Operational Multi‐GNSS Global Ionosphere Maps at GFZ Derived From Uncombined Code and Phase Observations

Iranian Permanent GPS Network Receivers Differential Code Biases Estimation Using Global Ionospheric Maps

Measurements of the dual frequency Global Positioning System (GPS) receivers can be used to calculate the electron density and the total electron content (TEC) of the ionosphere layer of the Earth atmosphere. TEC is a key parameter for investigating the ongoing spatial and temporal physical process of the ionosphere. For accurate estimation of TEC from GPS measurements, GPS satellites and GPS r...

Differential Code Bias Estimation using Multi-GNSS Observations and Global Ionopshere Maps

Measurements of Global Navigation Satellite System (GNSS) receivers are affected by systematic offsets related to group and phase delays of the signal generation and processing chain. The resulting code and phase biases depend on the transmission frequency and the employed signal modulation. Within this study differential code biases (DCBs) of legacy and modernized GNSS signals are derived from...

Modeling Mars’ ionosphere with constraints from same‐day observations by Mars Global Surveyor and Mars Express

[1] We have analyzed a brief period of same‐day observations of the Martian ionosphere using data obtained in December 2004 from the Mars Global Surveyor (MGS) and Mars Express (MEX) radio occultation experiments. These data were taken shortly after sunrise under solstice conditions in both hemispheres, with MGS in the summer (northern) hemisphere at high latitudes while MEX was in the winter (...

Alfvén wave characteristics of equatorial plasma irregularities in the ionosphere derived from CHAMP observations

*Correspondence: Hermann Lühr, Section 2.3, Earth’s Magnetic Field, GFZ, Telegrafenberg, Potsdam 14473, Germany e-mail: [email protected] We report magnetic field observations of the components transverse to the main field in the frequency range 1–25 Hz from times of equatorial plasma irregularity crossings. These field variations are interpreted as Alfvénic signatures accompanying intermed...

Performance Analysis of Empirical Ionosphere Models by Comparison with CODE Vertical TEC Maps