Question

What are some methods that can be used to get rid of or reduce ionospheric delay?

Answer 1

Ionoshpeic dealy is one othe major error sources in GNSS and is normally about a ten meters but it can go upto 100 metres in major ionic disturbances.It changes through a daily circle.It is least in midnight and early morning and maximum in daylight hours.some of the methods to reduce the ionospheric delay are -

1.GPS filtering

2.Using one frequency -Klobuchar model (GPS), NeQuick model (GALILEO)

3.Using two Frequencies -Differential GPS,Real Time Kinematics

4.Use of New GNSS system