SIMULATION STUDY OF THE ENERGETIC NEUTRAL ATOM (ENA) IMAGING MONITORING OF THE GEOMAGNETOSPHERE ON A LUNAR BASE
Journal Title: Solar-Terrestrial Physics - Year 2021, Vol 7, Issue 3
Abstract
Since the moon’s revolution cycle is exactly the same as its rotation cycle, we can only see the moon always facing Earth in the same direction. Based on the clean particle radiation environment of the moon, a neutral atomic telemetry base station could be established on the lunar surface facing Earth to realize long-term continuous geomagnetic activity monitoring. Using the 20°×20° field of view, the 0.5°×0.5° angle resolution, and the ~0.17 cm²sr geometric factor, a two-dimensional ENA imager is being designed. The magnetospheric ring current simulation at a 4–20 keV energy channel for a medium geomagnetic storm (Kp=5) shows the following: 1) at ~60 Rᴇ (Rᴇ is the Earth radius), the imager can collect 10⁴ ENA events for 3 min to meet the statistical requirements for 2D coded imaging data inversion, so as to meet requirements for the analysis of the substorm ring current evolution process of magnetic storms above medium; 2) the ENA radiation loss puzzles in the magnetopause and magnetotail plasma sheet regions have been deduced and revealed using the 2-D ENA emission model. High spatial-temporal resolution ENA imaging monitoring of these two important regions will provide the measurement basis for the solar wind energy input process and generation mechanism; 3) the average sampling interval of ENA particle events is about 16 ms at the moon’s orbit; the spectral time difference for the set energy range is on the order of minutes, which can provide location information to track the trigger of geomagnetic storm particle events.
Authors and Affiliations
Li Lu, Qing-Long Yu, Ping Zhou, Xin Zhang, Xin Zhang, Xin-Yue Wang, Yuan Chang
Keywords
Related Articles
- EP ID EP697557
- DOI 10.12737/stp-73202101
- Views 141
- Downloads 0
Observations of coronal holes with the Siberian Radioheliograph
Multi-wavelength observations of a coronal hole (CH) with two-dimensional spatial resolution have been made for the first time in the frequency range from 2.8 to 12 GHz. At frequencies below 6 GHz, the average brightness...
CORONAL JETS AS A CAUSE OF MICROWAVE NEGATIVE BURSTS
We have investigated the cause of three “isolated” negative radio bursts recorded one after another at several frequencies in the 1–17 GHz range at the Nobeyama Radio Observatory, Ussuriysk Astrophysical Observatory, and...
MORPHOLOGY AND DIAGNOSTIC POTENTIAL OF THE IONOSPHERIC ALFVÉN RESONATOR
The layering of the ionosphere leads to the formation of resonators and waveguides of various kinds. One of the most well-known is the ionospheric Alfvén resonator (IAR) whose radiation can be observed both on Earth’s su...
Semi-empirical method of studying the D-layer aeronomy. II. Evidence-based calibration of the method
This paper presents the results of evidence-based calibration of a new semi-empirical method for studying the D-layer aeronomy. We use simultaneous measurements of altitude profiles of electron density Ne(h) and ionizati...
Response of the mid-latitude atmosphere to sporadic cosmic ray variations in the western Siberian region
The article presents the results of long-term observations of cosmic ray variations and changes in atmospheric parameters at midlatitudes in the Novosibirsk Region. The atmospheric response to Forbush decreases in galact...