GPS TEC response to Pc4 “giant pulsations”

Towards Observing Tsunamis in the Ionosphere Using GPS TEC Measurements

Tsunamis have been a significant threat to humans living in coastal regions throughout recorded history. The recent tsunami of September 29, 2009 was a tragic reminder of this fact, as the waves caused over 180 deaths on the islands of Samoa, American Samoa, and Apia in the south Pacific. Recent modeling results and observations have demonstrated that the ionospheric signature of an ocean tsuna...

Space Weather Effects Detected by Gps Based Tec Monitoring

The world-wide use of GPS satellites for navigation and positioning offers the unique chance for permanent monitoring the total electron content (TEC) of the ionosphere on global scale. Based on the analysis of GPS-derived TEC maps computed at DLR/DFD Neustrelitz for the European area on a routine base with a time resolution of 10 min the paper demonstrates the power of this new tool to detect ...

Nonlinear Estimation to Assimilate GPS TEC Data into a Regional Ionosphere Model

A new method of is being developed to estimate the ionosphere’s 3-dimensional electron density distribution based on GPS slant TEC data. The goal of this effort is to develop a generalized parametric ionospheric model that is amenable to data assimilation using powerful nonlinear least-squares batch filtering techniques and related techniques. In addition to assimilating GPS TEC data, this meth...

بررسی تغییرات زمانی- مکانی TEC در ایران با استفاده از مشاهدات GPS

طی سالیان گذشته، استفاده از GPS به عنوان یک ابزار منحصربه‌فرد، در مطالعۀ چگونگی گذر امواج الکترومغناطیس ازلایه‌های مختلف اتمسفر به‌خصوص یونسفر مطرح بوده‌است. در حال حاضر یونسفر عمده‌ترین منبع خطا در موقعیت‌یابی با GPS محسوب-گردیده و میزان تاًثیر آن روی انتشار موج بستگی به مقدار TEC و فرکانس سیگنال دارد. در این مقاله تغییرات زمانی-مکانی TEC در ایران با استفاده از مشاهدات حدود 40 ایستگاه IPGN مورد...

Plasmasphere and Upper Ionosphere Contributions and Corrections During the Assimilation of GPS Slant TEC