In GNSS, one of the main error sources of the Standard Positioning Service (SPS) is introduced by the ionosphere.
this error can be cancelled by combining two signals at different
frequencies, most of the single
market receivers do not benefit from this cancel
ation. For that reason, a set of parameter
is included in the navigation
message in order to compute the ionospheric delay of any observation by the
Klobuchar model. The Klobuchar model is a very
simple model that is able to remove more than the 50% of the ionospheric delay.
Recently, more accurate ionospheric models
have been introduced such as Global Ionospheric Map (GIM) or the
) ionospheric model.
In previous works, with data gathered in Europe, it was shown the advantage of the
PPP’s ionospheric model. In this work,
we conduct experiments
to compare the performance of different ionospheric
methods including: Klobuchar, GIM
PPP. Our preliminary results show how
PPP and GIM
lead to better positioning precisions compared to the Klobuchar
model. However, since data is not wide enough to cover different ionospheric cond
itions, more experiments will be
in our future work to validate the current result
CitacióVinh, L. [et al.]. Experiments on the Ionospheric Models in GNSS. A: International Conference on Space, Aeronautical and Navigational Electronics. "IEICE Technical Report Vol.113 No. 335". Hanoi: 2013, p. 197-202.