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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 ...
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 ...
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Dau Tieng helipads, 23 September 1967 Air controllers of the 2nd Battalion, 28th Infantry calling in aircraft to lift troops for redeployment, 18 February 1970. The base was established in October 1966.
Unfortunately, the X-17's limited altitude capability meant it could not reach the required altitude to hit mirror points in the South Pacific over the testing grounds. The only area that had a field low enough for the X-17 to hit easily was the South Atlantic Anomaly, where the Van Allen Belt descends as low as 200 kilometers (660,000 ft). [20]
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If a significant increase was observed by the system, an alarm would sound to alert the crew. Unfortunately, there is another phenomenon in low-Earth orbit that causes an increase in X-rays: the South Atlantic Anomaly.… When Skylab passed through the Anomaly, the station's X-ray detectors often triggered false alarms.
Mean anomaly, a measure of time in the study of orbital dynamics; Pioneer anomaly, the observed deviation of the trajectories of some uncrewed space probes, and especially Pioneer 10 and Pioneer 11; South Atlantic Anomaly, an area where the Earth's inner Van Allen radiation belt comes closest to the Earth's surface