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The South Atlantic Anomaly (SAA) is an area where Earth's inner Van Allen radiation belt comes closest to Earth's surface, dipping down to an altitude of 200 kilometres (120 mi). This leads to an increased flux of energetic particles in this region and exposes orbiting satellites (including the ISS ) to higher-than-usual levels of ionizing ...
About 1800 km southwest of Cape Town, South Africa, USS Norton Sound launched three modified X-17A missiles armed with 1.7 kt W-25 nuclear warheads into the upper atmosphere, where high altitude nuclear explosions occurred. Due to the South Atlantic Anomaly, the Van Allen radiation belt is closer to the
In 2011, a study confirmed earlier speculation that the Van Allen belt could confine antiparticles. The Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) experiment detected levels of antiprotons orders of magnitude higher than are expected from normal particle decays while passing through the South Atlantic Anomaly.
Our two or three passes at high altitude through the South Atlantic Anomaly will be almost the entirety of the radiation load on the mission and like an equivalency of three months on the ...
In October 1984, a National Intelligence Estimate on the South African nuclear program noted: There is still considerable disagreement within the Intelligence Community as to whether the flash in the South Atlantic detected by a US [redacted] satellite in September 1979 was a nuclear test, and if so, by South Africa. If the latter, the need for ...
A minimum intensity occurs in the South Atlantic Anomaly over South America while there are maxima over northern Canada, Siberia, and the coast of Antarctica south of Australia. [16] The intensity of the magnetic field is subject to change over time.
The University of Iowa (under Van Allen) noted that all of the zero counts per second reports were from an altitude of 2,000+ km (1,250+ miles) over South America, while passes at 500 km (310 mi) would show the expected level of cosmic rays. This is called the South Atlantic Anomaly. Later, after Explorer 3, it was concluded that the original ...
For decades, Notre Dame lived in a world where the big-name independent was not an anomaly. Miami, Pitt, Florida State and Syracuse were among them, as was this week's opponent, Penn State. In that atmosphere, the Fighting Irish went along with others in the 1970s and joined the College Football Association, which was established to maximize ...