Characteristics of GPS TEC variations in the polar cap ionosphere

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...

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

The Polar Ionosphere: Editorial

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...

A Floating Vertical TEC Ionosphere Delay Correction Algorithm for Single Frequency GPS Receivers

This paper presents an innovative method to mitigate ionosphere delay error for single frequency receivers. Traditional approach to ionosphere delay correction is carried out through modeling the total electron content (TEC) along each satellite signal path. Because of the large deviation of the TEC during different times of the day, season, and solar cycle from any mean measurements, the ionos...