A study of GPS ionospheric scintillations observed at Guilin

作者：Zou, Yuhua^*; Wang, Dongli

来源：Journal of Atmospheric and Solar-Terrestrial Physics, 2009, 71(17-18): 1948-1958.

DOI：10.1016/j.jastp.2009.08.005

• Ionospheric scintillation
• Ionospheric irregularities
• GPS
• GPS-COSMIC radio occultation

The occurrence of strong ionospheric scintillations with S4 >= 0.2 was studied using global positioning system (GPS) measurements at Guilin (25.29 degrees N, 110.33 degrees E; geomagnetic: 15.04 degrees N, 181.98 degrees E), a station located near the northern crest of equatorial anomaly in China. The results are presented for data collected from January 2007 to December 2008. The results show that amplitude scintillations occurred only during the first five months of the considered years. Nighttime amplitude scintillations, observed mainly in the south of Guilin, always occurred with phase scintillations, total electron content (TEC) depletions, and Rate Of change of TEC (ROT) fluctuations. However, TEC depletions and ROT fluctuations were weak during daytime amplitude scintillations, and daytime amplitude scintillations usually occurred in most of the azimuth directions. GPS scintillation/TEC observations recorded at Guilin and signal-to-noise-ratio measurements obtained from GPS-COSMIC radio occultation indicate that nighttime and daytime scintillations are very likely caused by ionospheric F region irregularities and sporadic E, respectively.

• 出版日期2009-12
• 单位桂林电子科技大学