approximately 1.3 m, and it was possible to correlate it with the geothermal areas (W-6, W-10, etc.) identified in the results of previous geothermal surveys of the ground surface by the Japan Meteorological Agency. These results show that it is possible to obtain quantitative information on the geothermal area of Azumayama through operational observations using STIC-P.
Since 2021, NIED has been conducting continuous test observations aimed at operational observations for volcano using STIC-P. So far, test observations have been carried out at Hakone Owakudani (26 April 2021, 8 March 2023) and Nasudake (14 November 2021, 21 October 2022, 26 October 2023, 26 October 2024), and orthoimages were successfully created in all cases, we were able to estimate and compare the heat discharge rate of geothermal areas. In response to these results, NIED has set a new target volcano and is currently conducting test observations to verify the practicality of STIC-P.
In this report, we describe the results of the test observations conducted in Azumayama, which was selected as a new test observation target volcano for STIC-P. Observations of Azumayama using STIC-P were conducted on 9 November 2024. The observation conditions were as follows: the observation altitude was 2,700 m above sea level, and the observation line was a slant observation from a circular observation line with a radius of 1,500 m centred on the Oana crater of Azumayama, and multiple brightness temperature image data were acquired. We applied SfM/MVS processing to these images to create orthorectified images. From these results, we were able to quantitatively understand the brightness temperature distribution around the Azumayama Oana crater. The observed highest brightness temperature is 51.2°C near the Oana crater. The spatial resolution of the brightness temperature distribution around the Azumayama Oana crater, which was captured as an orthorectified image, was approximately 1.3 m, and it was possible to correlate it with the geothermal areas (W-6, W-10, etc.) identified in the results of previous geothermal surveys of the ground surface by the Japan Meteorological Agency. These results show that it is possible to obtain quantitative information on the geothermal area of Azumayama through operational observations using STIC-P.