“Equatorial plasma bubble”的意思、由来-开放百科全书

词条

Equatorial plasma bubble

释义

References

Equatorial plasma bubbles are an ionospheric phenomenon near the Earth's geomagnetic equator at night time. They affect radio waves by causing varying delays. They degrade the performance of GPS.^[1]

Different times of the year and location have different frequencies of occurrence. In Northern Australia, the most common times are February to April and August to October, when a plasma bubble is expected every night.^[1] Plasma bubbles have dimensions around 100 km.^[3] Plasma bubbles form after dark when the sun stops ionising the ionosphere. The ions recombine, forming a lower density layer. This layer can rise through the more ionised layers above via convection, which makes a plasma bubble. The bubbles are turbulent with irregular edges.^[3]

An equatorial plasma bubble could have affected the Battle of Shah-i-Kot by disabling communications from a communications satellite to a helicopter.^[2]

References

1. ^¹{{cite web|url=http://phys.org/news/2014-12-daily-space-weather-gps.html|title=Predicting daily space weather will help keep your GPS on target|last=Carter|first=Brett|date=5 December 2014|accessdate=5 December 2014}}
2. ^¹²{{cite web|url=http://phys.org/news/2014-09-space-aided-enemy-fatal-afghan.html|title='Space bubbles' may have aided enemy in fatal Afghan battle|last=Kelly|first=Michael|date=23 Sep 2014|accessdate=5 December 2014}}

1 : Ionosphere

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。