09:30 〜 09:45
[PEM12-21] Investigation of the daytime sporadic-E layer by the RIDE campaign 2025
キーワード：電離圏、スポラディックE層、電波伝搬、観測ロケット
The Rocket Investigation of the Daytime E-region (RIDE) campaign is scheduled to take place in the summer of 2025 in Japan. This is a coordinated observational campaign involving the S-310-46 sounding rocket launched from Uchinoura, Japan, along with a ground-based network that includes ionosondes, VHF receivers, and GNSS receivers. The campaign was postponed due to technical issues with the sounding rocket in the summer of 2024." There are three objectives of this campaign as follows:
(1) Elucidate phenomena in which the interaction between neutral atmosphere and plasma is important by combining in-situ observations by the sounding rocket with a numerical model and ground-based observations.
(2) Develop instrumental packages to measure the neutral atmosphere, plasma, and electromagnetic fields for sounding rockets and satellites.
(3) Foster human resources for future missions.
This campaign is designed to reveal sporadic-E layers' formation and transportation process. Such information is essential for predicting anomalous radio wave propagation caused by sporadic-E layers. The ground-based network of ionosondes and GNSS receivers monitors the horizontal structure and movement of Es layers. This information will be used to make the launch decision for the sounding rocket aimed at the moderate or intense Es layer. Seven scientific payloads are carried on the RIDE rocket. These include the Neutral Mass Spectrometer (NMS), Neutral Density and Wind Instrument (IOG), Ion Velocity Analyzer (IVA), Impedance Probe (NEI), Fast Langmuir Probe (FLP), Electric Field Detector (EFD), and Magnetometer (MAG). The physical parameters of both the neutral and ionized atmosphere, inside and outside the Es layers, will provide crucial information to help solve several unresolved questions about the Es layers. Why are Es layers so sporadic? Do they have frontal structures? What role does the electric field play in their formation and transport? Do atmospheric gravity waves contribute significantly? Combination of high-resolution data of the in-situ measurement, and wide field-of-view data of the ground-based network, and three-dimensional numerical simulation coupled with a global model is expected to elucidate the Es layer processes that have been unclear so far. The outline of the observation and scientific targets will be presented in the presentation.
(1) Elucidate phenomena in which the interaction between neutral atmosphere and plasma is important by combining in-situ observations by the sounding rocket with a numerical model and ground-based observations.
(2) Develop instrumental packages to measure the neutral atmosphere, plasma, and electromagnetic fields for sounding rockets and satellites.
(3) Foster human resources for future missions.
This campaign is designed to reveal sporadic-E layers' formation and transportation process. Such information is essential for predicting anomalous radio wave propagation caused by sporadic-E layers. The ground-based network of ionosondes and GNSS receivers monitors the horizontal structure and movement of Es layers. This information will be used to make the launch decision for the sounding rocket aimed at the moderate or intense Es layer. Seven scientific payloads are carried on the RIDE rocket. These include the Neutral Mass Spectrometer (NMS), Neutral Density and Wind Instrument (IOG), Ion Velocity Analyzer (IVA), Impedance Probe (NEI), Fast Langmuir Probe (FLP), Electric Field Detector (EFD), and Magnetometer (MAG). The physical parameters of both the neutral and ionized atmosphere, inside and outside the Es layers, will provide crucial information to help solve several unresolved questions about the Es layers. Why are Es layers so sporadic? Do they have frontal structures? What role does the electric field play in their formation and transport? Do atmospheric gravity waves contribute significantly? Combination of high-resolution data of the in-situ measurement, and wide field-of-view data of the ground-based network, and three-dimensional numerical simulation coupled with a global model is expected to elucidate the Es layer processes that have been unclear so far. The outline of the observation and scientific targets will be presented in the presentation.