Characterization of the South Atlantic Anomaly

Abstract

Abstract. This research intends to characterize the South Atlantic Anomaly (SAA) by applying the power spectrum analysis approach. The motivation to study the SAA region is due to its nature. A comparison was made between the stations in the SAA region and outside the SAA region during the geomagnetic storm occurrence (active period) and the normal period where no geomagnetic storm occurred. The horizontal component of the data of the Earth's magnetic field for the occurrence of the active period was taken on 11 March 2011 while for the normal period it was taken on 3 February 2011. The data sample rate used is 1 min. The outcome of the research revealed that the SAA region had a tendency to be persistent during both periods. It can be said that the region experiences these characteristics because of the Earth's magnetic field strength. Through the research, it is found that as the Earth's magnetic field increases, it is likely to show an antipersistent value. This is found in the high-latitude region. The lower the Earth's magnetic field, the more it shows the persistent value as in the middle latitude region. In the region where the Earth's magnetic field is very low like the SAA region it shows a tendency to be persistent.

Identification of Fractal Properties in Geomagnetic Data of Southeast Asian Region during Various Solar Activity Levels

“…Despite the global coverage of stations, the Southeast Asia region was not included in their study. Recently, the study by Nasuddin et al [24] characterized H-component data over the South Atlantic Anomaly region during the quiet and disturbed days of the year 2011. However, their study only utilized a single method of PSA and only short-term data were analyzed.…”

How “Rad” Is a Trip to Space? A Brief Discussion of Radiation Exposure in Suborbital Space Tourism

“…Fortunately, it will have no impact on the current suborbital trajectories in space tourism. The lowest altitude one can come into contact with the Van Allen belts is approximately 200 km above sea level at a specific location above the Earth known as the South Atlantic anomaly [14]. This is well beyond the current flight plan's peak altitude.…”

South Atlantic Anomalyduring ascending and maximum phase of solar cycle 24

“…Research on the SAA with applying power spectrum analysis method has been conducted by Nasuddin et. al (2019).…”

“…Based on the research conduct on the analyzation of SAA during active period on 11 March 2011 and normal period 3 February 2011, the outcome reveal SAA has a tendency to be persistent during active period (11 March 2011) and normal period (3 February 2011) when compare to other region such as middle latitude region and high latitude region in the research. As an extension to do work done by Nasuddin et al (2019), four regions which are the SAA region, low latitude region, middle latitude region and high latitude region are being studied during different year to examine the influence of solar cycle 24 on the regions. Therefore, a research carried out regarding SAA can be used as a reference in the satellite launch and increase knowledge in the field of geomagnetic field (Nasuddin et al, 2015).…”

“…Random noise For = 0.5 signify a random series. It can also mean data are not correlatedthat is, no dependence between current and past data (Nasuddin et al, 2019).…”