MMS Observations of Upstream 3-Seconds Waves in Earth’s Foreshock Region: Initial Result
Presentation Type
Poster
Presenter Format
In Person Meeting Talk
Topic
Fundamental Processes in Comparative Magnetospheres
Start Date
10-5-2022 5:30 PM
Abstract
Ultra-low frequency (ULF) waves have been observed and studied extensively in the Earth’s ion foreshock region, with their basic wave properties determined. However, many questions regarding their plasma characteristics and generation mechanisms remain unanswered. One example of such ULF waves are the 3-seconds wave first observed in the ISEE magnetometer data [Le et al., 1992; Blanco-Cano et al., 1999] and more recently by MMS [e.g. Wang et al., 2021]. This class of ULF waves have periods near 3 seconds and are always right-handed, near circularly polarized in the spacecraft frame. In this study, we will present preliminary magnetic field and plasma measurements of case study events of 3-seconds waves as observed by MMS upstream of the Earth’s ion foreshock region.
MMS Observations of Upstream 3-Seconds Waves in Earth’s Foreshock Region: Initial Result
Ultra-low frequency (ULF) waves have been observed and studied extensively in the Earth’s ion foreshock region, with their basic wave properties determined. However, many questions regarding their plasma characteristics and generation mechanisms remain unanswered. One example of such ULF waves are the 3-seconds wave first observed in the ISEE magnetometer data [Le et al., 1992; Blanco-Cano et al., 1999] and more recently by MMS [e.g. Wang et al., 2021]. This class of ULF waves have periods near 3 seconds and are always right-handed, near circularly polarized in the spacecraft frame. In this study, we will present preliminary magnetic field and plasma measurements of case study events of 3-seconds waves as observed by MMS upstream of the Earth’s ion foreshock region.
